Tunable random lasing emissions by manipulating plasmonic coupling strengths on flexible substrates

Ting Wei Yeh, Chun Yang Chou, Zu Po Yang, Nguyen Thi Bich Hanh, Yung Chi Yao, Meng Tsan Tsai, Hao Chun Kuo, Ya Ju Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A random laser is a unique system in which an assembly of disordered scatters is distributed all over the gain medium to sustain the required optical feedbacks by multiple scatterings for the stimulation of lasing action. Due to the absence of well-defined resonance cavity or rigid alignment of optical elements, it is hence difficult to control the random lasing emissions. In this study, we experimentally demonstrated a flexible random laser fabricated on the polyethylene terephthalate (PET) substrate with a high degree of tunability in lasing emissions. Random lasing wavelength is blue-shifted monolithically with the increasing of bending strains exerted on the PET substrate, and the maximum shift of lasing wavelength of ∼15 nm was achieved as a 50% bending strain is exerted on the PET substrate. Such observation is highly repeatable and reversible, and it validates that we are able to control the lasing wavelengths by simply bending the flexible substrate. The result herein shows a great advance for the applications of flexible optoelectronic devices, including wearable devices, ultrathin display, and health sensors.

Original languageEnglish
Title of host publication2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings
Subtitle of host publicationApplications and Technology, CLEO_AT 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781557528209
ISBN (Print)9781943580422
DOIs
Publication statusPublished - 2018 Aug 6
Event2018 Conference on Lasers and Electro-Optics, CLEO 2018 - San Jose, United States
Duration: 2018 May 132018 May 18

Publication series

Name2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings

Conference

Conference2018 Conference on Lasers and Electro-Optics, CLEO 2018
CountryUnited States
CitySan Jose
Period18/5/1318/5/18

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Yeh, T. W., Chou, C. Y., Yang, Z. P., Hanh, N. T. B., Yao, Y. C., Tsai, M. T., Kuo, H. C., & Lee, Y. J. (2018). Tunable random lasing emissions by manipulating plasmonic coupling strengths on flexible substrates. In 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings: Applications and Technology, CLEO_AT 2018 [8426910] (2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1364/CLEO_AT.2018.JTh2A.52