Acoustic cloning
Jonas Müller, Theodor S. Becker, Xun Li, Johannes Aichele, Marc Serra-Garcia, Johan O.A. Robertsson, and Dirk-Jan van Manen
Phys. Rev. Applied 20, 064014 (2023) – Published 8 December 2023
Physics logo Focus: Creating an Audio “Hallucination”

You might hear an echo in the mountains, but can you hear your voice reflecting from the mug on your desk? Probably not: The intensity of that reflected sound is negligible, compared to the other reflections in your office…and what if we put out more mugs? Acoustic cloning, a form of holography, allows us to study acoustic wave propagation and reflection from a physical scatterer, even with modifications to that object. This study presents both theoretical framework and experimental implementation. The method is expected to be widely applicable in all domains of acoustic scattering, such as material characterization, active metamaterials, and virtual-acoustics applications.

Show Abstract 
Acoustics
Metamaterials
PDFHTML
Editors' Suggestion
Longitudinal coupling between a 
Si
/
Si
1
−
x
Ge
x
 double quantum dot and an off-chip 
Ti
N
 resonator
J. Corrigan, Benjamin Harpt, Nathan Holman, Rusko Ruskov, Piotr Marciniec, D. Rosenberg, D. Yost, R. Das, William D. Oliver, R. McDermott, Charles Tahan, Mark Friesen, and M.A. Eriksson
Phys. Rev. Applied 20, 064005 (2023) – Published 4 December 2023

Far-off-resonant couplings are useful in quantum computing because they do not require special tunings of device components, but still await further exploration. The authors use a “flip-chip” coupling geometry to unequivocally demonstrate the presence of a far-off-resonant longitudinal coupling between a quantum-dot charge qubit and a microwave cavity, which can be turned on or off at will. This work provides a powerful and versatile tool for reading out and coupling quantum-dot qubits over large distances.

Show Abstract 
Quantum Information
Semiconductor Physics
Superconductivity
PDFHTML
Editors' Suggestion
Superresolution magnetic imaging by a Josephson junction via holographic reconstruction of 
I
c
(
H
)
 modulation
Razmik A. Hovhannisyan, Taras Golod, and Vladimir M. Krasnov
Phys. Rev. Applied 20, 064012 (2023) – Published 7 December 2023

Magnetic sensors generally exhibit a trade-off between spatial resolution and field sensitivity: As sensor size decreases, resolution improves but sensitivity deteriorates. This study reveals that the field distribution in a superconducting Josephson junction can be inferred by analyzing the diffractionlike magnetic field modulation of the critical current 
I
c
. Here the spatial resolution is constrained solely by the field range of the 
I
c
(
H
)
 pattern and is unrelated to the junction’s size. A remarkable feature of this detection method is that high spatial resolution accompanies high field sensitivity.

Show Abstract 
Magnetism
Nanophysics
Superconductivity
PDFHTML
Editors' Suggestion
Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low excitation power triplet-triplet annihilation
Andrei Stankevych, Rishabh Saxena, Jeannine Grüne, Sebastian Lulei, Andreas Sperlich, Stavros Athanasopoulos, Alexander Vakhnin, Prakhar Sahay, Wolfgang Brütting, Vladimir Dyakonov, Heinz Bässler, Anna Köhler, and Andrey Kadashchuk
Phys. Rev. Applied 20, 064029 (2023) – Published 15 December 2023

This work demonstrates that triplet-triplet annihilation (TTA) is the predominant mechanism of intrinsic photogeneration of charge-carrier pairs via autoionization, in a single-component disordered organic system with no heavy atoms. The findings challenge established beliefs by revealing efficient carrier generation via TTA upon excitation near the absorption edge. Photocurrent measurements, optical spectroscopy, and spin-sensitive techniques support this model of bimolecular charge generation. Such mechanisms in organic semiconductors are relevant not just for OLEDs, but also for long-persistent luminescence, photovoltaics, and potentially for photocatalytic water splitting.

