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      Observation of polarized gain from aligned colloidal nanorods

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      Author(s)
      Gao, Y.
      Ta, V. D.
      Zhao, X.
      Wang Y.
      Chen R.
      Mutlugün, E.
      Fong, K. E.
      Tan S.T.
      Dang C.
      Sun, X. W.
      Sun, H.
      Demir, Hilmi Volkan
      Date
      2015
      Source Title
      Nanoscale
      Print ISSN
      2040-3364
      Publisher
      Royal Society of Chemistry
      Volume
      7
      Issue
      15
      Pages
      6481 - 6486
      Language
      English
      Type
      Article
      Item Usage Stats
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      172
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      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. This journal is © The Royal Society of Chemistry.
      Keywords
      Capillary tubes
      Feedback
      Flexible displays
      Lighting
      Liquid crystal displays
      Tubes (components)
      Whispering gallery modes
      Aligned nanorods
      Colloidal nanorods
      Colloidal semiconductors
      Color conversions
      Cylindrical cavities
      Easy fabrication
      Polarized emissions
      Whispering - gallery - mode lasing
      Nanorods
      Permalink
      http://hdl.handle.net/11693/22070
      Published Version (Please cite this version)
      http://dx.doi.org/10.1039/c4nr07395a
      Collections
      • Department of Electrical and Electronics Engineering 3868
      • Department of Physics 2485
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
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