Results 101 to 110 of about 9,378 (232)

Research on the Deflection Characteristics of Non-Mechanical Beams of Liquid Crystal Variable Retarder Cascade Polarization Gratings

open access: yesIEEE Photonics Journal
According to the research status of fast beam pointing and scanning in space laser communication, this paper proposes a beam deflection method that cascades liquid crystal tunable phase retarder with polarization grating, and realizes fast beam scanning ...
Qvan Han Wang   +5 more
doaj   +1 more source

New Vacuum Solar Telescope and Observations with High Resolution

open access: yes, 2014
The New Vacuum Solar Telescope (NVST) is a 1 meter vacuum solar telescope that aims to observe the fine structures on the Sun. The main tasks of NVST are high resolution imaging and spectral observations, including the measurements of solar magnetic ...
Bo-Rong Zhang   +20 more
core   +1 more source

Quantum interference of biphotons at a blazed grating

open access: yes, 2009
Correlations between photons are interesting for a number of applications and concepts in metrology in particular for resolution improvements in different methods of quantum imaging. Since Fock-states of N-photons of wavelength lambda in interference schemes acquire N-times the phase shift of single photons these states can appear as if they had a de ...
Ostermeyer, Martin   +2 more
openaire   +2 more sources

Wide-field-angle behavior of blazed-binary gratings in the resonance domain [PDF]

open access: green, 2000
Mane‐Si Laure Lee   +3 more
openalex   +1 more source

Entanglement of Orbital Angular Momentum States of Photons

open access: yes, 2002
So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- and four-qubit entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in
Mair, Alois   +3 more
core   +1 more source

Protecting Against Damage from Refraction of High Power Microwaves in the DIII-D Tokamak

open access: yesEPJ Web of Conferences, 2017
Several new protective systems are being installed on the DIII D tokamak to increase the safety margins for plasma operations with injected ECH power at densities approaching cutoff.
Lohr John   +13 more
doaj   +1 more source

Nearly-analogue blazed phase grating using high birefringence liquid crystal [PDF]

open access: hybrid, 2009
Noureddine Bennis   +7 more
openalex   +1 more source

Photoelectrochemical fabrication of spectroscopic diffraction gratings, phase 2 [PDF]

open access: yes
This program was directed toward the production of Echelle diffraction gratings by a light-driven, electrochemical etching technique (photoelectrochemical etching).
Carrabba, Michael M.   +5 more
core   +1 more source

Plasmonic metagratings for simultaneous determination of Stokes parameters

open access: yes, 2016
Measuring light's state of polarization is an inherently difficult problem, since the phase information between orthogonal polarization states is typically lost in the detection process.
Bozhevolnyi, Sergey I.   +2 more
core   +2 more sources

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