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Dynamic Chiral Metasurfaces for Broadband Phase-Gradient Holographic Displays (Advanced Optical Materials 5/2023)
Taimoor Naeem,  Joohoon Kim,  Hafiz Saad Khaliq,  Junhwa Seong,  Muhammad Tariq Saeed Chani,  Tauseef Tauqeer,  Muhammad Qasim Mehmood,  Yehia Massoud,  Junsuk Rho
2370013 First Published: 03 March 2023
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Dynamic next-generation holography based on photonic integrated circuits (PICs) technology has significant potential in medical science, virtual reality, intelligent data security, and encryption, etc. The work presented by Yehia Massoud, Junsuk Rho, Muhammad Qasim Mehmood, and co-workers in article number 2202278 features a chiral metasurface integrated with a liquid crystal cell that provides dynamic phase-gradient holographic displays at broadband visible wavelengths. The designed metasurface is controlled by an externally applied voltage to reproduce spin-dependent switching holographic information.

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A Microphase Separation Strategy for the Infrared Transparency-Thermomechanical Property Conundrum in Sulfur-Rich Copolymers (Advanced Optical Materials 5/2023)
Jae Hyuk Hwang,  Sang Hwa Kim,  Woongbi Cho,  Woohwa Lee,  Sungmin Park,  Yong Seok Kim,  Jong-Chan Lee,  Kyung Jin Lee,  Jeong Jae Wie,  Dong-Gyun Kim
2370014 First Published: 03 March 2023
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In article number 2202432, Kyung Jin Lee, Jeong Jae Wie, Dong-Gyun Kim, and co-workers present an in-situ microphase separation strategy for the inverse vulcanization of elemental sulfur by utilizing self-crosslinkable 1,3,5-trivinylbenzene (TVB). Based on the microphase-separated architecture, poly(S-r-TVB)s exhibit robust thermomechanical properties, while still maintaining excellent infrared (IR) optical properties; such characteristics hold great promise for IR optical applications.

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Masthead
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Masthead: (Advanced Optical Materials 5/2023)
2370015 First Published: 03 March 2023
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Reviews
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Linear and Nonlinear Optical Properties of Well-Defined and Disordered Plasmonic Systems: A Review
Racheli Ron,  Tchiya Zar,  Adi Salomon
2201475 First Published: 18 December 2022
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Optical activity of 3D disordered plasmonic systems exhibits multiple hotspots over a broad optical range at subwavelength distances, very different from well-defined plasmonic systems. These metallic networks are robust, and have manifold sizes of pores enabling guest materials permeability, and therefore have the potential to function as an artificial leaf.

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Research Articles
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Anisotropic Nanoparticle Arrays Guided by Ordered Nanowire Films Enhance Surface-Enhanced Raman Scattering
Si-Zhe Sheng,  Shi-Qiao Zheng,  Xue-Fei Feng,  Ling-Ran Zhou,  Zhen-Chao Tao,  Jian-Wei Liu
2201682 First Published: 20 December 2022
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A new and interesting strategy for additional enhancements of surface-enhanced Raman scattering (SERS) properties is reported here by introducing the ordering design of the nano-building blocks (Au nanoparticle arrays using Te nanowire as template). This strategy of ordering-induced SERS performance enhancement can be readily extended to other systems (Au nanoparticles with different diameters) or using different kinds of probe molecules.

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Rising Stars
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Deformed Honeycomb Lattices of InGaAs Nanowires Grown on Silicon-on-Insulator for Photonic Crystal Surface-Emitting Lasers
Cristian Messina,  Yongkang Gong,  Oumaima Abouzaid,  Bogdan-Petrin Ratiu,  Tim Grieb,  Zhao Yan,  Andreas Rosenauer,  Sang Soon Oh,  Qiang Li
2201809 First Published: 20 December 2022
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A bottom-up InGaAs nanowire platform on silicon-on-insulator for photonic crystal surface-emitting lasers at telecom wavelengths is presented. The nanowires are arranged into deformed honeycomb lattices using lithographically defined selective area epitaxy. Room-temperature, low threshold lasing from both stretched and compressed honeycomb lattices is demonstrated. The potential of using the InGaAs nanowire-based honeycomb lattices for topological cavity lasers is discussed.