Show Abstract 
Energy Research
Optoelectronics
Semiconductor Physics
PDFHTML
Editors' Suggestion
Ionization clamping in ultrafast optical breakdown of transparent solids
Anton Rudenko, Jerome V. Moloney, and Pavel Polynkin
Phys. Rev. Applied 20, 064035 (2023) – Published 19 December 2023

Internal modifications of transparent solid-state materials by intense, ultrashort laser pulses enable numerous applications in micromachining, photonics, and medicine. Understanding the highly nonlinear propagation of the laser beam through the interaction zone is important in developing these technologies. Here a comprehensive propagation model reveals that even under extremely tight focusing, the key physical quantities are rigidly clamped by plasma shielding, at values up to two orders of magnitude lower than those inferred from earlier studies. Potential routes to overcome the clamping limits are discussed.

Show Abstract 
Materials Science
Optics
Plasma Physics
PDFHTML
Editors' Suggestion
Neural sensing and control in a kilometer-scale gravitational-wave observatory
N. Mukund, J. Lough, A. Bisht, H. Wittel, S. Nadji, C. Affeldt, F. Bergamin, M. Brinkmann, V. Kringel, H. Lück, M. Weinert, and K. Danzmann
Phys. Rev. Applied 20, 064041 (2023) – Published 22 December 2023

Aligning suspended optics in gravitational-wave observatories is crucial for detecting astrophysical phenomena⏤and it is also challenging, due to several environmental factors. This research implements neural-network-based sensing and control deployed at the GEO600 detector, utilizing a sensor with a convolutional neural network and long- and short-term memory, plus a deep-reinforcement-learning-based agent for enhanced alignment. The method demonstrates sensitivity improvement over traditional schemes, thus offering a practical approach for AI-based real-time control of gravitational-wave interferometers, to aid the detection of cosmic events like merging compact neutron-star binaries.

Show Abstract 
Astrophysics
Computational Physics
Optics
PDFHTML
Editors' Suggestion
Injection mechanisms in a III-nitride light-emitting diode as seen by self-emissive electron microscopy
Tanay Tak, Cameron W. Johnson, Wan Ying Ho, Feng Wu, Mylène Sauty, Steve Rebollo, Andreas K. Schmid, Jacques Peretti, Yuh-Renn Wu, Claude Weisbuch, and James S. Speck
Phys. Rev. Applied 20, 064045 (2023) – Published 26 December 2023

While charge carriers in electronics are fundamental to device operation, little is empirically known about their spatial distribution under standard operating conditions. The authors develop a technique for self-emissive electron microscopy that allows them to image electrons close to their point of generation in operando. Increased electron emission, and thus carrier density, is observed at the ridges of V-shaped defects in a green LED, confirming that the sidewalls of these defects allow lateral carrier injection⏤a necessity for increasing efficiency. Measuring the spatial distribution of carriers with this technique can inform the design of superior devices.

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Energy Research
Optoelectronics
Semiconductor Physics
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PERSPECTIVES
Perspective
Magnetically aware actuating composites: Sensing features as inspiration for the next step in advanced magnetic soft robotics
Eduardo Sergio Oliveros-Mata, Rui Xu, Lin Guo, and Denys Makarov
Phys. Rev. Applied 20, 060501 (2023) – Published 27 December 2023

The integration of magnetic soft actuators and printed magnetic field sensors presents a compelling strategy for advancing soft robotics, with transformative implications for interactivity. This Perspective discusses the synergy between these technologies, which combined will provide mechanically conformal feedback systems to tracking complex dynamics at high speeds and increase environmental compatibility. These insights are meant to guide the field toward a future where multifunctional magnetic composites with printable, transparent, healable, and biocompatible properties operate seamlessly in parallel, reshaping the possibilities of soft robotics.

Show Abstract 
Magnetism
Mechanics
Soft Matter
PDFHTML
LETTERS
Letter
Reduction of the electron-beam divergence of laser wakefield accelerators by integrated plasma lenses
Y.-Y. Chang, J. Couperus Cabadağ, A. Debus, A. Ghaith, M. LaBerge, R. Pausch, S. Schöbel, P. Ufer, U. Schramm, and A. Irman
Phys. Rev. Applied 20, L061001 (2023) – Published 4 December 2023

Laser-driven plasma accelerators (LPAs) can generate particle beams with high peak current in a short acceleration distance, making them a promising radiation source in compact setups. However, minimizing beam divergence at the exit of an LPA is crucial for effective beam transport, particularly in free-electron lasers (FELs). The authors implement an integrated plasma lens just a centimeter behind the LPA, effectively collimating the electron beam in a straightforward setup. This technique is essential for generating LPA-driven seeded FELs, and has potential for creating specific density profiles for adiabatic focusing, or for the staging of accelerators.

