scholarly journals Spatial light modulators

Photoniques ◽  
2020 ◽  
pp. 59-64
Author(s):  
Aurélie Jullien
Keyword(s):  
Light Beam ◽  
Technological Development ◽  
Incident Light ◽  
Spatial Light Modulators ◽  
Incident Light Beam ◽  
Light Modulators ◽  
Spatial Dimensions ◽  
The Subject

Spatial Light Modulators (SLMs) are quasiplanar devices, allowing for the modulation of the amplitude, phase and polarization, or a combination of these parameters of an incident light beam according to the two spatial dimensions of the modulator. SLMs are employed in many different fields and are the subject of continuous technological development.

Excitation of a ridge waveguide by a normally incident light beam

1995 ◽  
Vol 25 (6) ◽  
pp. 582-586 ◽  
Author(s):  
O Parriaux ◽  
V A Sychugov ◽  
A V Tishchenko
Keyword(s):  
Light Beam ◽  
Incident Light ◽  
Ridge Waveguide ◽  
Incident Light Beam

Enhancement of diffraction efficiency for optical gratings

2000 ◽  
Vol 78 (5-6) ◽  
pp. 537-542
Author(s):  
G Z Zhang
Keyword(s):  
Light Beam ◽  
Diffraction Efficiency ◽  
Beam Energy ◽  
Incident Light ◽  
Glass Plate ◽  
Air Gap ◽  
Multiple Reflection ◽  
Input Beam ◽  
Incident Light Beam ◽  
Optical Gratings

A method to increase the diffraction efficiency for optical gratings is proposed. Using a simple glass plate sitting parallel to the top of a grating surface, one can form an air gap between the surfaces of the grating and the glass plate to reflect a grazing-incident light beam and make diffraction through multiple reflection of the beam between the grating and glass plate surfaces. As a result, this device can efficiently enhance the grating efficiency by diffracting the input beam energy into various diffraction orders. PACS Nos.: 07.60-j, 42.25Fx, 42.40Lx, 42.79Dj, 42.40Fg

Optical Studies of The Uniformity of Thermally Induced In-Plane Strain in Thin Gallium Arsenide Films

1994 ◽  
Vol 340 ◽  
Author(s):  
M. Taysing-Lara ◽  
H. Shen ◽  
M. Wraback ◽  
J. Pamulapati ◽  
M. Dutta
Keyword(s):  
Plane Strain ◽  
Interband Transition ◽  
Incident Light ◽  
Polarization Vector ◽  
Spot Size ◽  
Spatial Light Modulators ◽  
Thermally Induced ◽  
Light Modulators ◽  
Key Issues ◽  
Lift Off

ABSTRACTIn-plane anisotropic strain can be employed in the design of a new class of optoelectronic devices, such as high contrast, polarization sensitive spatial light modulators. One of the key issues involved in realizing these devices is obtaining a controllable and uniform in-plane strain. We have studied the uniformity of thermally induced in-plane strain in MOCVD grown GaAs lift-off thin films mounted on LiTaO3 or CaCO3 substrates. The experiment exploits the straininduced splitting of the excitonic interband transition at low temperature through absorption measurements using a Ti-Sapphire laser focused to a spot size less than 100 μm. The polarization vector of the incident light was oriented along an axis which enhances both features. From the energy positions of these transitions, the magnitude as well as the type of the in-plane strain was determined. Topographic scans performed over a 1.4mm X 1.4mm area for the sample bonded to CaCO3, and along a 2 mm line for that bonded to LiTaO3 revealed variations in strain of less than 5%.

scholarly journals Nanostructured silica spin–orbit optics for modal vortex beam shaping

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Delphine Coursault ◽  
Etienne Brasselet
Keyword(s):  
Degrees Of Freedom ◽  
Incident Light ◽  
Spatial Light Modulators ◽  
Spin Orbit ◽  
Optical Elements ◽  
Light Modulators ◽  
Dynamic Phase ◽  
Optical Modes ◽  
Nanostructured Silica ◽  
Theoretical Proposal

Abstract Modality is a generic concept of wave-optics at the basis of optical information and communications. One of the challenges of photonics technologies based on optical orbital angular momentum consists in the production of a modal content for both the azimuthal and radial degrees of freedom. This basically requires shaping the complex amplitude of an incident light beam, which is usually made up from adaptive spatial light modulators or bespoke devices. Here, we report on the experimental attempt of a recent theoretical proposal [Opt. Lett. 42, 1966 (2017)] toward the production of various optical vortex modes of the Laguerre–Gaussian type relying on the spin–orbit interaction of light. This is done in the visible domain from optical elements made out of silica glass. The idea consists in exploiting the combined effects of azimuthally-varying geometric phase with that of radially-varying propagation features. The proposed approach can be readily extended to any wavelength as well as to other families of optical modes, although some dynamic phase problems remain to be solved to make it a turnkey technology.

