嵌入纳米机械谐振器中的混合纳米晶体复合物的相干光学光谱学。

Coherent optical spectroscopy of a hybrid nanocrystal complex embedded in a nanomechanical resonator.

作者信息

Wang Huan, Zhu Ka-Di

机构信息

Key Laboratory of Artificial Structures and Quantum Control(MOE), Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China.

出版信息

Opt Express. 2010 Jul 19;18(15):16175-82. doi: 10.1364/OE.18.016175.

DOI:10.1364/OE.18.016175

PMID:20721003

Abstract

We have theoretically investigated a hybrid nanocrystal complex consisted of a metal nanoparticle (MNP) and a semiconductor quantum dot (SQD) embedded in a nanomechanical resonator in the simultaneous presence of a strong control field and a weak probe field. It is shown that the resonance amplification peak of the probe spectrum will enhance dramatically due to the coupling of the plasmon, exciton and nanomechanical resonator. The enhancement increases significantly with decreasing the distance between the metal nanoparticle and a quantum dot, which implies the strong plasmon enhancement effect in this coupled system. The results obtained here may have the potential applications such as tunable Raman lasers and bio-sensors.

摘要

我们从理论上研究了一种混合纳米晶体复合物，它由嵌入纳米机械谐振器中的金属纳米颗粒（MNP）和半导体量子点（SQD）组成，同时存在强控制场和弱探测场。结果表明，由于等离子体激元、激子和纳米机械谐振器的耦合，探测光谱的共振放大峰将显著增强。随着金属纳米颗粒与量子点之间距离的减小，这种增强显著增加，这意味着在该耦合系统中存在强等离子体增强效应。此处获得的结果可能具有诸如可调谐拉曼激光器和生物传感器等潜在应用。