Show Abstract 
Optics
Particles and Fields
Plasma Physics
PDFHTML
Letter
Suppression of high-frequency components in off-resonant modulated driving protocols for Rydberg-blockade gates
Yuan Sun
Phys. Rev. Applied 20, L061002 (2023) – Published 14 December 2023

In the rapidly developing cold-atom-qubit platform, off-resonant modulated driving (ORMD) allows us to realize good two-qubit entangling gates. To achieve high fidelities with Rydberg-blockade gates under practical conditions, the high-frequency components in a modulation pattern must be dealt with. This study’s filtering approach is applicable to constructing entangling gates that work at finite Rydberg-blockade strength, and to overcome the residual thermal motion of qubit atoms. These results are expected to provide an essential upgrade for such gates.

Show Abstract 
Atomic and Molecular Physics
Optics
Quantum Information
PDFHTML
Letter
Thermodynamic performance bounds for radiative heat engines
Maxime Giteau, Michela F. Picardi, and Georgia T. Papadakis
Phys. Rev. Applied 20, L061003 (2023) – Published 20 December 2023

Heat engines capable of delivering both high power output and high efficiency are earnestly sought after, but a fundamental trade-off generally exists between the two metrics. This study highlights the exact nature of this trade-off for engines that exchange heat radiatively with a hot source. The authors also show that this trade-off is less restrictive compared to linear heat engines, especially at high temperatures. This work is particularly relevant for thermophotovoltaics, offering a complete characterization of their performance bounds.

Show Abstract 
Condensed Matter Physics
Energy Research
Statistical Physics
PDFHTML
Letter
Three-photon Rydberg-atom-based radio-frequency sensing scheme with narrow linewidth
Stephanie M. Bohaichuk, Fabian Ripka, Vijin Venu, Florian Christaller, Chang Liu, Matthias Schmidt, Harald Kübler, and James P. Shaffer
Phys. Rev. Applied 20, L061004 (2023) – Published 21 December 2023

The self-calibration of rf sensors using Rydberg-atom vapor cells is a major advantage over conventional rf antennas, but has been limited by Doppler broadening. In this study, ultranarrow linewidths comparable to those in ultracold gases are obtained in a room-temperature vapor cell, by overcoming Doppler shifts via a three-photon scheme to reduce the spectral linewidth to less than 200 kHz. This narrow linewidth extends the self-calibrated regime of such sensors by over an order of magnitude, compared to what has been achieved in standard two-photon schemes.

Show Abstract 
Optoelectronics
Quantum Physics
PDFHTML
ARTICLES
Radiative carrier lifetime in 
Ge
1
−
x
Sn
x
 midinfrared emitters
Gérard Daligou, Anis Attiaoui, Simone Assali, Patrick Del Vecchio, and Oussama Moutanabbir
Phys. Rev. Applied 20, 064001 (2023) – Published 1 December 2023
Show Abstract 
Condensed Matter Physics
Optoelectronics
Semiconductor Physics
PDFHTML
Robust superresolution computational imaging with diffuser-refined illumination
Xinliang Zhai, Xiaoyan Wu, Tailong Xiao, Jianhong Shi, and Guihua Zeng
Phys. Rev. Applied 20, 064002 (2023) – Published 1 December 2023
Show Abstract 
Optics
PDFHTML
Holographic surface-acoustic-wave tweezers for functional manipulation of solid or liquid objects
Peng-Qi Li, Wei Zhou, Benxian Peng, Chunqiu Zhang, Xue-Feng Zhu, Long Meng, and Hairong Zheng
Phys. Rev. Applied 20, 064003 (2023) – Published 1 December 2023
Show Abstract 
Acoustics
Fluid Dynamics
Metamaterials
PDFHTML
Droplets as force gauges on hydrophobic surfaces
Juan V. Escobar
Phys. Rev. Applied 20, 064004 (2023) – Published 4 December 2023
Show Abstract 
Fluid Dynamics
Mechanics
Soft Matter
PDFHTML
Editors' Suggestion
Longitudinal coupling between a 
Si
/
Si
1
−
x
Ge
x
 double quantum dot and an off-chip 
Ti
N
 resonator
J. Corrigan, Benjamin Harpt, Nathan Holman, Rusko Ruskov, Piotr Marciniec, D. Rosenberg, D. Yost, R. Das, William D. Oliver, R. McDermott, Charles Tahan, Mark Friesen, and M.A. Eriksson
Phys. Rev. Applied 20, 064005 (2023) – Published 4 December 2023

Far-off-resonant couplings are useful in quantum computing because they do not require special tunings of device components, but still await further exploration. The authors use a “flip-chip” coupling geometry to unequivocally demonstrate the presence of a far-off-resonant longitudinal coupling between a quantum-dot charge qubit and a microwave cavity, which can be turned on or off at will. This work provides a powerful and versatile tool for reading out and coupling quantum-dot qubits over large distances.

