With the epidemic of the coronavirus disease(COVID-19) infection, AlGaN-based ultraviolet-C light emitting diodes(UVC-LEDs) have attracted widespread attention for their sterilization application. However, the sterili...With the epidemic of the coronavirus disease(COVID-19) infection, AlGaN-based ultraviolet-C light emitting diodes(UVC-LEDs) have attracted widespread attention for their sterilization application. However, the sterilization characters of high power integrated light sources(ILSs) haven’t been widely investigated before utilizing in public sanitary security. In this work,by integrating up to 195 UVC-LED chips, high power UVC-LED ILSs with a light output power(LOP) of 1.88 W were demonstrated. The UVC-LED ILSs were verified to have efficient and rapid sterilization capability, which have achieved more than99.9% inactivation rate of several common pathogenic microorganisms within 1 s. In addition, the corresponding air sterilization module based on them was also demonstrated to kill more than 97% of Staphylococcus albus in the air of 20 m3 confined room within 30 min. This work demonstrates excellent sterilization ability of UVC-LED ILSs with high LOP, revealing great potential of UVC-LEDs in sterilization applications in the future.展开更多
Integrated photonic gyroscopes(IPGs)have emerged as a promising alternative to other gyroscopes,providing high sensitivity,compactness,and low power consumption,especially being more conducive to integration.In this r...Integrated photonic gyroscopes(IPGs)have emerged as a promising alternative to other gyroscopes,providing high sensitivity,compactness,and low power consumption,especially being more conducive to integration.In this review,we discuss recent advances in IPG technology and research,including the different types of IPGs currently being developed,such as waveguide spiral-based,ring laser gyroscope,and passive ring resonator based IPGs.We highlight the efforts dedicated to improve the stability,accuracy,and resolution of IPGs,such as using narrow-band laser diodes and using a high-stability,low-noise power supply system.Additionally,we provide an overview of the key performance measures of IPGs,including resolution,drifting,stability,noise cancellation as well as their interrelationships.Finally,we discuss challenges and future directions for the IPG research,including improving long-term stability and addressing sensitivity to shock and vibrations.展开更多
基金supported by the Guangdong Basic and Application Basic Research Foundation of Guangdong Province (Nos. 2021A1515111149, 2021B1515120022, 2020B 010174003)。
文摘With the epidemic of the coronavirus disease(COVID-19) infection, AlGaN-based ultraviolet-C light emitting diodes(UVC-LEDs) have attracted widespread attention for their sterilization application. However, the sterilization characters of high power integrated light sources(ILSs) haven’t been widely investigated before utilizing in public sanitary security. In this work,by integrating up to 195 UVC-LED chips, high power UVC-LED ILSs with a light output power(LOP) of 1.88 W were demonstrated. The UVC-LED ILSs were verified to have efficient and rapid sterilization capability, which have achieved more than99.9% inactivation rate of several common pathogenic microorganisms within 1 s. In addition, the corresponding air sterilization module based on them was also demonstrated to kill more than 97% of Staphylococcus albus in the air of 20 m3 confined room within 30 min. This work demonstrates excellent sterilization ability of UVC-LED ILSs with high LOP, revealing great potential of UVC-LEDs in sterilization applications in the future.
基金supported by the National Natural Science Foundation of China(Grant Nos.62293495 and 62201021)the Young Elite Scientists Sponsorship Program(Grant No.2023QNRC001).
文摘Integrated photonic gyroscopes(IPGs)have emerged as a promising alternative to other gyroscopes,providing high sensitivity,compactness,and low power consumption,especially being more conducive to integration.In this review,we discuss recent advances in IPG technology and research,including the different types of IPGs currently being developed,such as waveguide spiral-based,ring laser gyroscope,and passive ring resonator based IPGs.We highlight the efforts dedicated to improve the stability,accuracy,and resolution of IPGs,such as using narrow-band laser diodes and using a high-stability,low-noise power supply system.Additionally,we provide an overview of the key performance measures of IPGs,including resolution,drifting,stability,noise cancellation as well as their interrelationships.Finally,we discuss challenges and future directions for the IPG research,including improving long-term stability and addressing sensitivity to shock and vibrations.
