A broadband gas sensing technology is reported.The measurement principle relies on Fourier transform photoacoustic spectroscopy(FT-PAS)using a differential photoacoustic cell,in which both phase modulation and amplitu...A broadband gas sensing technology is reported.The measurement principle relies on Fourier transform photoacoustic spectroscopy(FT-PAS)using a differential photoacoustic cell,in which both phase modulation and amplitude modulation are simultaneously applied to the broadband light sources.The thermal light source and supercontinuum source are employed sequentially.The performance of the FT-PAS is demonstrated by measuring the spectra of methane in the2–10μm range and acetylene in the 1–2μm range.By leveraging the wavelength-independent nature of the photoacoustic effect,this system holds promise for comprehensive full-spectrum spectral detection.展开更多
Interests surrounding the development of on-chip nonlinear optical devices have been consistently growing in the past decades due to the tremendous applications,such as quantum photonics,all-optical communications,opt...Interests surrounding the development of on-chip nonlinear optical devices have been consistently growing in the past decades due to the tremendous applications,such as quantum photonics,all-optical communications,optical computing,on-chip metrology,and sensing.Developing efficient on-chip nonlinear optical devices to meet the requirements of those applications brings the need for new directions to improve the existing photonic approaches.Recent research has directed the field of on-chip nonlinear optics toward the hybrid integration of two-dimensional layered materials(such as graphene,transition metal dichalcogenides,and black phosphorous)with various integrated platforms.The combination of well-known photonic chip design platforms(e.g.,silicon,silicon nitride)and different two-dimensional layered materials has opened the road for more versatile and efficient structures and devices,which has the great potential to unlock numerous new possibilities.This review discusses the modeling and characterization of different hybrid photonic integration structures with two-dimensional materials,highlights the current state of the art examples,and presents an outlook for future prospects.展开更多
基金supported by the National Natural Science Foundation of China(NSFC)(Nos.62235010,62175137,62122045,and 62075119)Shanxi Science Fund for Distinguished Young Scholars(No.20210302121003)Shanxi Provincial Special Fund for Scientific and Technological Cooperation and Exchange(No.202304041101019)。
文摘A broadband gas sensing technology is reported.The measurement principle relies on Fourier transform photoacoustic spectroscopy(FT-PAS)using a differential photoacoustic cell,in which both phase modulation and amplitude modulation are simultaneously applied to the broadband light sources.The thermal light source and supercontinuum source are employed sequentially.The performance of the FT-PAS is demonstrated by measuring the spectra of methane in the2–10μm range and acetylene in the 1–2μm range.By leveraging the wavelength-independent nature of the photoacoustic effect,this system holds promise for comprehensive full-spectrum spectral detection.
基金supported by Paris Saclay University within the Centre for Nanoscience and Nanotechnology(C2N)in France and Aalto University in Finland.ZS thanks fundings from the Academy of Finland(314810,333982,336144,336818,352780,353364)the Academy of Finland Flagship Programme(320167,PREIN)the EU H2020-MSCA-RISE-872049(IPN-Bio),and ERC(834742).
文摘Interests surrounding the development of on-chip nonlinear optical devices have been consistently growing in the past decades due to the tremendous applications,such as quantum photonics,all-optical communications,optical computing,on-chip metrology,and sensing.Developing efficient on-chip nonlinear optical devices to meet the requirements of those applications brings the need for new directions to improve the existing photonic approaches.Recent research has directed the field of on-chip nonlinear optics toward the hybrid integration of two-dimensional layered materials(such as graphene,transition metal dichalcogenides,and black phosphorous)with various integrated platforms.The combination of well-known photonic chip design platforms(e.g.,silicon,silicon nitride)and different two-dimensional layered materials has opened the road for more versatile and efficient structures and devices,which has the great potential to unlock numerous new possibilities.This review discusses the modeling and characterization of different hybrid photonic integration structures with two-dimensional materials,highlights the current state of the art examples,and presents an outlook for future prospects.
