摘要
Ultra-compact spectrometers have attracted significant attention for their potential applications in portable systems for biomedical analysis,environmental monitoring,spectral analysis,and astronomical observation.In this work,we propose a miniaturized InGaAs-based extended short-wave infrared(eSWIR)spectrometer based on a single n-graded-p junction with voltage-tunable optical response characteristics in the range from 1600to 2100 nm.We combine this unique optical characteristic with a regression algorithm to realize the reconstruction of an unknown spectrum.The spectrometer achieves a high responsivity of 0.73 A/W at 1650 nm,and a low dark current density of 3.91×10^(-5)A/cm^2 at 200 K,corresponding to a calculated detectivity of1.69×10^(11)cm·Hz^(1/2)/W.Such spectrometers compatible with standard Ⅲ-Ⅴprocesses can offer a pathway to greatly promote the development of miniaturized spectrometers.
基金
National Key Research and Development Program of China(2024YFB2807901)
Innovation Program for Quantum Science and Technology(2021ZD0302300)
Strategic Priority Research Program of Chinese Academy of Sciences(XDB01000000)
National Natural Science Foundation of China(61991441,62275117)
Shenzhen Excellent Youth Program(RCYX20221008092900001)
Synergetic Extreme Condition User Facility(SECUF,https://cstr.cn/31123.02.SECUF)。
