Optical nonlinearity goes ultrafast in 2D semiconductor-based nanocavities Armando GencoGiulio Cerullo News & Views Open Access 07 May 2022 Terahertz near-field microscopy based on an air-plasma dynamic aperture A THz near-field technique was proposed based on an air-plasma dynamic aperture, which can achieve sub-wavelength THz imaging without approaching the sample with any devices. Xin-ke WangJia-sheng YeYan Zhang Article Open Access 07 May 2022 An Optoelectronic thermometer based on microscale infrared-to-visible conversion devices A thermosensitive optoelectronic upconversion device based on integrated microscale LED and photodiode structures, with temperature dependent of spectral shift and intensity change. He DingGuoqing LvXing Sheng Article Open Access 07 May 2022 Physics and applications of Raman distributed optical fiber sensing This paper review recent advances in Raman distributed optical fiber sensing in terms of temperature measurement accuracy, spatial resolution, dual-parameters and applications. Jian LiMingjiang Zhang Review Article Open Access 07 May 2022 Luminescent concentrators enable highly efficient and broadband photodetection Wei WangJohnny C. Ho News & Views Open Access 06 May 2022 Closing the THz gap with Dirac semimetals Carlo RizzaAlessandro Molle News & Views Open Access 06 May 2022 A metasurface-based light-to-microwave transmitter for hybrid wireless communications A metasurface-based light-to-microwave transmitter, which can convert a light intensity signal to two microwave signals directly, was proposed to achieve the dual-channel data transmissions in light-to-microwave hybrid wireless communications. Xin Ge ZhangYa Lun SunTie Jun Cui Article Open Access 06 May 2022 Persistent X-ray-activated phosphors: mechanisms and applications Cyrille RichardBruno Viana News & Views Open Access 04 May 2022 LOEN: Lensless opto-electronic neural network empowered machine vision This work highly decreases the size, power, and computation for machine vision with novel joint-optimized opto-electronic neural networks. Wanxin ShiZheng HuangHongwei Chen Article Open Access 04 May 2022 Color-preserving passive radiative cooling for an actively temperature-regulated enclosure Yining ZhuHao LuoQiang Li