Quantum-dot infrared photodetector with lateral carrier transport

L. Chu; A. Zrenner; M. Bichler; G. Abstreiter

doi:10.1063/1.1408269

Quantum-dot infrared photodetector with lateral carrier transport

L. Chu, A. Zrenner, M. Bichler, G. Abstreiter

Natural Sciences

Walter Schottky Institut

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

In this letter, we present a normal-incident quantum-dot infrared photodetector. The detection principle is based on intersubband transition between the p states and the wetting-layer subband in the conduction band of self-assembled In(Ga)As/GaAs quantum dots. Carrier transport takes place in a channel next to the quantum-dot layers. The photoresponse is peaked at λ = 6.65 μm (186 meV) and reaches a maximum value of over 11 A/W at T = 30 K with a wavelength resolution of 12%. Detector response time τ is determined to be about 0.8 ms. Temperature and frequency dependence of the detector structure are discussed.

Original language	English
Pages (from-to)	2249-2251
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	14
DOIs	https://doi.org/10.1063/1.1408269
State	Published - 1 Oct 2001

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abstract = "In this letter, we present a normal-incident quantum-dot infrared photodetector. The detection principle is based on intersubband transition between the p states and the wetting-layer subband in the conduction band of self-assembled In(Ga)As/GaAs quantum dots. Carrier transport takes place in a channel next to the quantum-dot layers. The photoresponse is peaked at λ = 6.65 μm (186 meV) and reaches a maximum value of over 11 A/W at T = 30 K with a wavelength resolution of 12\%. Detector response time τ is determined to be about 0.8 ms. Temperature and frequency dependence of the detector structure are discussed.",

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N2 - In this letter, we present a normal-incident quantum-dot infrared photodetector. The detection principle is based on intersubband transition between the p states and the wetting-layer subband in the conduction band of self-assembled In(Ga)As/GaAs quantum dots. Carrier transport takes place in a channel next to the quantum-dot layers. The photoresponse is peaked at λ = 6.65 μm (186 meV) and reaches a maximum value of over 11 A/W at T = 30 K with a wavelength resolution of 12%. Detector response time τ is determined to be about 0.8 ms. Temperature and frequency dependence of the detector structure are discussed.

AB - In this letter, we present a normal-incident quantum-dot infrared photodetector. The detection principle is based on intersubband transition between the p states and the wetting-layer subband in the conduction band of self-assembled In(Ga)As/GaAs quantum dots. Carrier transport takes place in a channel next to the quantum-dot layers. The photoresponse is peaked at λ = 6.65 μm (186 meV) and reaches a maximum value of over 11 A/W at T = 30 K with a wavelength resolution of 12%. Detector response time τ is determined to be about 0.8 ms. Temperature and frequency dependence of the detector structure are discussed.

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Quantum-dot infrared photodetector with lateral carrier transport

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