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Strongly Anisotropic Quasi-1D BaTiS3 Chalcogenide Perovskite for Near-Infrared Polarized Photodetection
Feifan Yang,  Kanghua Li,  Mingzhi Fan,  Wendian Yao,  Liuchong Fu,  Changying Xiong,  Shenglin Jiang,  Dehui Li,  Ming Xu,  Chao Chen,  Guangzu Zhang,  Jiang Tang
2201859 First Published: 23 December 2022
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The centimeter-length high-quality needle-like BaTiS3 single crystals are rapidly prepared in situ. For the first time, BaTiS3 progresses to the photodetector and the detection wavelength is reaching 1550 nm. Moreover, an interesting phenomenon of orthogonal reversal in polarization photocurrent under different excitation energies is first observed in crystalline materials, which makes polarization-wavelength selective detection possible.

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In-Plane Hyperbolic Phonon-Polaritons in van der Waals Nanocrystals
Jiawei Huang,  Lei Tao,  Ningning Dong,  Hongqiang Wang,  Song Zhou,  Jun Wang,  Xiaoyue He,  Kehui Wu
2202048 First Published: 22 December 2022
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Studies of the geometrical launching and propagating properties of polaritons are essential for advanced nanophotonic applications. Using a photon-induced force microscope over a broad spectral coverage in the mid-infrared, various styles of near-field patterns are explored in α-MoO3 upon a holey microcavity in its three Reststrahlen bands. A model based on elliptic-resonance cone with the orthogonal polariton momenta is employed to explain these phenomena.

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A Multifunctional Reconfigurable Absorber Enabled by Graphene and Shape Memory Alloy
Jinqiang Peng,  Ying She,  He Su,  Chen Ji,  Cheng Huang,  Xiangang Luo
2202125 First Published: 20 December 2022
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In this work, a novel multifunctional reconfigurable absorber is proposed, which can be flexibly switched among wideband absorption mode, frequency-reconfigurable narrowband absorption mode, and amplitude-controllable absorption mode. This absorber employs graphene for tuning its reflection magnitude, while a springs-using shape memory alloy (SMA) is adopted to support the whole absorber for dynamically controlling absorption frequency through height regulation.

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Daylong Sub-Ambient Radiative Cooling with Full-Color Exterior Based on Thermal Radiation and Solar Decoupling
Suwan Jeon,  Soomin Son,  Seokhwan Min,  Hyeonjin Park,  Heon Lee,  Jonghwa Shin
2202129 First Published: 22 December 2022
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Non-equilibrium radiative cooling scheme, which radiatively integrates and conductively decouples color and cooling parts, overcomes the previous trade-off between color diversity and radiative cooling performance. The limit of sub-ambient radiative cooling performance is substantially extended for all colors including black. The experimental results show daylong sub-ambient radiative cooling (average of ≈3.5 K cooling) with black and red exteriors.

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Precisely Confined AIEgens in Giant Imidazolium–Terpyridinyl Cuboctahedra with Enhanced Fluorescence for Single Supramolecule
Min-Ya Yu,  Yu-Ming Guan,  Qixia Bai,  Peiyang Su,  Pingshan Wang,  Ting-Zheng Xie
2202148 First Published: 20 December 2022
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To study the fluorescent behavior of quantitatively confined aggregation-induced emission (AIE) molecules in giant cavity, a new type of coordination-driven cuboctahedron cage is presented, with 12 AIE molecules anchored endohedrally linked with different-length alkyl chains. The cage with confined tetraphenylethylene molecules shows strong fluorescence in highly diluted condition with increased quantum yield upon prolonging the length of alkyl chains.

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Halide Perovskite Excitonic Diffraction Grating
Mariia P. Mamaeva,  Maksim S. Lozhkin,  Anna V. Shurukhina,  Boris V. Stroganov,  Alexei V. Emeline,  Yury V. Kapitonov
2202152 First Published: 22 December 2022
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Diffractive optical element based on fully inorganic halide perovskite CsPbBr3 is demonstrated. Spatial modulation of excitonic properties of the single crystal is achieved using local defect formation by focused ion irradiation with a low irradiation dose, which prevents the appearance of non-resonant diffraction since no sample milling occurs. The temperature, angular, and spectral properties of resonant diffraction are studied.

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Multiresponsive Dielectric Metasurfaces Based on Dual Light- and Temperature-Responsive Copolymers
Chengjun Zou,  Purushottam Poudel,  Sarah L. Walden,  Katsuya Tanaka,  Alexander Minovich,  Thomas Pertsch,  Felix H. Schacher,  Isabelle Staude
2202187 First Published: 23 December 2022
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Light and temperature-responsive polymers are integrated with asymmetric silicon metasurfaces for dual-responsive tuning of their transmittance. Reversible resonance shifts induced by light exposure, temperature changes or a combination of both stimuli are experimentally demonstrated. This work paves the way for multiresponsive metasurface components and is promising for multi-dimensional interactive smart optical devices.

