Liquid crystal

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Photonic liquid crystal fiber intermodal interferometer

Photonic liquid crystal fiber intermodal interferometer

... Photonic Crystal Fibers (PCFs) are micro- structured fibers with periodically distributed air holes in the cladding region. These air holes can be infiltrated with liquid or gases. PCFs may feature solid ...

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Study and application of the complex, spectral and polarization modulation in liquid crystal modulators

Study and application of the complex, spectral and polarization modulation in liquid crystal modulators

... Los aspectos teóricos del trabajo son los que se detallan a continuación. En primer lugar, la inclusión de modelos de dispersión cromática en el modelo de Márquez [2] para moduladores TN- LCD (del inglés Twisted Nematic ...

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Enhancement of the Coupling Gain in GaAs-Liquid Crystal Hybrid Devices

Enhancement of the Coupling Gain in GaAs-Liquid Crystal Hybrid Devices

... (K = 2π /, the grating spacing) and µ (L) is a factor that depends on the thickness of the liquid crystal film. The fitting was performed for the thinnest device (for ≥ 0.7 µm) showing that this ...

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Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes

Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes

... The electrical behavior of MWCNT-doped LC cells differs significantly from this result. The measurement of the doped cells 0 V p , as seen in Figure 4a, shows a remarkable decrease of the impedance along with a much ...

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Design and Measurement of Reconfigurable Millimeter Wave Reflectarray Cells With Nematic Liquid Crystal

Design and Measurement of Reconfigurable Millimeter Wave Reflectarray Cells With Nematic Liquid Crystal

... The computed plane wave scattering from two reflectarray structures with tunable liquid crystal substrate was shown to be in good agreement with experimental results which were ob- tai[r] ...

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Selectively filled photonic liquid crystal fibers : (fibras de cristal fotónico selectivamente llenas con cristal líquido)

Selectively filled photonic liquid crystal fibers : (fibras de cristal fotónico selectivamente llenas con cristal líquido)

... All studies mentioned above refer to propagating SPRs in wires or surfaces coated with metals, where at least one of the dimensions is much longer than the light wavelength. Localized surface plasmon resonances (LSPRs) ...

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Study of ferroelectric liquid crystal modulators for their use in diffractive and polarization optical applications

Study of ferroelectric liquid crystal modulators for their use in diffractive and polarization optical applications

... realización de conmutadores ópticos, y de SLM que realicen elementos binarios. La capa de cristal líquido es de fase esméctica Sm-C*, que presentan una estructura molecular estratificadas en capas, con un cierto ángulo ...

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Characterization and optimization of the liquid crystal on silicon displays for their application to diffractive optics

Characterization and optimization of the liquid crystal on silicon displays for their application to diffractive optics

... This manuscript presents a revision work related to the calibration, optimization and application of Liquid Crystal on Silicon (LCoS) displays. In particular, a thoroughly study of the LCoS displays for ...

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Improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping

Improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping

... between liquid crystal filters is not an easy task because multiple criteria, for comparing performance of the filters, are available: central frequency, filter bandwidth, number of poles, topology, ...

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Dielectric, metallo-dielectric, and liquid crystal-infilled 2D photonic crystals: homogenization and tuning for in-plane and axial propagation

Dielectric, metallo-dielectric, and liquid crystal-infilled 2D photonic crystals: homogenization and tuning for in-plane and axial propagation

... The first tuning experiment was performed by Leonard [32], who infiltrated the NLC E7 into the air pores of a 2D macroporous silicon PC. Strong, polarization-sensitive tuning of the band edges was attained as the sample ...

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Contribution to the analysis and design of reflectarray antennas for reconfigurable beam applications at frequencies above 100 GHz using liquid crystal technology

Contribution to the analysis and design of reflectarray antennas for reconfigurable beam applications at frequencies above 100 GHz using liquid crystal technology

... A liquid crystal is a state of aggregation of matter that can be exploited to develop electronically tunable ...a liquid crystal substance of changing its dielectric permittivity when a ...

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Adaptive liquid-crystal phase-only passive devices

Adaptive liquid-crystal phase-only passive devices

... as liquid crystal spatial light modulators (SLMs) [109], ...effects, liquid crystal cells with a special patterned ITO pie structure can be ...

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A set of lateral shear optical tests with a liquid crystal display

A set of lateral shear optical tests with a liquid crystal display

... a liquid crystal display (LCD), in spite of many years have passed these tests still are very used when somebody try to test large astronomical telescopes, microscope objectives and other optical ...

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Design and optoelectronic evaluation of a holographic polymer dispersed liquid crystal device

Design and optoelectronic evaluation of a holographic polymer dispersed liquid crystal device

... We have designed a switching holographic device based on a photopolymer HPDLC (holographic photopolymer dispersed liquid crystal). Prepolymer composition has been optimized in order to maximize diffraction ...

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A novel high-sensitivity, low-power, liquid crystal temperature sensor

A novel high-sensitivity, low-power, liquid crystal temperature sensor

... Abstract: A novel temperature sensor based on nematic liquid crystal permittivity as a sensing magnitude, is presented. This sensor consists of a specific micrometric structure that gives considerable ...

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Electrooptic characterization of tunable cylindrical liquid crystal lenses

Electrooptic characterization of tunable cylindrical liquid crystal lenses

... The former approach has double lens pitch by applying the electric field only through one comb electrode; however, for the second, the two interdigitated electrodes are used for the de[r] ...

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V-Shape Liquid Crystal-Based Retromodulator Air to Ground Optical Communications

V-Shape Liquid Crystal-Based Retromodulator Air to Ground Optical Communications

... of the interrogating light beam It should however be noted t h a t the active area of a MQW is less t h a n 2 centimetres in diameter, and as the signal power in retro-modulation is [r] ...

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Dispositivos de cristal líquido dopados con nanopartículas = Nanoparticle-doped liquid crystal devices

Dispositivos de cristal líquido dopados con nanopartículas = Nanoparticle-doped liquid crystal devices

... (LCD, liquid cristal display) que ha supuesto la sustitución de los voluminosos tubos de rayos catódicos tanto en pantallas de PC portátiles y de sobremesa como en TV doméstica ...

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Optical Nonlinearities at the Interface between Glass and Liquid Crystal

Optical Nonlinearities at the Interface between Glass and Liquid Crystal

... FIGURE 3 Reflected intensity versus incident intensity with initial TIR: (a) behavior at low intensities for two nematic film thicknesses; (b) behavior when the incident intensity incr[r] ...

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Temporal Electrical Response of V/W-shaped Chiral Smectic Liquid Crystal Displays

Temporal Electrical Response of V/W-shaped Chiral Smectic Liquid Crystal Displays

... Performance of this elec- trical model to account for time domain variations of switching currents in chiral smectic LC displays with V/W-shaped electrooptical response has been analyze[r] ...

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