Show Abstract 
Quantum Information
Semiconductor Physics
Superconductivity
PDFHTML
Quantitative analysis of magnon characteristics with unidirectional magnetoresistance
Nyun Jong Lee, Heechan Jang, Eunkang Park, Ki-Seung Lee, Seyeop Jeong, Soogil Lee, Byong-Guk Park, Chun-Yeol You, Kyoung-Whan Kim, and Sanghoon Kim
Phys. Rev. Applied 20, 064006 (2023) – Published 5 December 2023
Show Abstract 
Magnetism
Spintronics
PDFHTML
Adaptive quantum tomography in an indistinct measurement system with superconducting circuits
Hyeok Hwang, JaeKyung Choi, and Eunseong Kim
Phys. Rev. Applied 20, 064007 (2023) – Published 5 December 2023
Show Abstract 
Optoelectronics
Quantum Information
Superconductivity
PDFHTML
Anisotropic resistivity tensor from disk geometry magnetoconductance
Oskar Vafek
Phys. Rev. Applied 20, 064008 (2023) – Published 6 December 2023
Show Abstract 
Electronics
Magnetism
Nanophysics
PDFHTML
Photonic topological states induced by local non-Hermitian modulation
Zhihua Deng, Dingshan Gao, Jianji Dong, and Xinliang Zhang
Phys. Rev. Applied 20, 064009 (2023) – Published 6 December 2023
Show Abstract 
Photonics
Topological Insulators
PDFHTML
Photoresponse mediated by exciton-plasmon coupling in two-dimensional hybrid phototransistors
Shubhrasish Mukherjee, Didhiti Bhattacharya, Samit Kumar Ray, and Atindra Nath Pal
Phys. Rev. Applied 20, 064010 (2023) – Published 6 December 2023
Show Abstract 
Nanophysics
Optoelectronics
Semiconductor Physics
PDFHTML
Magnetoelectric coupling and cross control in two-dimensional ferromagnets
Fan Wang, Ying Zhou, Xiaofan Shen, Shuai Dong, and Junting Zhang
Phys. Rev. Applied 20, 064011 (2023) – Published 7 December 2023
Show Abstract 
Condensed Matter Physics
Nanophysics
Spintronics
PDFHTML
Editors' Suggestion
Superresolution magnetic imaging by a Josephson junction via holographic reconstruction of 
I
c
(
H
)
 modulation
Razmik A. Hovhannisyan, Taras Golod, and Vladimir M. Krasnov
Phys. Rev. Applied 20, 064012 (2023) – Published 7 December 2023

Magnetic sensors generally exhibit a trade-off between spatial resolution and field sensitivity: As sensor size decreases, resolution improves but sensitivity deteriorates. This study reveals that the field distribution in a superconducting Josephson junction can be inferred by analyzing the diffractionlike magnetic field modulation of the critical current 
I
c
. Here the spatial resolution is constrained solely by the field range of the 
I
c
(
H
)
 pattern and is unrelated to the junction’s size. A remarkable feature of this detection method is that high spatial resolution accompanies high field sensitivity.

