High power laser technology has been developing since its emergence, it has been widely used in various fields. Accordingly, to avoid eyes and devices from high-power laser damage, the research on laser protection has also been paid great attention. The optical limiting technology based on the principle of nonlinear optics is one of the important technical means to realize laser protection.
Nanofluids (NFs) have been found to possess enhanced thermophysical properties compared to those of bare fluids like organic solvents or water. Since the first study was published in 1951, NFs have emerged as promising heat transport fluids with enhanced thermal conductivity in a wide range of technological applications, e.g. electronic cooling, solar water heating devices, nuclear reactors, radiators.
Compared with traditional color dyes, structural color has the advantages of high resolution and good stability, which can achieve full-tone modulation in the visible light range. All-dielectric metasurface structures are proposed to replace plasmonic metasurfaces with higher losses.
Adaptive optics (AO) system on the large ground-based telescope is widely used for resident space object (RSO) observation. As a common wavefront sensor for AO, the pyramid wavefront sensor (PyWFS) possesses advantages such as high sensitivity in closed-loop corrections and adjustable sampling in real-time operation, which makes it suitable for high-resolution imaging.
Autonomous driving technology put forward an urgent requirement for eye-safe light detection and ranging (LiDAR). The In0.53Ga0.47As/InP APD avalanche photodiodes (APDs) distinguished themselves with superior performances such as high internal gain, high reliability, and high sensitivity working in the band covering the eye-safe wavelength, making it one of the core devices for LiDAR system.
Micro-LEDs have been used in many fields due to their superior performance, such as micro-displays, visible light communication, optical biochips, wearable devices, and biosensors. Obtaining high resolution and high pixel density is one of the key technical challenges of working with micro-LED array displays, as it requires smaller and smaller chip sizes and pixel pitches.