Light beam transformation based on liquid crystal spatial light modulators

2015 ◽  
Vol 41 (1) ◽  
pp. 77-80
Author(s):  
付时尧 FU Shiyao ◽  
王彤璐 WANG Tonglu ◽  
戴坤健 DAI Kunjian ◽  
钟雷 ZHONG Lei ◽  
王庆 WANG Qing
Keyword(s):  
Liquid Crystal ◽  
Light Beam ◽  
Spatial Light Modulators ◽  
Light Modulators

scholarly journals The polymer converter for effectively connecting polymer with silica optical fibres

2016 ◽  
Vol 24 (3) ◽  
Author(s):  
P. Pura-Pawlikowska ◽  
M. Dudek ◽  
R. Wonko ◽  
P. Marć ◽  
M. Kujawińska ◽  
...  
Keyword(s):  
Light Beam ◽  
Mechanical Characteristics ◽  
Incident Light ◽  
Optical Power ◽  
Good Alternative ◽  
Optical Fibres ◽  
Incident Light Beam ◽  
Micrometer Size ◽  
Guiding Effect ◽  
Selection Of

AbstractWe present a micrometer-size polymer converter (microbridge) for connecting polymer optical fibres with silica fibres. The procedure of preparing such microstructure is based on a process of photopolymerization. A polymer converter grows as an extension of the fibres’ cores due to a self-guiding effect of the light beam in a photopolymerizable medium. Since the polymer microbridge has refractive index greater inside than outside, such a structure works as a waveguide leading the light beam between connected optical fibres. By selection of time of light exposition to the mixture and optical power of the incident light beam, it is possible to obtain a polymer converter with very good optical and mechanical characteristics. Possibility of using polymer microbridges grown directly from the fibres’ core as coupling elements between silica and polymer fibres is a good alternative for obtaining permanent coupling of such fibres.

scholarly journals Optimisation of arbitrary light beam generation with spatial light modulators

2017 ◽  
Vol 19 (9) ◽  
pp. 095605 ◽  
Author(s):  
Neal Radwell ◽  
Rachel F Offer ◽  
Adam Selyem ◽  
Sonja Franke-Arnold
Keyword(s):  
Light Beam ◽  
Spatial Light Modulators ◽  
Beam Generation ◽  
Light Modulators

scholarly journals Study The Influence of Doping Electric and Magnetic Nanoparticles on The Nonlinear Optical Properties of Nematic Liquid Crystals

2020 ◽  
Vol 18 (47) ◽  
pp. 91-99
Author(s):  
Aseel Ibrahim ◽  
Rawa Ibrahim ◽  
Ali Abdullah ◽  
Ali Baki ◽  
Ghaidaa Khudair ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Magnetic Nanoparticles ◽  
Nonlinear Optical ◽  
Incident Light ◽  
Nonlinear Optical Properties ◽  
Spatial Light Modulators ◽  
Light Modulators ◽  
The Impact ◽  
Composite Samples

The nonlinear optical properties response of nematic liquid crystal (6CHBT) and the impact of doping with two kinds of nanoparticles; Fe3O4 magnetic nanoparticles and SbSI ferroelectric nanoparticles have been studied using the non-linear dynamic method through z-scan measurement technique. This was achieved utilizing CW He-Ne laser. The pure LC and magnetic LC nanoparticle composite samples had a maximum absorption while the ferroelectric LC nanoparticle composite had a minimum absorption of the incident light. The nonlinear refractive index was positive for the pure LC and the rod-like ferronematic LC composite samples, while it was negative for the ferroelectric LC composite. The studying of the nonlinear optical properties of these types of liquid will be very helpful in the field of liquid crystal applications like display screen and spatial light modulators.          

Giant Anisotropy of Conductivity in Hydrogenated Nanocrystalline Silicon Thin Films

1998 ◽  
Vol 536 ◽  
Author(s):  
A. B. Pevtsov ◽  
N. A. Feoktistov ◽  
V. G. Golubev
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Percolation Theory ◽  
Nanocrystalline Silicon ◽  
Spatial Light Modulators ◽  
Light Emitting ◽  
Light Modulators ◽  
Silicon Thin Films ◽  
Longitudinal Conductivity ◽  
Transverse Conductivity

AbstractThin (<1000 Å) hydrogenated nanocrystalline silicon films are widely used in solar cells, light emitting diodes, and spatial light modulators. In this work the conductivity of doped and undoped amorphous-nanocrystalline silicon thin films is studied as a function of film thickness: a giant anisotropy of conductivity is established. The longitudinal conductivity decreases dramatically (by a factor of 109 − 1010) as the layer thickness is reduced from 1500 Å to 200 Å, while the transverse conductivity remains close to that of a doped a- Si:H. The data obtained are interpreted in terms of the percolation theory.

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