Wavelength-tunable colloidal quantum dot laser on ultra-thin flexible glass

Foucher, C. and Guilhabert, B. and Laurand, N. and Dawson, M. D. (2014) Wavelength-tunable colloidal quantum dot laser on ultra-thin flexible glass. Applied Physics Letters, 104 (14). 141108. ISSN 0003-6951 (https://doi.org/10.1063/1.4871372)

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Abstract

A mechanically flexible and wavelength-tunable laser with an ultra-thin glass membrane as substrate is demonstrated. The optically pumped hybrid device has a distributed feedback cavity that combines a colloidal quantum dot gain film with a grating-patterned polymeric underlayer, all on a 30-μm thick glass sheet. The total thickness of the structure is only 75 μm. The hybrid laser has an average threshold fluence of 450 ± 80 μJ/cm2 (for 5-ns excitation pulses) at an emitting wavelength of 607 nm. Mechanically bending the thin-glass substrate enables continuous tuning of the laser emission wavelength over an 18-nm range, from 600 nm to 618 nm. The correlation between the wavelength tunability and the mechanical properties of the thin laser structure is verified theoretically and experimentally.

ORCID iDs

Foucher, C. ORCID logoORCID: https://orcid.org/0000-0002-3229-7502, Guilhabert, B. ORCID logoORCID: https://orcid.org/0000-0002-3986-8566, Laurand, N. ORCID logoORCID: https://orcid.org/0000-0003-0486-4300 and Dawson, M. D. ORCID logoORCID: https://orcid.org/0000-0002-6639-2989;
  • Item type:Article
    ID code:47451
    Dates:
    Date
    Event
    11 April 2014
    Published
    1 April 2014
    Accepted
    Notes:Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in C. Foucher et al., Appl. Phys. Lett. 104, 141108 (2014) http://dx.doi.org/10.1063/1.4871372 and may be found at http://scitation.aip.org/content/aip/journal/apl/104/14/10.1063/1.4871372. This paper demonstrates a novel and mechanically flexible encapsulation technology for colloidal quantum dot (CQD) lasers. CQD materials are semiconductor nanocrystals which are surface-functionalised to enable solution processing, and are the subject of worldwide research interest for applications including sensing, and novel display and lighting technology. Here we provide the encapsulation essential to long-life performance of CQD lasers in a format that also promotes low-threshold operation towards direct diode pumping and introduces a new way (bending) of tuning the lasers. This work was conceived and led by Professor Dawson and has received 8 citations to date (Google Scholar).
    Subjects:Science > Physics
    Department:Faculty of Science > Physics > Institute of Photonics
    Technology and Innovation Centre > Photonics
    University of Strathclyde > University of Strathclyde
    Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:11 Apr 2014 10:29
    Last modified:21 Nov 2024 01:09
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/47451
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