Show Abstract 
Magnetism
Nanophysics
Superconductivity
PDFHTML
Monolithic polarizing circular dielectric gratings on bulk substrates for improved photon collection from 
In
As
 quantum dots
Ryan A. DeCrescent, Zixuan Wang, Poolad Imany, Sae Woo Nam, Richard P. Mirin, and Kevin L. Silverman
Phys. Rev. Applied 20, 064013 (2023) – Published 7 December 2023
Show Abstract 
Optoelectronics
Photonics
Semiconductor Physics
PDFHTML
Featured in Physics Editors' Suggestion
Acoustic cloning
Jonas Müller, Theodor S. Becker, Xun Li, Johannes Aichele, Marc Serra-Garcia, Johan O.A. Robertsson, and Dirk-Jan van Manen
Phys. Rev. Applied 20, 064014 (2023) – Published 8 December 2023
Physics logo Focus: Creating an Audio “Hallucination”

You might hear an echo in the mountains, but can you hear your voice reflecting from the mug on your desk? Probably not: The intensity of that reflected sound is negligible, compared to the other reflections in your office…and what if we put out more mugs? Acoustic cloning, a form of holography, allows us to study acoustic wave propagation and reflection from a physical scatterer, even with modifications to that object. This study presents both theoretical framework and experimental implementation. The method is expected to be widely applicable in all domains of acoustic scattering, such as material characterization, active metamaterials, and virtual-acoustics applications.

Show Abstract 
Acoustics
Metamaterials
PDFHTML
High-performance near-field thermophotovoltaics based on a 
Ca
CO
3
/
graphene
/
In
Sb
 heterostructure
Lin Li, Kun Yu, Dudong Feng, Zhimin Yang, Kaihua Zhang, Yufang Liu, and Xiaohu Wu
Phys. Rev. Applied 20, 064015 (2023) – Published 8 December 2023
Show Abstract 
Energy Research
Graphene
Optoelectronics
Semiconductor Physics
PDFHTML
Quantum optimal control without arbitrary waveform generators
Qi-Ming Chen, Herschel Rabitz, and Re-Bing Wu
Phys. Rev. Applied 20, 064016 (2023) – Published 8 December 2023
Show Abstract 
Optoelectronics
Quantum Information
Superconductivity
PDFHTML
Large-area photon calorimeter with Ir-Pt bilayer transition-edge sensor for the CUPID experiment
V. Singh, M. Beretta, E.V. Hansen, K.J. Vetter, G. Benato, L. Marini, C. Capelli, B.K. Fujikawa, B. Schmidt, C.L. Chang, Yu.G. Kolomensky, B. Welliver, W.K. Kwok, J. Pearson, U. Welp, M. Lisovenko, G. Wang, V. Yefremenko, J. Zhang, and V. Novosad
Phys. Rev. Applied 20, 064017 (2023) – Published 11 December 2023
Show Abstract 
Nuclear Physics
Optoelectronics
Particles and Fields
PDFHTML
Spectral flow of a localized mode in elastic media
Marco Miniaci, Florian Allein, and Raj Kumar Pal
Phys. Rev. Applied 20, 064018 (2023) – Published 11 December 2023
Show Abstract 
Acoustics
Mechanics
Metamaterials
PDFHTML
Optomechanical Coupling and Damping of a Carbon Nanotube Quantum Dot
N. Hüttner, S. Blien, P. Steger, A.N. Loh, R. Graaf, and A.K. Hüttel
Phys. Rev. Applied 20, 064019 (2023) – Published 11 December 2023
Show Abstract 
Mechanics
Nanophysics
Optoelectronics
PDFHTML
Multimode Nonlinear Dynamics of Graphene Resonators
Ata Keşkekler, Vincent Bos, Alejandro M. Aragón, Peter G. Steeneken, and Farbod Alijani
Phys. Rev. Applied 20, 064020 (2023) – Published 12 December 2023
Show Abstract 
Graphene
Mechanics
Nonlinear Dynamics
PDFHTML
Skyrmion automotion and readout in confined counter-sensor device geometries
Kilian Leutner, Thomas Brian Winkler, Raphael Gruber, Robert Frömter, Johannes Güttinger, Hans Fangohr, and Mathias Kläui
Phys. Rev. Applied 20, 064021 (2023) – Published 12 December 2023
Show Abstract 
Computational Physics
Magnetism
Spintronics
PDFHTML
Resonance cascading in a ceramic tag for long-range omnidirectional radio-frequency identification communication
Dmitry Dobrykh, Alyona Maksimenko, Ildar Yusupov, Dmitry Filonov, Alexey Slobozhanyuk, and Pavel Ginzburg
Phys. Rev. Applied 20, 064022 (2023) – Published 12 December 2023
Show Abstract 
Industrial Physics
Optoelectronics
PDFHTML
Quantitative analysis of polarization behaviors of trion states in monolayer 
WS
2
 in a magnetic field
Zijing Jin, Baikui Li, Guanghui Cheng, Chengjie Zhou, Hui Li, and Jiannong Wang
Phys. Rev. Applied 20, 064023 (2023) – Published 13 December 2023
Show Abstract 
Nanophysics
Optoelectronics
Semiconductor Physics
PDFHTML
Electron paramagnetic resonance of n-type semiconductors for applications in three-dimensional thermometry
Darshan Chalise and David G. Cahill
Phys. Rev. Applied 20, 064024 (2023) – Published 13 December 2023
Show Abstract 
Industrial Physics
Magnetism
Semiconductor Physics
PDFHTML
Optimal Flight-Gate Assignment on a Digital Quantum Computer
Yahui Chai, Lena Funcke, Tobias Hartung, Karl Jansen, Stefan Kühn, Paolo Stornati, and Tobias Stollenwerk
Phys. Rev. Applied 20, 064025 (2023) – Published 13 December 2023
Show Abstract 
Industrial Physics
Quantum Information
PDFHTML
Broadband acoustic metalaser for continuous sine waves and pulses
Xudong Fan, Qi Jin, Haicai Xiao, Yang Kang, Xiaolong Huang, Can Li, Ning Li, and Chunsheng Weng
Phys. Rev. Applied 20, 064026 (2023) – Published 14 December 2023
Show Abstract 
Acoustics
Metamaterials
PDFHTML
Dynamical decoupling for superconducting qubits: A performance survey
Nic Ezzell, Bibek Pokharel, Lina Tewala, Gregory Quiroz, and Daniel A. Lidar
Phys. Rev. Applied 20, 064027 (2023) – Published 14 December 2023
Show Abstract 
Optoelectronics
Quantum Information
Superconductivity
PDFHTML
Quantum-enhanced electrometer based on microwave-dressed Rydberg atoms
Shuhe Wu, Dong Zhang, Zhengchun Li, Minwei Shi, Peiyu Yang, Jinxian Guo, Wei Du, Guzhi Bao, and Weiping Zhang
Phys. Rev. Applied 20, 064028 (2023) – Published 15 December 2023
Show Abstract 
Optics
Photonics
Quantum Physics
PDFHTML
Editors' Suggestion
Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low excitation power triplet-triplet annihilation
Andrei Stankevych, Rishabh Saxena, Jeannine Grüne, Sebastian Lulei, Andreas Sperlich, Stavros Athanasopoulos, Alexander Vakhnin, Prakhar Sahay, Wolfgang Brütting, Vladimir Dyakonov, Heinz Bässler, Anna Köhler, and Andrey Kadashchuk
Phys. Rev. Applied 20, 064029 (2023) – Published 15 December 2023

