Article
Open Access
16 Jun 2023

Free-electron interactions with van der Waals heterostructures: a source of focused X-ray radiation
X-ray self-focusing sources are demonstrated by free electrons coherently interacting with van der Waals heterostructures, bypassing the need for X-ray optics that are often inefficient and challenging to fabricate.

Xihang ShiYaniv KurmanIdo Kaminer
Article
Open Access
16 Jun 2023

Single-mode quasi PT-symmetric laser with high power emission
The quasi PT-symmetry design enables the creation of electrically pumped large-area edge-emitting lasers with high power single-mode emissions by selectively inducing loss on high-order modes.

Enes ŞekerBabak OlyaeefarAbdullah Demir
Article
Open Access
16 Jun 2023

Ultra-thin light-weight laser-induced-graphene (LIG) diffractive optics
We present how direct-laser-writing can be utilized to fabricate ultra-thin light-weight planar diffractive optics with graphene as the base material. (Inset scale bar: 1 mm).

Younggeun LeeMun Ji LowYoung-Jin Kim
Review Article
Open Access
15 Jun 2023

Mid-infrared chemical imaging of intracellular tau fibrils using fluorescence-guided computational photothermal microscopy
Fluorescence-guided bond-selective intensity diffraction tomography is demonstrated to enable 3D hyperspectral chemical cellular imaging, site-specific mid-infrared spectroscopy, and 3D visualization of intracellular tau protein aggregates.

Jian ZhaoLulu JiangJi-Xin Cheng
Article
Open Access
15 Jun 2023

Electrically-pumped compact topological bulk lasers driven by band-inverted bound states in the continuum
Topological bulk BICs in the vicinity of inverted photonic band edges enable an electrically pumped, compact, single-mode, and beam engineered QCL to be operated at terahertz region.

Song HanJieyuan CuiQi Jie Wang
Article
Open Access
12 Jun 2023

Mid-infrared single-photon 3D imaging
Mid-infrared three-dimensional upconversion imaging is demonstrated based on the nonlinear optical gating, which favors desirable features of single-photon sensitivity, femtosecond temporal resolution, and wide-field capability.

Jianan FangKun HuangHeping Zeng
Article
Open Access
09 Jun 2023

Reconstructive spectrometers taper down in price
Xiaoqi CuiYi ZhangZhipei Sun
News & Views
Open Access
07 Jun 2023