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Hybrid Nanogels-Based Printable Tattoos Inspired by Lady Costume from Tang Dynasty for Monitoring Solar UV Radiation
Neng Hu,  Di Gao,  Xin Cai,  Lin Lei,  Weijia Wang,  Huiqing Fan,  Peter Müller-Buschbaum,  Qi Zhong
2202248 First Published: 27 December 2022
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Inspired by the decoration elements in the painting “Court Ladies Preparing Newly Woven Silk”, hybrid nanogels-based printable tattoos are designed to fulfill the aesthetic demands and UV radiation detection simultaneously. The UV radiation time and dose from sunshine can be directly monitored by checking the color of printable tattoos in real-time during outdoor activities.

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Multifunctional Fluorescent Materials with Reversible Mechanochromism and Distinct Photochromism
Weihua Luo,  Yiyuan Tang,  Xin Zhang,  Zhen Wu,  Guojie Wang
2202259 First Published: 19 December 2022
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Two intriguing aggregation-induced emission fluorogens (AIEgens) with reversible mechanochromism and dual-mode photochromism are prepared. Upon mechanical stimulation and solvent fuming, the AIEgens exhibit reversible changes in apparent and fluorescent colors. Under photo-irradiation, the AIEgens display various fluorescence characteristics in solution and aggregated state owing to photoisomerization and photodimerization. These fascinating properties have been explored for rewritable papers and photo-patterning.

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Dynamic Chiral Metasurfaces for Broadband Phase-Gradient Holographic Displays
Taimoor Naeem,  Joohoon Kim,  Hafiz Saad Khaliq,  Junhwa Seong,  Muhammad Tariq Saeed Chani,  Tauseef Tauqeer,  Muhammad Qasim Mehmood,  Yehia Massoud,  Junsuk Rho
2202278 First Published: 11 January 2023
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Next-generation holographic displays have promising applications in medical science, augmented/virtual reality, smart security, data encryption, etc. This work demonstrates a chiral metasurface integrated with a liquid crystal (LC) cell that provides dynamic phase-gradient holographic displays at braodband visible wavelengths. This research may pave the way toward designing highly efficient multifunctional metadevices to produce next-generation holographic displays.

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Super Broadband Near-Infrared Solid Solution Phosphors with Adjustable Peak Wavelengths from 1165 to 875 nm for NIR Spectroscopy Applications
Shuai Huang,  Yu Yan,  Mengmeng Shang,  Yining Wang,  Yixin Sun,  Peipei Dang,  Jun Lin
2202291 First Published: 20 December 2022
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In this work, novel blue light-emitting diode excitable ultra-broadband Cr3+-activated LiInGeO4 phosphors for spectroscopy detection are developed. The overall emission tuning from 1165 to 875 nm with broadened full-width at half maximum from 305 to 508 nm is realized through designing continuous solid solution hosts of LiIn1−zSczGeO4/(LiIn)1−yMg2yGeO4 and finite solid solution hosts of (LiIn)1−yZn2yGeO4:Cr3+.

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Highly Efficient Blue Thermally Activated Delayed Fluorescence Emitters with a Triphenylamine-Based Macrocyclic Donor
Chun-Yen Lin,  Chen-Han Lu,  Kai-Hua Kuo,  Miaosheng Wang,  Yipeng Tang,  Yixuan Dou,  Bin Hu,  Chung-Chih Wu,  Ken-Tsung Wong
2202292 First Published: 19 December 2022
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A triarylamine-based macrocyclic donor is adopted to design new blue thermally activated delayed fluorescence (TADF) emitter. The restricted conformation of macrocyclic donor twisting against the dimethyl substituted phenylene bridge leads to the reduced singlet–triplet energy difference (ΔEST) as well as the enhanced horizontal ratio of emission dipole. These beneficial effects contribute to a highly efficient blue TADF organic light-emitting diode.

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Spin-Selective Full and Subtle Light Intensity Manipulation with Diatomic Metasurfaces
Jiaqi Cheng,  Zhancheng Li,  Duk-Yong Choi,  Shiwang Yu,  Wenwei Liu,  Haoyu Wang,  Yuebian Zhang,  Hua Cheng,  Jianguo Tian,  Shuqi Chen
2202329 First Published: 18 December 2022
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Spin-selective full and subtle intensity manipulation of circularly polarized waves is numerically and experimentally realized by utilizing diatomic metasurfaces and simply changing one structural parameter. The potential application of the proposed diatomic metasurfaces in spin-selective high-resolution and high-level grayscale imaging has been demonstrated, promising further applications in advanced display and information encryption.

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