可调谐热载流子光电探测器

2015 IEEE Summer Topicals Meeting Series (SUM) Pub Date : 2015-07-13 DOI:10.1109/PHOSST.2015.7248193

A. G. Unil Perera, Y. Lao, L. Li, S. Khanna, E. Linfield

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引用次数: 0

摘要

传统光电探测器的波长极限(λc)是由半导体结构的活化能通过以下关系决定的:λc = hc/Δ，其中Δ还决定了探测器的噪声(暗电流)，从而决定了它的性能，如工作温度。利用冷热载流子能量传递机制证明了长波光探测原理。对于Δ = 0.32 eV的探测器，实验结果显示响应范围可达55 μm。扩展响应可以通过改变热孔注入的程度来调节。

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Tunable hot-carrier photodetector

The wavelength limit (λ_c) of detection in a conventional photodetector is determined by the activation energy of the semiconductor structure through the relationship: λ_c = hc/Δ, where Δ also determines the detector noise (dark current) and hence its performance such as the operating temperature. A long wavelength photodetection principle has been demonstrated by using a hot-cold carrier energy transfer mechanism. A detector with Δ = 0.32 eV experimentally shows response up to 55 μm. The extend response is tunable by varying the degree of hot-hole injection.

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2015 IEEE Summer Topicals Meeting Series (SUM)

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