Design, simulation and fabrication of ambient light detector
Date Issued
2005
Date
2005
Author(s)
Wu, Jiun-Yi
DOI
zh-TW
Abstract
In this thesis, we firstly investigate the feasibility of designing ambient light detectors based on Si and AlGaAs semiconductor through a self-developed device simulator. It is found that the difference between the cutoff wavelength of silicon and the peak wavelength of human eye’s response is too large to eliminate the infrared light detection in Si-based devices, which needs extra detectors and/or signal processing for correction otherwise may result in error response. On the other hand, the cutoff wavelength of AlGaAs can be tailored to fit the response edge of human eye’s response. Besides the design and simulation works on AlGaAs detectors, we also grew device structures with different AlGaAs by molecular beam epitaxy and fabricated the detectors successfully. The best response is very close to the CIE standard photopic luminous function.
Subjects
類人眼光偵測器
砷化鋁鎵
環境光
光偵測器
ambient light detector
AlGaAs
ambient light
photodetector
Type
thesis
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