Spontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity

作     者：Gupta, Shilpi Waks, Edo 

作者机构：Univ Maryland Dept Elect & Comp Engn Inst Res Elect & Appl Phys College Pk MD 20742 USA Univ Maryland Joint Quantum Inst College Pk MD 20742 USA 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2013年第21卷第24期

页      面：29612-29619页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Physics Frontier Center at the Joint Quantum Institute [PHY-0822671] Maryland NanoCenter Direct For Mathematical & Physical Scien Division Of Physics Funding Source: National Science Foundation 

主　　题：Atomic force microscopy Photonic crystal cavities Photonic crystals Quantum dot devices Quantum dots Spontaneous emission 

摘      要：We demonstrate spontaneous emission rate enhancement and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity. We perform time-resolved lifetime measurements and observe an average enhancement of 4.6 for the spontaneous emission rate of quantum dots located at the cavity as compared to those located on an unpatterned surface. We also demonstrate that the cavity linewidth narrows with increasing pump intensity due to quantum dot saturable absorption. (C) 2013 Optical Society of America