Infrared Spectroscopy Selection And Asymmetric Transmission Characteristics Of Artificial Micro/nano Structures

Based on the artificial micro and nano structure,the main work of this paper is divided into three parts:the development of hyperfocal plane spectrometer,the development of asymmetric transmission grating and the development of radiation refrigeration device film system.Real-time accurate signal detection has shown a strong demand in military,civil,commercial and other fields.Under this background,the first part of this paper studies the application of micro-nano structure in real-time accurate detection.The main work is as follows:the design and fabrication of hyper-pixel focal plane spectrometer.Through the multi-channel design of plane array,the device can realize one-off light splitting,avoid the scanning process of linear splitters,and greatly accelerate the imaging speed.At the same time,this device can achieve the diversity of information acquisition.This paper describes the work and fabrication principle of the four-channel optical splitter of the medium-wave infrared 320×256 units focal plane hyperimage component in detail,and verifies the area array optical splitting function of the device.We also realize a 4-channel optical spectrometer with 32×4 cells.By designing the narrow band peak position of 4 channels at 3.89?m?4.07?m?4.26?m?4.4?m,the real-time detection of CO₂ is realized.Optical isolators are important devices that are widely used in optical communication.At present,optical isolators based on Faraday optical rotation or birefringence principle have a large volume.In the second part of this paper,the application of micro-nano structure in optical communication is studied,and an optical isolator based on asymmetric transmission of non-subwavelength dielectric grating is proposed.A novel optical functional device for unidirectional conduction of linear polarized light is designed and fabricated.Electricity refrigeration accounts for 15 percent of the world's total electricity generation,and with the development of the economy,this proportion is still growing further.In the third part of the thesis,the application of micro-nano structure in energy saving field is studied.The multilayer dielectric structure can effectively regulate the light at the wavelength of 0.4-14?m:the reflectivity of 0.4-2.5?m band is close to100%,the solar energy is not absorbed,and there is strong radiation in 8-14?m devices.Through numerical optimization method,we obtained the best cost effective membrane structure of Ag/SiO₂/TiO₂/SiO₂/TiO₂/SiO₂/Al₂O₃/SiO₂,the results provide reference for the implementation of efficient radiation refrigeration.