Abstract
The unprecedented ability of metallic subwavelength structures to confine and concentrate light into subwavelength spaces has led to new physics and exploration of novel devices. In this Letter, we demonstrate a 20 times enhancement of intersubband photoresponse in a InAs quantum dot (QD) system due to evanescently coupled plasmonic field. The resulting enhancement is accompanied by significant narrowing of photoresponse linewidth. The strong enhancement is attributed to efficient coupling of incident field to surface modes and to QDs, the presence of polarization-dependent absorption from QDs, and a fairly strong plasmon–QD interaction.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Hui Xu, Jiaming Liu, Xiaoyu Duan, Jiahua Li, Jiancai Xue, Xiye Sun, Yefan Cai, Zhang-Kai Zhou, and Xuehua Wang
Opt. Mater. Express 4(12) 2586-2594 (2014)
A. I. Yakimov, V. V. Kirienko, A. A. Bloshkin, V. A. Armbrister, A. V. Dvurechenskii, and J.-M. Hartmann
Opt. Express 25(21) 25602-25611 (2017)
Guiru Gu, Jarrod Vaillancourt, and Xuejun Lu
Opt. Express 22(21) 24970-24976 (2014)