• 主题
高级搜索  >
历史搜索 清空历史
首页> 中文期刊> 《光：科学与应用（英文版）》 >Tailoring the properties of quantum dot-micropillars by ultrafast optical injection of free charge carriers

Tailoring the properties of quantum dot-micropillars by ultrafast optical injection of free charge carriers

         
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We review recent studies of cavity switching induced by the optical injection of free carriers in micropillar cavities containing quantum dots.Using the quantum dots as a broadband internal light source and a streak camera as detector,we track the resonance frequencies for a large set of modes with picosecond time resolution.We report a record-fast switch-on time constant(1.5 ps)and observe major transient modifications of the modal structure of the micropillar on the 10 ps time scale:mode crossings are induced by a focused symmetric injection of free carriers,while a lifting of several mode degeneracies is observed when off-axis injection breaks the rotational symmetry of the micropillar.We show theoretically and experimentally that cavity switching can be used to tailor the dynamic properties of the coupled QD-cavity system.We report the generation of ultrashort spontaneous emission pulses(as short as 6 ps duration)by a collection of frequency-selected QDs in a switched pillar microcavity.These pulses display a very small coherence length,attractive for ultrafast speckle-free imaging.Moreover,the control of QD-mode coupling on the 10 ps time scale establishes cavity switching as an appealing resource for quantum photonics.

著录项

相似文献

  • 中文文献
  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号