Plasmonically induced coherent and polarized random laser emissions in colloidal CdSe/ZnS quantum dots with ellipsoidal Ag nanoparticles

Yung Chi Yao, Zu Po Yang, Jing Yu Haung, Min Hung Lee, Ya Ju Lee*

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

1 引文 斯高帕斯(Scopus)

摘要

We demonstrate the capability of controlling the optical anisotropy of lasing emissions by manipulating the coupling between the oscillated electric field and the localized surface plasmon (LSP) resonance for a random lasing medium composed of colloidal CdSe/ZnS quantum dots (QDs) and ellipsoidal silver nanoparticles (Ag NPs). Distinctive from the amplified spontaneous emission (ASE) generally observed on the CdSe/ZnS QDs, it has been found that lasing emissions of the revealed system exhibit clear interference features with low-threshold characteristics, mainly attributed to enhanced light scatterings and optical gains arisen in the peripheral surfaces of ellipsoidal Ag NPs. Importantly, the relative orientation, between the oscillated electric field of emitted light from CdSe/ZnS QDs and the ellipse axis of Ag NPs, plays a critical role in selective excitation of LSP resonances leading to the laser emissions with preferential optical polarizations. That is further examined and validated by the finite-difference time-domain simulation. The achievement of spatial and spectral coupling of LSP resonance with colloidal QDs respectively make the present system one of the promising candidates of colloidal QDs-based random lasers to achieve coherent and polarized lasing emissions.

原文英語
主出版物標題CLEO
主出版物子標題Science and Innovations, CLEO_SI 2017
發行者OSA - The Optical Society
ISBN(列印)9781943580279
DOIs
出版狀態已發佈 - 2017
事件CLEO: Science and Innovations, CLEO_SI 2017 - San Jose, 美国
持續時間: 2017 5月 142017 5月 19

出版系列

名字Optics InfoBase Conference Papers
Part F41-CLEO_SI 2017

會議

會議CLEO: Science and Innovations, CLEO_SI 2017
國家/地區美国
城市San Jose
期間2017/05/142017/05/19

ASJC Scopus subject areas

  • 電子、光磁材料
  • 材料力學

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