文献类型：期刊文献

英文题名：Ultranarrow linewidth and high gain of an optical cavity with enhanced self-Kerr nonlinearity in quantum dot molecules

作者：Peng, Yandong[1];Yang, Aihong[1];Li, Dehua[1];Zhang, Huig[1];Niu, Yueping[2];Gong, Shangqing[2]

机构：[1]Shandong Univ Sci & Technol, Coll Elect Commun & Phys, Dept Appl Phys, Qingdao 266590, Peoples R China;[2]E China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China

年份：2014

卷号：11

期号：6

外文期刊名：LASER PHYSICS LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000338642700003)】；

基金：This work is supported by the National Natural Science Foundation of China (No 11204162), the Shandong Provincial Natural Science Foundation, China (Nos ZR2012FQ001, ZR2012FM0011), and the SDUST Research Fund (2012KYTD103).

语种：英文

外文关键词：tunneling induced transparency; self-Kerr nonlinearity; cavity linewidth; dispersion; gain

摘要：The enhanced self-Kerr nonlinearity of quantum dot molecules may be used to realize optical cavities with an ultranarrow linewidth and high gain. The resonant tunneling induces constructive interference for the self-Kerr nonlinearity, and then a narrow gain window with large normal dispersion appears with frequency detuning. The competition between linear and nonlinear dispersion leads to strong normal dispersion of the total susceptibility, which significantly narrows the cavity linewidth; the nonlinear gain introduces the total gain effects contributing to high transmission. Simulation results show that the cavity linewidth could be narrowed by nearly 30 times and the transmission peak enhanced about 40 times compared with a linear case.