Photocurrent spectroscopy of site-controlled pyramidal quantum dots

被引：3

作者：

Mohan, A. ^{[1
]}

Nevou, L. ^{[1
]}

Gallo, P. ^{[2
]}

Dwir, B. ^{[2
]}

Rudra, A. ^{[2
]}

Kapon, E. ^{[2
]}

Faist, J. ^{[1
]}

机构：

[1] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Phys Nanostruct, CH-1015 Lausanne, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 03期

关键词：

INFRARED PHOTODETECTORS; ABSORPTION; DETECTORS; LAYER;

D O I：

10.1063/1.4737426

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Intraband photocurrent spectroscopy of site-controlled pyramidal quantum dots by inserting them into the intrinsic region of n-i-n like quantum dot infrared photodetector structure is reported. The photovoltaic response is observed in the mid-infrared region. A peak responsivity of 0.4 mA/W at 120meV (lambda = 10 mu m) is observed at 10K at -2 V bias. The ability to engineer states in the conduction band of the QDs has been exploited to tune their photocurrent response from 10 mu m to 18 mu m with a narrow spectral width of Delta lambda/lambda = 0.17. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737426]

引用

页数：3

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