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Title: Observation of polarized gain from aligned colloidal nanorods
Authors: Gao, Yuan
Ta, Van Duong
Zhao, Xin
Wang, Yue
Chen, Rui
Mutlugun, Evren
Fong, Kah Ee
Tan, Swee Tiam
Dang, Cuong
Sun, Xiao Wei
Sun, Handong
Demir, Hilmi Volkan
Keywords: Cylindrical cavities
Colloidal nanorods
Issue Date: 2015
Source: Gao, Y., Ta, V. D., Zhao, X., Wang, Y., Chen, R., Mutlugun, E., et al. (2015). Observation of polarized gain from aligned colloidal nanorods. Nanoscale, 7(15), 6481-6486.
Series/Report no.: Nanoscale
Abstract: In recent years, colloidal semiconductor nanorods have attracted great interest for polarized spontaneous emission. However, their polarized gain has not been possible to achieve so far. In this work we show the highly polarized stimulated emission from the densely packed ensembles of core-seeded nanorods in a cylindrical cavity. Here CdSe/CdS dot-in-rods were coated and aligned on the inner wall of a capillary tube, providing optical feedback for the nanorod gain medium. Results show that the polarized gain originates intrinsically from the aligned nanorods and not from the cavity and that the optical anisotropy of the nanorod ensemble was amplified with the capillary tube, resulting in highly polarized whispering gallery mode lasing. The highly polarized emission and lasing, together with easy fabrication and flexible incorporation, make this microlaser a promising candidate for important color conversion and enrichment applications including liquid crystal display backlighting and laser lighting.
ISSN: 2040-3364
DOI: 10.1039/C4NR07395A
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2015 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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