Gain Control in Semiconductor Quantum Dots via State-Resolved Optical Pumping

被引：107

作者：

Cooney, Ryan R. ^{[1
]}

Sewall, Samuel L. ^{[1
]}

Sagar, D. M. ^{[1
]}

Kambhampati, Patanjali ^{[1
]}

机构：

[1] McGill Univ, Dept Chem, Montreal, PQ H3A 2K6, Canada

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LIGHT AMPLIFICATION; NANOCRYSTALS; CDSE; DEPENDENCE; EMISSION; RODS;

D O I：

10.1103/PhysRevLett.102.127404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Excitonic state-resolved optical pumping experiments were performed on strongly confined semiconductor quantum dots. We demonstrate for the first time that optical gain is dependent upon the initial excitonic state. By prescribing the specific multiexcitonic states which can create, block, and ultimately control optical gain spectra, we recover the theoretically predicted size independence, even in systems which previously showed zero gain. In addition, we show for the first time that stimulated emission in quantum dots can be controlled via specific multiexcitonic interactions.

引用

页数：4

共 25 条

[1] Spectral and dynamical characterization of multiexcitons in colloidal CdSe semiconductor quantum dots [J].

Bonati, C ;

Mohamed, MB ;

Tonti, D ;

Zgrablic, G ;

Haacke, S ;

van Mourik, F ;

Chergui, M .

PHYSICAL REVIEW B, 2005, 71 (20)

[2] Transient photoluminescence and simultaneous amplified spontaneous emission from multiexciton states in CdSe quantum dots [J].

Caruge, JM ;

Chan, YT ;

Sundar, V ;

Eisler, HJ ;

Bawendi, MG .

PHYSICAL REVIEW B, 2004, 70 (08) :085316-1

[3] Breaking the phonon bottleneck for holes in semiconductor quantum dots [J].

Cooney, Ryan R. ;

Sewall, Samuel L. ;

Anderson, Kevin E. H. ;

Dias, Eva A. ;

Kambhampati, Patanjali .

PHYSICAL REVIEW LETTERS, 2007, 98 (17)

[4] Unified picture of electron and hole relaxation pathways in semiconductor quantum dots [J].

Cooney, Ryan R. ;

Sewall, Samuel L. ;

Dias, Eva A. ;

Sagar, D. M. ;

Anderson, Kevin E. H. ;

Kambhampati, Patanjali .

PHYSICAL REVIEW B, 2007, 75 (24)

[5] Observation of optical gain in solutions of CdS quantum dots at room temperature in the blue region [J].

Darugar, Qusai ;

Qian, Wei ;

El-Sayed, Mostafa A. .

APPLIED PHYSICS LETTERS, 2006, 88 (26)

[6] The electronic structure of semiconductor nanocrystals [J].

Efros, AL ;

Rosen, M .

ANNUAL REVIEW OF MATERIALS SCIENCE, 2000, 30 :475-521

[7]

*EPAPS, EPRLTAO102068915 EPA

[8] Radiative recombination of triexcitons in CdSe colloidal quantum dots [J].

Franceschetti, A. ;

Troparevsky, M. C. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (17) :6154-6157

[9] Light amplification in semiconductor nanocrystals: Quantum rods versus quantum dots [J].

Htoon, H ;

Hollingworth, JA ;

Malko, AV ;

Dickerson, R ;

Klimov, VI .

APPLIED PHYSICS LETTERS, 2003, 82 (26) :4776-4778

[10] Light amplification using inverted core/shell nanocrystals: Towards lasing in the single-exciton regime [J].

Ivanov, SA ;

Nanda, J ;

Piryatinski, A ;

Achermann, M ;

Balet, LP ;

Bezel, IV ;

Anikeeva, PO ;

Tretiak, S ;

Klimov, VI .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (30) :10625-10630

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