&lt;title&gt;Orientation dependencies of diffraction efficiency of the dynamic holographic corrector recorded in optically addressed spatial light modulator with the ferroelectric liquid crystal&lt;/title&gt;

Berenberg, Vladimir A.; Chaika, Aleksander N.; Gruneisen, Mark T.; Onokhov, A. P.; Vasil'ev, Michael V.

doi:10.1117/12.367586

Cited by 3 publications

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“…The fact that the behaviour of the polarization dependence of DE is governed mainly by the type of the electrooptic effect used for the hologram writing, is confirmed by the results of measurements of DE for OA SLM containing various PC layers. An explanation of a possible effect of the various DE behaviour on the light polarization direction depending on the electrooptic effect used is given in Ref [3]. …”

Section: Diffraction Efficiency Of Reflective Type Oaslmsmentioning

confidence: 99%

<title>OA LC SLM with high-net optical efficiency for holographic correction of distortions</title>

Berenberg

Beresnev²,

Chaika

et al. 2000

SPIE Proceedings

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The reflective type optically addressed spatial light modulators (OASLMs) with an amorphous hydrogenated carbon (a-C:H) light-blocking layer (LBL) sandwiched between an intrinsic hydrogenated silicon carbide (a-Si:C:H) photoconductor and broad-band and narrow-band dielectric minors have been developed. FLC was used as a light modulating medium. The DHF effect in an FLC with tilt angle ® = 39°and SS (Clark-Lagerwall) effect with angle 22,5° were employed. The study showed that a flexible design of the OASLMs are possible. As a result of optimal design of the reflective type OASLMs with the dielectric mirrors of two types, the following performance characteristics have been obtained. Diffraction efficiency (DE) was about 30%, net diffraction efficiency (NE) was about 20% (spatial frequency equal 30 lp/mm and frame refreshment rate equal 200 Hz). This net diffraction efficiency practically does not depend on the direction of the reading-out light polarization for the OASLMs operating on the DHF mode.Keywords: reflective type optically addressed spatial light modulator, amorphous hydrogenated carbon light-blocking layer, hydrogenated silicon carbide photoconductor, dielectric mirror, diffraction efficiency, dynamic holography.

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Section: Diffraction Efficiency Of Reflective Type Oaslmsmentioning

confidence: 99%

<title>OA LC SLM with high-net optical efficiency for holographic correction of distortions</title>

Berenberg

Beresnev²,

Chaika

et al. 2000

SPIE Proceedings

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“…The employment of an amorphous hydrogenated carbon (a-C:H) film absorbing in the visible region as an LBL in the OASLMs with a-Si:C:H photosensor is a novel technical solution of the problem of optical decoupling of the write and read light signals [27][28][29]. The 0.5 µm thick a-C:H LBL and the dielectric mirror with reflectivity equal to 80% have ensured writing and reading a diffraction grating at the same wavelength of 633 nm in the OASLM with a deformed helix FLC [28]. The intensity of reading out radiation had no influence on photoaddressing of the a-Si:C:H photoconductor.…”

Section: Introductionmentioning

confidence: 99%

Properties of a-C:H light-blocking layer used for optical isolation of a-Si:C:H photosensor in reflective liquid crystal spatial light modulators

Konshina

Феоктистов

2001

J. Phys. D: Appl. Phys.

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Novel employment of the absorbing a-C:H layer for optical isolation of an a-Si:C:H photosensor in the reflective liquid crystal optically addressed spatial light modulators is discussed. The dependences of electrical resistivity ρ, Tauc gap ET and an absorption coefficient α at 633 nm on the deposition rate of the a-C:H films in the interval from 1 to 10 Å s-1 were compared and correlations between these properties were ascertained to match the a-C:H layer with the a-Si:C:H layer electrically. Current-voltage characteristics of ITO/a-C:H and ITO/a-Si:C:H/a-C:H thin-film structures were measured using a mercury droplet contact. Our investigations showed that the absorbing a-C:H layer with α~4×104 cm-1 at λ = 633 nm-1, ρ in the range from 1010 to 1011 Ω cm, and ET in the range from 1.25 up to 1.5 eV can ensure effective optical isolation and be a well matched couple with the a-Si:C:H photoconductor. The photocurrent and dark current I-V characteristics of such ITO/a-Si:C:H/a-C:H thin-film structures were symmetrical. The ratio between photocurrents and dark currents of such structures was governed by the photosensitivity of the a-Si:C:H layer and depended on the electrical resistance of the a-C:H layer.

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Fundamentals Of Membrane Optics

2001

Gossamer Spacecraft: Membrane and Inflatable Structures Technology for Space Applications

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<title>Orientation dependencies of diffraction efficiency of the dynamic holographic corrector recorded in optically addressed spatial light modulator with the ferroelectric liquid crystal</title>

Cited by 3 publications

References 1 publication

<title>OA LC SLM with high-net optical efficiency for holographic correction of distortions</title>

<title>OA LC SLM with high-net optical efficiency for holographic correction of distortions</title>

Properties of a-C:H light-blocking layer used for optical isolation of a-Si:C:H photosensor in reflective liquid crystal spatial light modulators

Fundamentals Of Membrane Optics

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