Results 111 to 120 of about 246,836 (290)
Free-space optical links for space communication networks
, 2020 66 pages, 40 ...
Carrasco-Casado, Alberto +1 more
openaire +2 more sources
Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces
Advanced Optical Materials, EarlyView.Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler +8 more
wiley +1 more source
Beyond Brown: Lignin's Emerging Role in Structural Color
Advanced Optical Materials, EarlyView.Lignin, long regarded as a brown industrial byproduct, is emerging as a sustainable platform for structural color. This Perspective highlights how lignin's refractive index, intrinsic absorption, and nanoscale assembly enable tunable photonic responses in colloidal and thin‐film architectures, and outlines design strategies to advance scalable, bio ...
Ravi Shanker, Anna Justina Svagan
wiley +1 more source
Advanced Optical Materials, EarlyView.This study presents a dual‐passivating additive‐based synergetic solid‐state halide exchange (DASH) process using chlorodiphenylphosphine (CDPP), which passivates undercoordinated Pb2+ sites and releases chloride ions for uniform halide exchange. The DASH process enhances halide homogeneity and PLQY, enabling bright and spectrally stable deep‐blue ...
Jun‐Seo Lee +11 more
wiley +1 more source
Multi-Actuator Lens Systems for Turbulence Correction in Free-Space Optical Communications
PhotonicsThe implementation of efficient free-space channels is fundamental for both classical and quantum free-space optical (FSO) communication. This can be challenging for fiber-coupled receivers, due to the time variant inhomogeneity of the refractive index ...
Matteo Schiavon +4 more
doaj +1 more source
Modelling and analysis of FSO ground-to-train communications for straight and curved tracks [PDF]
, 2013 In this work, a free space optical (FSO) link for the ground-to-train communications is proposed. Analytical analysis is carried out for the case of the straight as well as curved rail tracks.
Ghassemlooy, Zabih +3 more
core
Lasers for free-space optical communications
III-Vs Review, 2001 AbstractFree-space optics (FSO) - or telecoms systems based on free space lasers (FSLs) - have attractions as an alternative to existing signal conduits such as fibre or wireless. They offer high data rates (about 1 Gb/s) and can be as much as a fifth the cost of underground fibre.
openaire +1 more source
Photochromic Diarylethene‐doped SU‐8 for Rewritable Optics and Integrated Photonic Switching
Advanced Optical Materials, EarlyView.A CMOS‐compatible photochromic host–guest material platform is realized by incorporating diarylethene molecules into SU‐8 photoresist. Reversible photoisomerization enables light‐programmable optical absorption, allowing rewritable optical patterning and port‐selective attenuation in integrated waveguides.
Yao Chang +2 more
wiley +1 more source
Nematic Cells for Digital Light Deflection [PDF]
Smectic A (SmA) materials can be used in non-mechanical, digital beam deflectors (DBDs) as fillers for passive birefringent prisms based on decoupled pairs of electrically controlled, liquid crystalline polarization rotators, like twisted nematic (TN ...
Golovin, Andrii +6 more
core +1 more source
Advanced Optical Materials, EarlyView.Thermal expansion and the thermo‐optic effect in solids are closely coupled, reflecting concurrent changes in mass density and polarizability. Using echo‐resolved THz spectroscopy, we simultaneously determine sub‐micrometer thermal expansion and complex refractive index changes of MgO and Al2O3 from 10–325 K. The analysis yields both the coefficient of
Nicolas S. Beermann +5 more
wiley +1 more source