The single-slit diffraction experiment is a classic wave optics experiment,which is widely used to study light diffraction,interference phenomena,and wave characteristics.Combined with digital image processing technol...The single-slit diffraction experiment is a classic wave optics experiment,which is widely used to study light diffraction,interference phenomena,and wave characteristics.Combined with digital image processing technology,this paper proposes a micro-displacement measurement method based on single-slit diffraction patterns.A one-dimensional light intensity sensor is used to collect diffraction images in real time,and MATLAB platform is employed for image preprocessing and intensity distribution analysis,thereby efficiently extracting displacement-related parameters.Compared with traditional mechanical measurement methods,this method has the advantages of non-contact,high precision,and high sensitivity,and can provide a more reliable solution for the precise measurement of micro-displacement.Experimental results show that the diffraction method can accurately measure micro-displacement at the nanometer level,and has good consistency with traditional measurement methods.This paper also discusses the sources of errors in the experiment and puts forward improvement suggestions,providing valuable references for the development of micro-displacement measurement technology in the future.展开更多
A unidirectional surface plasmon polaritons(SPPs) generator with greatly enhanced generation efficiency is proposed. The SPPs generator consists of an asymmetric single nanoslit coated with a polyviny alcohol(PVA) fil...A unidirectional surface plasmon polaritons(SPPs) generator with greatly enhanced generation efficiency is proposed. The SPPs generator consists of an asymmetric single nanoslit coated with a polyviny alcohol(PVA) film and a silver rectangle block. The generation efficiency of this SPPs generator is investigated using the finite difference time domain method. Due to the presence of the silver rectangle block, the SPPs generation efficiency of the asymmetric single nanoslit with PVA film can be greatly enhanced and the corresponding wavelength with the maximum enhancement factor can be tuned flexibly. The influence of the structural parameters on the generation efficiency is also investigated for the enhanced unidirectional SPPs generator.展开更多
文摘The single-slit diffraction experiment is a classic wave optics experiment,which is widely used to study light diffraction,interference phenomena,and wave characteristics.Combined with digital image processing technology,this paper proposes a micro-displacement measurement method based on single-slit diffraction patterns.A one-dimensional light intensity sensor is used to collect diffraction images in real time,and MATLAB platform is employed for image preprocessing and intensity distribution analysis,thereby efficiently extracting displacement-related parameters.Compared with traditional mechanical measurement methods,this method has the advantages of non-contact,high precision,and high sensitivity,and can provide a more reliable solution for the precise measurement of micro-displacement.Experimental results show that the diffraction method can accurately measure micro-displacement at the nanometer level,and has good consistency with traditional measurement methods.This paper also discusses the sources of errors in the experiment and puts forward improvement suggestions,providing valuable references for the development of micro-displacement measurement technology in the future.
基金Project supported by the National Natural Science Foundation of China （Grant Nos. 11174237 and 10974161）, the National Basic Research Program of China （Grant No. 2013CB328904）, the Fundamental Research Funds for the Central Universities of Ministry of Education of China （Grant Nos. SWJTU 12CX084 and SWJTU2（/10ZT06）, and the Innovation Fund for Ph.D. Student of Southwest Jiaotong University, China.
文摘A unidirectional surface plasmon polaritons(SPPs) generator with greatly enhanced generation efficiency is proposed. The SPPs generator consists of an asymmetric single nanoslit coated with a polyviny alcohol(PVA) film and a silver rectangle block. The generation efficiency of this SPPs generator is investigated using the finite difference time domain method. Due to the presence of the silver rectangle block, the SPPs generation efficiency of the asymmetric single nanoslit with PVA film can be greatly enhanced and the corresponding wavelength with the maximum enhancement factor can be tuned flexibly. The influence of the structural parameters on the generation efficiency is also investigated for the enhanced unidirectional SPPs generator.
