Random lasing in blue phase liquid crystals

Chun Wei Chen, Hung Chang Jau, Chun Ta Wang, Chun Hong Lee, Iam-choon Khoo, Tsung Hsien Lin

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Random lasing actions have been observed in optically isotropic pure blue-phase and polymer-stabilized blue-phase liquid crystals containing laser dyes. Scattering, interferences and recurrent multiple scatterings arising from disordered platelet texture as well as index mismatch between polymer and mesogen in these materials provide the optical feedbacks for lasing action. In polymer stabilized blue-phase liquid crystals, coherent random lasing could occur in the ordered blue phase with an extended temperature interval as well as in the isotropic liquid state. The dependence of lasing wavelength range, mode characteristics, excitation threshold and other pertinent properties on temperature and detailed makeup of the crystals platelets were obtained. Specifically, lasing wavelengths and mode-stability were found to be determined by platelet size, which can be set by controlling the cooling rate; lasing thresholds and emission spectrum are highly dependent on, and therefore can be tuned by temperature.

Original languageEnglish (US)
Pages (from-to)23978-23984
Number of pages7
JournalOptics Express
Volume20
Issue number21
DOIs
StatePublished - Oct 8 2012

Fingerprint

lasing
liquid crystals
platelets
polymers
thresholds
scattering
wavelengths
dye lasers
temperature
emission spectra
textures
intervals
interference
cooling
liquids
excitation
crystals

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Chen, C. W., Jau, H. C., Wang, C. T., Lee, C. H., Khoo, I., & Lin, T. H. (2012). Random lasing in blue phase liquid crystals. Optics Express, 20(21), 23978-23984. https://doi.org/10.1364/OE.20.023978
Chen, Chun Wei ; Jau, Hung Chang ; Wang, Chun Ta ; Lee, Chun Hong ; Khoo, Iam-choon ; Lin, Tsung Hsien. / Random lasing in blue phase liquid crystals. In: Optics Express. 2012 ; Vol. 20, No. 21. pp. 23978-23984.
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Chen, CW, Jau, HC, Wang, CT, Lee, CH, Khoo, I & Lin, TH 2012, 'Random lasing in blue phase liquid crystals', Optics Express, vol. 20, no. 21, pp. 23978-23984. https://doi.org/10.1364/OE.20.023978

Random lasing in blue phase liquid crystals. / Chen, Chun Wei; Jau, Hung Chang; Wang, Chun Ta; Lee, Chun Hong; Khoo, Iam-choon; Lin, Tsung Hsien.

In: Optics Express, Vol. 20, No. 21, 08.10.2012, p. 23978-23984.

Research output: Contribution to journalArticle

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Chen CW, Jau HC, Wang CT, Lee CH, Khoo I, Lin TH. Random lasing in blue phase liquid crystals. Optics Express. 2012 Oct 8;20(21):23978-23984. https://doi.org/10.1364/OE.20.023978