Photoinduced diffraction grating in hybrid artificial molecule

被引：51

作者：

Xiao, Zhi-Hong ^{[1
]}

Zheng, Li ^{[2
]}

Lin, HongZhen ^{[1
]}

机构：

[1] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion SINANO, Int Lab Adapta Bionanotechol, Beijing, Peoples R China

[2] Dalian Polytech Univ, Informat Sci & Engn Coll, Dalian, Peoples R China

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 02期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

QUANTUM-DOT;

D O I：

10.1364/OE.20.001219

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photoinduced diffraction grating is theoretically investigated in a three-level ladder-type hybrid artificial molecule comprised of a semiconductor quantum dot (SQD) and a metal nanoparticle (MNP). The SQD and the MNP are coupled via the Coulomb interaction. The probe absorption vanishes under the action of a strong coupling field, indicating an effect of electromagnetically induced transparency (EIT). Based on this EIT effect, diffraction grating is achievable when a standing-wave coupling field is applied. It turns out that the efficiency of diffraction grating is greatly improved due to the existence of the MNP. Furthermore, the diffraction efficiency can be controlled by tuning the interaction strength between the SQD and the MNP. Nearly pure phase grating is obtained, showing high transmissivity and high diffraction efficiency up to 33%. (C) 2012 Optical Society of America

引用

页码：1219 / 1229

页数：11

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