This work demonstrates that triplet-triplet annihilation (TTA) is the predominant mechanism of intrinsic photogeneration of charge-carrier pairs via autoionization, in a single-component disordered organic system with no heavy atoms. The findings challenge established beliefs by revealing efficient carrier generation via TTA upon excitation near the absorption edge. Photocurrent measurements, optical spectroscopy, and spin-sensitive techniques support this model of bimolecular charge generation. Such mechanisms in organic semiconductors are relevant not just for OLEDs, but also for long-persistent luminescence, photovoltaics, and potentially for photocatalytic water splitting.

Show Abstract 
Energy Research
Optoelectronics
Semiconductor Physics
PDFHTML
Gradient-based optimization of permanent-magnet assemblies for any objective
Andrea Roberto Insinga and Rasmus Bjørk
Phys. Rev. Applied 20, 064030 (2023) – Published 15 December 2023
Show Abstract 
Computational Physics
Energy Research
Magnetism
PDFHTML
Imperfect phase randomization and generalized decoy-state quantum key distribution
Shlok Nahar, Twesh Upadhyaya, and Norbert Lütkenhaus
Phys. Rev. Applied 20, 064031 (2023) – Published 18 December 2023
Show Abstract 
Optics
Quantum Information
PDFHTML
Polarization-entangled quantum frequency comb from a silicon nitride microring resonator
Wenjun Wen, Wenhan Yan, Chi Lu, Liangliang Lu, Xiaoyu Wu, Yanqing Lu, Shining Zhu, and Xiao-Song Ma
Phys. Rev. Applied 20, 064032 (2023) – Published 18 December 2023
Show Abstract 
Photonics
Quantum Information
Semiconductor Physics
PDFHTML
Emerging current-voltage plateaus caused by high internal electric potentials in interband cascade photodetectors
A. Bader, F. Rothmayr, N. Khan, J. Koeth, A. Pfenning, G. Bastard, S. Höfling, and F. Hartmann
Phys. Rev. Applied 20, 064033 (2023) – Published 18 December 2023
Show Abstract 
Optoelectronics
Semiconductor Physics
PDFHTML
Excitation of maximal degeneracy and higher-order topology in phononic crystals
Hailong He, Zhenhang Pu, Qiyun Ma, Ze Dong, Liping Ye, Manzhu Ke, and Zhengyou Liu
Phys. Rev. Applied 20, 064034 (2023) – Published 19 December 2023
Show Abstract 
Acoustics
Metamaterials
PDFHTML
Editors' Suggestion
Ionization clamping in ultrafast optical breakdown of transparent solids
Anton Rudenko, Jerome V. Moloney, and Pavel Polynkin
Phys. Rev. Applied 20, 064035 (2023) – Published 19 December 2023

