Optical Amplification Using Raman Transitions between Spin-Singlet and Spin-Triplet States of a Pair of Coupled In-GaAs Quantum Dots

被引：27

作者：

Elzerman, J. M. ^{[1
]}

Weiss, K. M. ^{[1
]}

Miguel-Sanchez, J. ^{[1
]}

Imamoglu, A. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 01期

基金：

瑞士国家科学基金会;

关键词：

ONE-ATOM; LASER; SPECTROSCOPY; DYNAMICS;

D O I：

10.1103/PhysRevLett.107.017401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of steady-state optical amplification in Raman transitions between the lowest-energy spin states of a single quantum-dot molecule. Absorption and resonance fluorescence experiments demonstrate that the entangled two-electron singlet and triplet states have electric-dipole coupling to a common optically excited state. Fast spin relaxation ensures optical gain on the triplet transition when the singlet transition is driven resonantly. By embedding the quantum-dot molecule in a cavity of modest quality factor, a solid-state single-emitter laser can be realized.

引用

页数：4

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