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Shedding light on biology and healthcare—preface to the special issue on Biomedical Optics
This special issue collects 20 excellent papers, spanning NIR II imaging, high-speed imaging, adaptive wavefront shaping, label-free imaging, ultrasensitive detection, polarization optics, photodynamic therapy, and preclinical applications.

Peng XiXunbin WeiValery V. Tuchin
Editorial
Open Access
02 Jun 2022

Transport of intensity diffraction tomography with non-interferometric synthetic aperture for three-dimensional label-free microscopy
Jiaji LiNing ZhouChao Zuo
Article
Open Access
02 Jun 2022
Enhancing spatiotemporal focusing of light deep inside scattering media with Time-Gated Reflection Matrix
Zhipeng YuHuanhao LiPuxiang Lai
News & Views
Open Access
01 Jun 2022

Evidence for moiré intralayer excitons in twisted WSe2/WSe2 homobilayer superlattices
The moiré intralayer excitons in the twisted WSe2/WSe2 homobilayers superlattices were successfully observed and confirmed the existence of moiré intralayer excitons.

Biao WuHaihong ZhengYanping Liu
Article
Open Access
01 Jun 2022

Metamaterial-enabled arbitrary on-chip spatial mode manipulation
Jinlong XiangZhiyuan TaoYikai Su
Article
Open Access
01 Jun 2022

Mid-infrared III–V semiconductor lasers epitaxially grown on Si substrates
Eric TourniéLaura Monge BartolomeJean-Baptiste Rodriguez
Review Article
Open Access
01 Jun 2022
Discrimination of circular polarized light
Guangbo QuGuibin Jiang
Research Highlight
Open Access
30 May 2022

Graphene-driving novel strain relaxation towards AlN film and DUV photoelectronic devices
Graphene-driving strain-pre-store engineering enables the epitaxy of strain-free AlN film with low dislocation density for high efficiency DUV-LEDs.

Hieu. P. T. Nguyen
News & Views
Open Access
30 May 2022

Intrinsic superflat bands in general twisted bilayer systems
Hongfei WangShaojie MaDangyuan Lei
Article
Open Access
30 May 2022

Advanced liquid crystal devices for augmented reality and virtual reality displays: principles and applications
Advanced liquid crystal-based light engines and planar optical components play pivotal roles for systematically improving the image quality and formfactor of the augmented reality and virtual reality displays.

Kun YinEn-Lin HsiangShin-Tson Wu
Review Article
Open Access
30 May 2022

Halogen-doped phosphorescent carbon dots for grayscale patterning
Yanfeng LiuMahmoud Al-salihiJunle Qu
Article
Open Access
30 May 2022

Highly efficient green InP-based quantum dot light-emitting diodes regulated by inner alloyed shell component
In this work, the pure green-emitting InP/ZnSexS1−x/ZnS quantum dots and their light-emitting diodes with high efficiency were successfully obtained by regulating the components of inner alloyed shell ZnSexS1−x layer.

Peng YuSheng CaoJialong Zhao
Article
Open Access
30 May 2022

Bringing chiral functionality to in vivo applications of nanomaterials
Maria Mukhina
News & Views
Open Access
27 May 2022

Metasurface-enabled on-chip multiplexed diffractive neural networks in the visible
A polarization-multiplexed metasurface-enabled diffractive neural network, which is integrated with a CMOS imaging sensor, demonstrates on-chip multi-channel sensing and multitasking in the visible.

Xuhao LuoYueqiang HuHuigao Duan