Design And Study Of Micro Optical Analog Computing Device

Analog optical computing(AOC)devices able to do a variety of fundamental mathematical computations for the incidence waves have recently gained strong research interest,with the development of the micro and nano-fabrication.Since these devices can do the mathematical computations during the interaction of incidence wave and the devices,it theoretically has higher processing speed compare to traditional electronic computer.In this work,we propose several structures to demonstrate analog optical computing,then analyze their performance and input condition.In the first part of the article,we introduce the principle of AOC and the relation to Fourier optics and analog electronic.Meanwhile,we also analyze the development of AOC nowadays,and summarize several state of the art methods to realize AOC.In the second part,we show that the multilayer technique could be a promising method to design AOC devices.With the theory of transfer matrix,we can optimize the geometry parameters to realize AOC and simulate structure to demonstrate their performance of AOC.Moreover,we investigate the relations of the angular spectrum of incidence wave and the spectrum of devices,and we find that the size of incidence wave is one of the most important factors to the performance of the devices.So we develop a series of devices to satisfy arbitrary of incidence wave.In the third part,we also propose and experimentally demonstrate another AOC device based on metasurface structure,which is compatible to CMOS manufacture nowadays and can be generalized to a series of wavelength.Compare to the multilayer structure,this method can improve the signal to noise ratio(SNR)of the output,and the robustness of the device,while sacrifice the flexibility.