Results 51 to 60 of about 9,378 (232)
Sensors, 2022 We propose to achieve multichannel information transmission in free space by means of variously polarized beams. The interaction of vortex beams of various orders with the main polarization states is theoretically analyzed.
Sergey V. Karpeev +4 more
doaj +1 more source
Liquid-Crystal Blazed-Grating Beam Deflector [PDF]
, 2000 A transmission-type nonmechanical multiple-angle beam-steering device that uses liquid-crystal blazed grating has been developed. Sixteen steering angles with a contrast ratio of 18 has been demonstrated.
Maker, Paul +4 more
core
Reconciliation of generalized refraction with diffraction theory
, 2012 When an electromagnetic wave is obliquely incident on the interface between two homogeneous media with different refractive indices, the requirement of phase continuity across the interface generally leads to a shift in the trajectory of the wave. When a
David R. Smith +9 more
core +1 more source
Light‐Activated Micromotors in Air Propelled by Thermal Convection
Advanced Materials, EarlyView.Near‐infrared‐driven micromotors in air can overcome gravity and generate convective motion by a light‐induced thermal mechanism driven by a temperature gradient in the air caused by the interaction of the gold nanoparticles present on the surface of ZnO and NIR irradiation.
Pedro Mena‐Giraldo +6 more
wiley +1 more source
Applied Sciences, 2020 Axicon is an interesting optical element for its optical properties. This paper presents an approach to dynamically generated tunable axicons with a spatial light modulator (SLM).
Zhongsheng Zhai +3 more
doaj +1 more source
Advanced Materials Technologies, EarlyView.A low‐cost, maskless visible light photopatterning system has been developed by combining a consumer‐grade projector with a single Fresnel lens, generating the Fresnel Lens Integrated Projector (FLIP) system. FLIP enables flexible photopatterning of solid and gel films with features down to 30 µm and 135 µm, respectively.
Sridaran Rajagopal +2 more
wiley +1 more source
Two-dimensional grating magneto-optical trap [PDF]
, 2017 We demonstrate a two-dimensional grating magneto-optical trap (2D GMOT) with a single input cooling laser beam and a planar diffraction grating using $^{87}$Rb. This configuration increases experimental access when compared with a traditional 2D MOT.
Imhof, Eric +5 more
core +3 more sources
Step Function in Momentum Space by a Metagrating
Advanced Optical Materials, EarlyView.This work demonstrates how the symmetry of the angular transmittance could be broken by a metagrating where the diffraction channels alleviate the requirement for enforcing absorbance. The metagrating retroreflects incident waves with positive incidence angles and transmits waves with negative incidence angles.
Mahmoud A. A. Abouelatta +3 more
wiley +1 more source
Building a CCD Spectrograph for Educational or Amateur Astronomy [PDF]
, 2002 We discuss the design of an inexpensive, high-throughput CCD spectrograph for a small telescope. By using optical fibers to carry the light from the telescope focus to a table-top spectrograph, one can minimize the weight carried by the telescope and ...
Charles B. Hughes +4 more
core +1 more source
Co‐Solvent‐Aided Opto‐Thermophoretic Printing of Gold Nanorod Assemblies
Advanced Optical Materials, EarlyView.A focused laser beam creates a thermal gradient, driving the gold nanorods and polymer coils toward the heated region of the glass substrate, i.e, the laser spot. After the adsorption of the polymer on the gold surface, the nanorods start to assemble onto the surface in a ring‐shaped pattern that grows radially until the beam is turned off.
Ana Jiménez Amaya +4 more
wiley +1 more source