Temperature dependent color cone lasing in cholesteric liquid crystal

Chen, Po‐Yen; Liao, Kuan-Cheng; Lin, Ja‐Hon; Chen, Yao-Hui; Tzeng, Shwu-Yun Tsay; Wu, Jin−Jei

doi:10.1109/cleopr.2013.6600475

Cited by 1 publication

(1 citation statement)

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“…Cone lasing emission was first demonstrated in a 1D cholesteric liquid crystal film with equally spaced layers [9]. Further researches of the 1D cholesteric liquid crystal films have also been reported by changing the parameters such as the spaces of each layers [10][11][12], the refractive index modulation [13,14] and temperature [15]. Moreover, directional lasing in two- [16] and three-dimensional [17] photonic structures has also been researched.…”

Section: Introductionmentioning

confidence: 99%

Novel cone lasing emission in a non-uniform one-dimensional photonic crystal

Zhou

Ying

et al. 2015

J. Opt.

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Novel cone lasing emission is observed from a photonic crystal (PC) with graded layers, which is fabricated by two-beam holographic interference in dichromated gelatin. The cone lasing is composed of one lasing spot and one concentric lasing ring. The good agreement between the experimental results and a numerical simulation performed using the transfer matrix method demonstrates that this lasing ring is induced by the coupling between the band edge and minigap, which is represented as some oscillations near the band edge in the passband of the reflection spectrum. The cone lasing may be useful for multi-wavelength fluorescence detection since the dual-colour directional enhanced fluorescence can be achieved without the mutual interference of lasing modes. Moreover, this readily observable cone lasing provides a direct visualization of the dispersion relation of non-uniform PCs.

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