Lateral photocurrent spectroscopy on self-assembled PbSe quantum dots

被引：12

作者：

Simma, M ^{[1
]}

Fromherz, T ^{[1
]}

Raab, A ^{[1
]}

Springholz, G ^{[1
]}

Bauer, G ^{[1
]}

机构：

[1] Johannes Kepler Univ, Inst Halbeiter & Festkorperphys, A-4040 Linz, Austria

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 20期

基金：

奥地利科学基金会;

关键词：

D O I：

10.1063/1.2202127

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Wavelength- and temperature-dependent lateral photocurrent measurements were performed on self-assembled PbSe/PbEuTe quantum-dot superlattices. The comparison of the measured data with absorption spectra calculated within the envelope function approach allows a clear identification of the different features in the photocurrent spectra. The photocurrent signal from the dots is observed over a wide temperature range and no quenching occurs even at 5 K. This indicates a type-II band alignment for the strained PbSe/PbEuTe quantum-dots. (c) 2006 American Institute of Physics.

引用

页数：3

共 12 条

[1]

BASTARD G, 1993, WAVE MECH APPL SEMIC

[2] Approximate methods for the solution of quantum wires and dots: Connection rules between pyramidal, cuboidal, and cubic dots [J].

Califano, M ;

Harrison, P .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (09) :5054-5059

[3]

Grundmann M., 2002, Nanooptoelectronics: Concepts, Physics and Devices

[4]

Masumoto Y., 2002, SEMICONDUCTOR QUANTU

[5] Controlling the size and density of self-assembled PbSe quantum dots by adjusting the substrate temperature and layer thickness [J].

Raab, A ;

Springholz, G .

APPLIED PHYSICS LETTERS, 2002, 81 (13) :2457-2459

[6] Growth temperature and coverage dependence of vertical and lateral ordering in self-assembled PbSe quantum-dot superlattices [J].

Raab, A ;

Lechner, RT ;

Springholz, G .

PHYSICAL REVIEW B, 2003, 67 (16)

[7] Self-organized growth of three-dimensional quantum-dot crystals with fcc-like stacking and a tunable lattice constant [J].

Springholz, G ;

Holy, V ;

Pinczolits, M ;

Bauer, G .

SCIENCE, 1998, 282 (5389) :734-737

[8] Midinfrared surface-emitting PbSe/PbEuTe quantum-dot lasers [J].

Springholz, G ;

Schwarzl, T ;

Heiss, W ;

Bauer, G ;

Aigle, M ;

Pascher, H ;

Vavra, I .

APPLIED PHYSICS LETTERS, 2001, 79 (09) :1225-1227

[9] Electronic and structural anomalies in lead chalcogenides [J].

Wei, SH ;

Zunger, A .

PHYSICAL REVIEW B, 1997, 55 (20) :13605-13610

[10] ELECTRONIC AND OPTICAL-PROPERTIES OF PBTE/PB1-XEUXTE MULTIPLE-QUANTUM-WELL STRUCTURES [J].

YUAN, S ;

SPRINGHOLZ, G ;

BAUER, G ;

KRIECHBAUM, M .

PHYSICAL REVIEW B, 1994, 49 (08) :5476-5489

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