Lasing effect in blue phase liquid crystal

Tsung Hsien Lin, Chun Wei Chen, Hung Chang Jau, Chun Hong Lee, Chun Ta Wang, Chih Wei Wu, Huai Ping Huang, Iam-choon Khoo

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

1 Citation (Scopus)

Abstract

We report on the investigation of random lasing in blue phase liquid crystals. Multiple scattering and interference effects arising from disordered platelet texture as well as index mismatch between polymer and mesogen contribute the optical feedbacks towards laser action. In pure blue phase liquid crystals, the random laser can be switched between the coherent and incoherent types by executing distinct heating/cooling cycles; and, the randomness of lasing wavelengths can be determined by the platelet size, which can be set by controlling the cooling rate. After the blue phase liquid crystals are polymer-stabilized, coherent random lasing may occur in both the blue phase with an extended temperature interval and the isotropic liquid state; also, the selected modes are constant from one pulse to another. Additionally, if the laser dye is sensitive to temperature, the excitation threshold and the emission spectrum could be altered via thermal control.

Original languageEnglish (US)
Title of host publicationLiquid Crystals XVII
DOIs
StatePublished - Nov 4 2013
EventLiquid Crystals XVII - San Diego, CA, United States
Duration: Aug 25 2013Aug 28 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8828
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherLiquid Crystals XVII
CountryUnited States
CitySan Diego, CA
Period8/25/138/28/13

Fingerprint

Liquid Crystals
Platelets
Liquid Crystal
Liquid crystals
lasing
liquid crystals
Cooling
platelets
Optical feedback
Dye lasers
Lasers
Multiple scattering
Liquid crystal polymers
Laser
Laser modes
cooling
Laser pulses
Polymers
Textures
polymers

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Lin, T. H., Chen, C. W., Jau, H. C., Lee, C. H., Wang, C. T., Wu, C. W., ... Khoo, I. (2013). Lasing effect in blue phase liquid crystal. In Liquid Crystals XVII [882808] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8828). https://doi.org/10.1117/12.2022738
Lin, Tsung Hsien ; Chen, Chun Wei ; Jau, Hung Chang ; Lee, Chun Hong ; Wang, Chun Ta ; Wu, Chih Wei ; Huang, Huai Ping ; Khoo, Iam-choon. / Lasing effect in blue phase liquid crystal. Liquid Crystals XVII. 2013. (Proceedings of SPIE - The International Society for Optical Engineering).
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Lin, TH, Chen, CW, Jau, HC, Lee, CH, Wang, CT, Wu, CW, Huang, HP & Khoo, I 2013, Lasing effect in blue phase liquid crystal. in Liquid Crystals XVII., 882808, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8828, Liquid Crystals XVII, San Diego, CA, United States, 8/25/13. https://doi.org/10.1117/12.2022738

Lasing effect in blue phase liquid crystal. / Lin, Tsung Hsien; Chen, Chun Wei; Jau, Hung Chang; Lee, Chun Hong; Wang, Chun Ta; Wu, Chih Wei; Huang, Huai Ping; Khoo, Iam-choon.

Liquid Crystals XVII. 2013. 882808 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8828).

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

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AB - We report on the investigation of random lasing in blue phase liquid crystals. Multiple scattering and interference effects arising from disordered platelet texture as well as index mismatch between polymer and mesogen contribute the optical feedbacks towards laser action. In pure blue phase liquid crystals, the random laser can be switched between the coherent and incoherent types by executing distinct heating/cooling cycles; and, the randomness of lasing wavelengths can be determined by the platelet size, which can be set by controlling the cooling rate. After the blue phase liquid crystals are polymer-stabilized, coherent random lasing may occur in both the blue phase with an extended temperature interval and the isotropic liquid state; also, the selected modes are constant from one pulse to another. Additionally, if the laser dye is sensitive to temperature, the excitation threshold and the emission spectrum could be altered via thermal control.

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Lin TH, Chen CW, Jau HC, Lee CH, Wang CT, Wu CW et al. Lasing effect in blue phase liquid crystal. In Liquid Crystals XVII. 2013. 882808. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2022738