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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publication2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-2
Number of pages2
ISBN (Electronic)9781943580279
DOIs
StatePublished - 25 Oct 2017
Event2017 Conference on Lasers and Electro-Optics, CLEO 2017 - San Jose, United States
Duration: 14 May 201719 May 2017

Publication series

Name2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings
Volume2017-January

Conference

Conference2017 Conference on Lasers and Electro-Optics, CLEO 2017
CountryUnited States
CitySan Jose
Period14/05/1719/05/17

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