Internal modifications of transparent solid-state materials by intense, ultrashort laser pulses enable numerous applications in micromachining, photonics, and medicine. Understanding the highly nonlinear propagation of the laser beam through the interaction zone is important in developing these technologies. Here a comprehensive propagation model reveals that even under extremely tight focusing, the key physical quantities are rigidly clamped by plasma shielding, at values up to two orders of magnitude lower than those inferred from earlier studies. Potential routes to overcome the clamping limits are discussed.

Show Abstract 
Materials Science
Optics
Plasma Physics
PDFHTML
Topological acoustics with orbital-dependent gauge fields
Feng Gao, Yu-Gui Peng, Qi-Li Sun, Xiao Xiang, Chen Zheng, and Xue-Feng Zhu
Phys. Rev. Applied 20, 064036 (2023) – Published 20 December 2023
Show Abstract 
Acoustics
Metamaterials
Topological Insulators
PDFHTML
Tunable coupler to fully decouple and maximally localize superconducting qubits
Lukas Heunisch, Christopher Eichler, and Michael J. Hartmann
Phys. Rev. Applied 20, 064037 (2023) – Published 20 December 2023
Show Abstract 
Optoelectronics
Quantum Information
Superconductivity
PDFHTML
Passive and active neutron signatures of 
233
U
 for nondestructive assay
Oskar Searfus, Peter Marleau, Eva Uribe, Heather Reedy, and Igor Jovanovic
Phys. Rev. Applied 20, 064038 (2023) – Published 21 December 2023
Show Abstract 
Energy Research
Materials Science
Nuclear Physics
PDFHTML
Laboratory-based x-ray dark-field microscopy
Michela Esposito, Ian Buchanan, Lorenzo Massimi, Joseph D. Ferrara, Paul R. Shearing, Alessandro Olivo, and Marco Endrizzi
Phys. Rev. Applied 20, 064039 (2023) – Published 21 December 2023
Show Abstract 
Materials Science
Medical Physics
Optics
PDFHTML
Using Cascade in quantum key distribution
Devashish Tupkary and Norbert Lütkenhaus
Phys. Rev. Applied 20, 064040 (2023) – Published 22 December 2023
Show Abstract 
Quantum Information
PDFHTML
Editors' Suggestion
Neural sensing and control in a kilometer-scale gravitational-wave observatory
N. Mukund, J. Lough, A. Bisht, H. Wittel, S. Nadji, C. Affeldt, F. Bergamin, M. Brinkmann, V. Kringel, H. Lück, M. Weinert, and K. Danzmann
Phys. Rev. Applied 20, 064041 (2023) – Published 22 December 2023

Aligning suspended optics in gravitational-wave observatories is crucial for detecting astrophysical phenomena⏤and it is also challenging, due to several environmental factors. This research implements neural-network-based sensing and control deployed at the GEO600 detector, utilizing a sensor with a convolutional neural network and long- and short-term memory, plus a deep-reinforcement-learning-based agent for enhanced alignment. The method demonstrates sensitivity improvement over traditional schemes, thus offering a practical approach for AI-based real-time control of gravitational-wave interferometers, to aid the detection of cosmic events like merging compact neutron-star binaries.

