Light emission from dye-doped cholesteric liquid crystals at oblique angles: Simulation and experiment

Penninck, Lieven; Beeckman, Jeroen; Visschere, Patrick De; Neyts, Kristiaan

doi:10.1103/physreve.85.041702

Cited by 40 publications

(27 citation statements)

References 19 publications

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“…This means that the CLC layer can be used to increase the purity of the polarization state of the VCSEL. The measurements are compared with simulations using the plane wave expansion method [11]. The simulation of electric fields for left and right circularly polarized modes confirms this measured result.…”

Section: Polarization Of Clc-vcselsupporting

confidence: 73%

Vertical-cavity surface-emitting laser with liquid crystal external cavity

et al. 2014

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We have developed a technology to integrate a thin layer of liquid crystal (LC) on top of a Vertical-Cavity Surface-Emitting Laser (VCSEL). Based on this technology, we demonstrate VCSELs with a chiral liquid crystal (CLC) layer, which acts as a tuneable mirror. The reflection properties of the CLC layer are controlled by temperature. Next we demonstrate VCSEL devices with tuneable external cavity using a nematic LC layer incorporated with an additional dielectric mirror (SiO2/Ta2O5). The VCSEL and the LC layer can be electrically driven independently and the optical length in the external cavity can be tuned by the applied voltage on the LC layer. In both configurations we show that the emission properties of the VCSEL can be changed, in terms of emission wavelength, polarization state and/or lasing threshold

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Section: Polarization Of Clc-vcselsupporting

confidence: 73%

Vertical-cavity surface-emitting laser with liquid crystal external cavity

et al. 2014

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“…Penninck et al applied a plane wave model to simulate the spontaneous emission from a layer of cholesteric liquid crystal [56]. The spectral and angle dependence and the polarization of the emitted light as a function of the order parameter of the dye in the liquid crystal were stimulated.…”

Section: Lasing In Dye Doped Cholesteric Liquid Crystalmentioning

confidence: 99%

Lasing Characteristics of Dye-Doped Cholesteric Liquid Crystal

Porov¹,

Chandel²,

Manohar³

2015

Transactions on Electrical and Electronic Materials

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Cholesteric liquid crystals naturally form helical structures with the helical pitch in an optical wavelength range [7]. The dye and cholesteric liquid crystal molecules are together subjected to the electric field action, which produces a collective movement that leads to changes in molecular arrangement, notably the applied electric field direction. As a result of the applied field, the helical molecular arrangement axis is perpendicular to the electric field direction and then produces an increase in the helical structure pitch [8,9].A cholesteric liquid crystal can be considered as a one-dimensional photonic crystal with a refractive index that is regularly modulated along the helix axis because of the particular arrangement of the molecules. The result is that the propagation of light is suppressed for a particular range of wavelength [10]. Preeti Porov† and Vishal Singh Chandel Department of Physics, Integral University, Lucknow 226026, IndiaReceived January 8, 2015; Revised April 9, 2015; Accepted May 3, 2015Cholesteric liquid crystals are one dimensional photonic band-gap materials due to their birefringence and periodic structure. Dye doped cholesteric liquid crystals are self-assembling, mirror-less, low threshold laser structures that exhibit distributed feedback. In this review paper, we have presented the development in the field of lasing characteristics of dye doped cholesteric liquid crystals.

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“…[54][55][56][57] and termed as a colour-cone lasing. Detailed theoretical and experimental investigations of the off-axis Bragg lasing has recently been performed by Palto et al [58] and Pennick et al [59]. One of the important conclusions following from Ref.…”

Section: Lasing In Liquid Crystalsmentioning

confidence: 97%

Optically pumped mirrorless lasing. A Review. Part II. Lasing in photonic crystals and microcavities

Dudok¹,

Nastishin²

2014

Ukr. J. Phys. Opt.

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Abstract. This article is a second part of the review on optically pumped mirrorless lasing. Consideration of random lasing presented in the first part [Nastishin Yu A and Dudok T H, 2013. Ukr. J. Phys. Opt.] is now followed by analysis of the literature on the lasing in photonic structures, which is mainly focussed on dye-doped cholesteric liquid crystals and microcavities, including liquid-crystal microdroplets.

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Light emission from dye-doped cholesteric liquid crystals at oblique angles: Simulation and experiment

Cited by 40 publications

References 19 publications

Vertical-cavity surface-emitting laser with liquid crystal external cavity

Vertical-cavity surface-emitting laser with liquid crystal external cavity

Lasing Characteristics of Dye-Doped Cholesteric Liquid Crystal

Optically pumped mirrorless lasing. A Review. Part II. Lasing in photonic crystals and microcavities

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