Polychromatic liquid crystal laser arrays towards display applications

Morris, Stephen M.; Hands, Philip J.W.; Findeisen-Tandel, Sonja; Cole, Robert H.; Wilkinson, Timothy D.; Coles, H. J.

doi:10.1364/oe.16.018827

Cited by 67 publications

(63 citation statements)

References 20 publications

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“…They make good candidates for display technology [5], where their cavity length and polarization properties allow for higher resolutions than current lamp projectors. In spectroscopy [6] the broad tunability of a single source can be utilized to vary the penetration depth and for noninvasive medical treatment.…”

Section: Discussionmentioning

confidence: 99%

“…Understanding chiral lasing sources is therefore a natural objective that can influence several photonic fields, from single-photon quantum information processing [1] to RealD 3D digital stereoscopic projection technology [2]. Moreover, ultrathin, highly versatile, wideband-tunable chiral sources [3,4] are promising candidates for replacing vertical-cavity surfaceemitting lasers and dye lasers in applications such as medical imaging and display technology [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Low-cost, compact, widely tunable chiral laser prototypes have been created, which are continuously tunable from 450 to 850 nm and have a slope efficiency of 60%-70% [5,[8][9][10]. Self-assembling chiral fiber lasers are being created, which range in size from a couple of micrometres to about 100 μm in diameter and can grow several centimeters long.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modes of structurally chiral lasers

Topf

McCall

2014

Phys. Rev. A

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We employ coupled wave theory to enumerate the lasing modes of structurally chiral lasers. The elliptical modes are shown to be fundamentally distinct from those of a scalar distributed feedback laser. High threshold modes are shown to lase with the opposite chirality as the active medium, in contrast to their low-threshold counterparts that lase with the same chirality as the active medium. The lasing mode structure suggests the intriguing possibility of dynamically changing the polarization handedness of a chiral laser, as well as the possibility of lasing within the forbidden band-gap region. These observations arise from the fundamental interplay between the distributed chirality-preserving reflections within the active medium and the localized chirality-reversing reflections at the medium's boundaries.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modes of structurally chiral lasers

Topf

McCall

2014

Phys. Rev. A

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“…While the majority of LCD devices utilize LCs exhibiting a nematic phase, which is the least ordered mesophase, higher-ordered LC phases that allow photonic bandgap formation possess great potential for laser devices [12]. A number of researchers have recently created band-edge LC lasers with cholesteric-, smectic-, and cholesteric bluephase LCs, all of which are capable of continuously tuning the laser wavelength by varying temperature, electric field or wedge structures [12][13][14][15][16][17]. However, these band-edge LC lasers have lasing thresholds much higher than the optofluidic lasers mentioned above, because of the limited light confinement of the naturally formed photonic structures, and thus need further studies to be applicable to light sources of the miniaturized systems.…”

Section: Introductionmentioning

confidence: 99%

Electro-tunable liquid crystal laser based on high-Q Fabry-Pérot microcavity

et al. 2017

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Abstract:We demonstrate an electro-tunable laser based on a plano-concave (p-c) FabryPérot (FP) microcavity filled with dye-doped liquid crystal (LC) gain material. Owing to the high Q-factor of the p-c FP microcavity, the lasing threshold of the LC laser is as low as 0.58 µJ/mm 2 . The single-mode emission wavelength can be easily tuned by varying applied voltage, which induces the reconfiguration of LC molecules. Furthermore, this lasing platform operates at room temperature, thanks to the wide temperature range of the nematic LC. We believe that our LC laser is widely applicable to light sources of various micro total analysis systems. 18. M. Y. Jeong and J. Cha, "Firsthand in situ observation of active fine laser tuning by combining a temperature gradient and a CLC wedge cell structure," Opt.

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“…Recent work has also shown that polychromatic (simultaneous multi-color emission) or widely tuneable laser sources are achievable in liquid crystal form 6 . Through careful choice of dyes and a gradient chiral pitch, a single common pump source can be used to generate laser emission that is selectable across the entire visible spectrum, within a single device.…”

Section: Introductionmentioning

confidence: 99%

Wavelength-tuneable liquid crystal lasers from the visible to the near-infrared

et al. 2011

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The study of band-edge lasing from dye-doped chiral nematic liquid crystals has thus far been largely restricted to visible wavelengths. In this paper, a wide range of commercially available laser dyes are examined for their suitability as infrared emitters within a chiral nematic host. Problems such as poor solubility and reduced quantum efficiencies are overcome, and successful band-edge lasing is demonstrated within the range of 735-850 nm, using the dyes LD800, HITC-P and DOTC-P. This paper also reports on progress towards widely tuneable liquid crystal lasers, capable of emission in the region 460-850 nm. Key to this is the use of common pump source, capable of simultaneously exciting all of the dyes (both infrared and visible) that are present within the system. Towards this aim, we successfully demonstrate near-infrared lasing (800 nm) facilitated by Förster energy transfer between the visible dye DCM, and the infra-red dye LD800, enabling pump wavelengths anywhere between 420 and 532 nm to be used.These results demonstrate that small and low-cost tuneable visible to near-infrared laser sources are achievable, using a single common pump source. Such devices are envisaged to have wide-ranging applications including medical imaging (including optical coherence tomography), point-of-care optical medical diagnostics (such as flow cytometry), telecommunications, and optical signatures for security coatings.

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Polychromatic liquid crystal laser arrays towards display applications

Cited by 67 publications

References 20 publications

Modes of structurally chiral lasers

Modes of structurally chiral lasers

Electro-tunable liquid crystal laser based on high-Q Fabry-Pérot microcavity

Wavelength-tuneable liquid crystal lasers from the visible to the near-infrared

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