Show Abstract 
Astrophysics
Computational Physics
Optics
PDFHTML
Large-chiral-number corner modes in 
Z
-class higher-order topolectrical circuits
Yi Li, Jia-Hui Zhang, Feng Mei, Biye Xie, Ming-Hui Lu, Jie Ma, Liantuan Xiao, and Suotang Jia
Phys. Rev. Applied 20, 064042 (2023) – Published 22 December 2023
Show Abstract 
Electronics
Topological Insulators
PDFHTML
Hall mobilities and sheet carrier densities in a single 
Li
Nb
O
3
 conductive ferroelectric domain wall
Henrik Beccard, Elke Beyreuther, Benjamin Kirbus, Samuel D. Seddon, Michael Rüsing, and Lukas M. Eng
Phys. Rev. Applied 20, 064043 (2023) – Published 26 December 2023
Show Abstract 
Condensed Matter Physics
Materials Science
Optoelectronics
PDFHTML
Monolayer 
WSi
2
N
4
: A promising channel material for sub-5-nm-gate homogeneous CMOS devices
Ying Li, Chunyu Qi, Xun Zhou, Linqiang Xu, Qiuhui Li, Shiming Liu, Chen Yang, Shiqi Liu, Lin Xu, Jichao Dong, Shibo Fang, Zongmong Yang, Yifan Chen, Xiaotian Sun, and Jing Lu
Phys. Rev. Applied 20, 064044 (2023) – Published 26 December 2023
Show Abstract 
Nanophysics
Optoelectronics
Semiconductor Physics
PDFHTML
Editors' Suggestion
Injection mechanisms in a III-nitride light-emitting diode as seen by self-emissive electron microscopy
Tanay Tak, Cameron W. Johnson, Wan Ying Ho, Feng Wu, Mylène Sauty, Steve Rebollo, Andreas K. Schmid, Jacques Peretti, Yuh-Renn Wu, Claude Weisbuch, and James S. Speck
Phys. Rev. Applied 20, 064045 (2023) – Published 26 December 2023

While charge carriers in electronics are fundamental to device operation, little is empirically known about their spatial distribution under standard operating conditions. The authors develop a technique for self-emissive electron microscopy that allows them to image electrons close to their point of generation in operando. Increased electron emission, and thus carrier density, is observed at the ridges of V-shaped defects in a green LED, confirming that the sidewalls of these defects allow lateral carrier injection⏤a necessity for increasing efficiency. Measuring the spatial distribution of carriers with this technique can inform the design of superior devices.

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Energy Research
Optoelectronics
Semiconductor Physics
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Fundamental Limits on Subwavelength Range Resolution
Andrew N. Jordan and John C. Howell
Phys. Rev. Applied 20, 064046 (2023) – Published 27 December 2023
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Optics
Quantum Physics
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Unconventional surface responses of fourfold-degenerate Dirac-nodal-line semimetals in sonic crystals
Chang-Yin Ji, Jijie Tang, Xiao-Ping Li, Zheng Tang, Di Zhou, Yeliang Wang, Feng Li, Jiafang Li, and Yugui Yao
Phys. Rev. Applied 20, 064047 (2023) – Published 28 December 2023
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Acoustics
Metamaterials
Topological Insulators
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Nanodevices from and electronic transport properties of 
Zr
I
2
 monolayers
Juncai Chen, Yongliang Guo, Xiaozheng Fan, Yilian Li, Yi Wu, Chunlan Ma, Shijing Gong, Xiao Dong, Tianxing Wang, Guoliang Xu, and Yipeng An
Phys. Rev. Applied 20, 064048 (2023) – Published 28 December 2023
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Nanophysics
Optoelectronics
Semiconductor Physics
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Increased light-emission efficiency in disordered 
(
In
,
Ga
)
N
 through the correlated reduction of recombination rates
Nick Pant and Emmanouil Kioupakis
Phys. Rev. Applied 20, 064049 (2023) – Published 29 December 2023
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Energy Research
Optoelectronics
Semiconductor Physics
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Layer-dependent switching and photodetection in two-dimensional 
In
Se
 transistors
Lin Li, Peize Yuan, Zinan Ma, Mengjie He, Yurong Jiang, Tianxing Wang, Xueping Li, and Congxin Xia
Phys. Rev. Applied 20, 064050 (2023) – Published 29 December 2023
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Nanophysics
Optoelectronics
Semiconductor Physics