Results 91 to 100 of about 41,134 (250)

Confinement‐Induced Nonlocality and Optical Nonlinearity of Transdimensional Titanium Nitride Films in the Epsilon‐Near‐Zero Region

Advanced Optical Materials, EarlyView.
The epsilon‐near‐zero (ENZ) effect in metals emerges only in nanometer‐scale films with exceptional optical quality. Titanium nitride (TiN) films grown by molecular beam epitaxy retain high crystallinity down to 2 nm and exhibit dramatically enhanced nonlinear optical responses near the ENZ region.
Fan‐Ting Tseng, I‐Hung Ho, Ting‐Jui Kuo, Shangjr Gwo, Igor V. Bondarev, Hyeyoung Ahn   +5 more
wiley   +1 more source

Increasing Vehicular Visible Light Communications Range Based on LED Current Overdriving and Variable Pulse Position Modulation: Concept and Experimental Validation. [PDF]

Sensors (Basel), 2023
Beguni C, Căilean AM, Avătămăniței SA, Potorac AD, Zadobrischi E, Dimian M.   +5 more
europepmc   +1 more source

Visible Light Communications

, 2016
329
O'Brien, D, Zeng, L, Le-Minh, H, Faulkner, G, Bouchet, O, Randel, S, Walewski, J, Rabadan Borges, J, Langer, K, Grubor, J, Lee, K, Tae Won, E   +11 more
openaire   +2 more sources

Nanopatterned Dual‐Carbon‐Dot Photonic Films With Enhanced Light Outcoupling

Advanced Optical Materials, EarlyView.
Nanoimprinted dual‐carbon‐dot/PVA films combine composition‐tunable blue–green emission with grating‐mediated directional light outcoupling. Water‐processable B‐CD and G‐CD composites are patterned by drying‐assisted nanoimprinting, producing angle‐selective emission peaks that follow the first‐order diffraction condition and exhibit reference ...
Gyudam Jeon, Heetae Ahn, Taeguen Kim, Na Young Ha   +3 more
wiley   +1 more source

Design, Implementation and Experimental Investigation of a Pedestrian Street Crossing Assistance System Based on Visible Light Communications. [PDF]

Sensors (Basel), 2022
Căilean AM, Beguni C, Avătămăniței SA, Dimian M, Popa V.   +4 more
europepmc   +1 more source

Cascading Spin‐Orbitronic Terahertz Emission in Ferromagnet/Nonmagnet Bilayers

Advanced Optical Materials, EarlyView.
While the initial generation mechanism of picosecond orbital currents remains elusive, we reveal a cascading spin–orbital transport mechanism that induces optically driven terahertz emission in ferromagnet/nonmagnet heterostructures. Using a ferromagnet with strong spin–orbit coupling, we identify a thickness‐driven transition from spin‐dominated to ...
Younghun Kim, Pinki Yadav, Byungwoo Son, Jooyoung Heo, Sejin Shin, Do‐Kyeong Ko, Rahul Mishra, Kyusup Lee   +7 more
wiley   +1 more source

Addressing Multi-User Interference in Vehicular Visible Light Communications: A Brief Survey and an Evaluation of Optical CDMA MAC Utilization in a Multi-Lane Scenario. [PDF]

Sensors (Basel), 2023
Plascencia E, Guan H, Chassagne L, Căilean AM, Barrois O, Shagdar O.   +5 more
europepmc   +1 more source

Filtered CE-OFDM for Spectral Efficiency in Visible Light Communications

IEEE Access
Constant Envelope OFDM (CE-OFDM) offers excellent robustness to nonlinear distortion and noise, but at the cost of poor spectral efficiency (SE). This paper proposes and experimentally validates a filtered variant, Filtered CE-OFDM (F-CE-OFDM), designed ...
B. M. S. R. Rosmaninho, Beatriz M. Oliveira, Vinicius N. H. Silva, Maria Do Carmo Medeiros, Paulo P. Monteiro   +4 more
doaj   +1 more source

Tailoring Amine Substitution in Fluorene and Dibenzothiophene: A Molecular Strategy for Ultralong Organic Phosphorescence

Advanced Optical Materials, EarlyView.
Tailored amine substitution in fluorene and dibenzothiophene derivatives enables systematic control of excited‐state properties and triplet population. Combined photophysical studies, TD‐DFT calculations and time‐resolved EPR reveal how charge‐transfer character, sulfur‐induced spin–orbit coupling and triplet manifold engineering cooperate to promote ...
Francesco Ruighi, Gianluca Accorsi, Eduardo Fabiano, Lorenzo Franco, Alessandro Agostini, Samuel Zatta, Leonard E. Cleve, Federica Angilè, Francesco Paolo Fanizzi, Gustavo Fernández, Agostina L. Capodilupo   +10 more
wiley   +1 more source

Improving the Robustness of Visual Teach‐and‐Repeat Navigation Using Drift Error Correction and Event‐Based Vision for Low‐Light Environments

Advanced Robotics Research, EarlyView.
Visual teach‐and‐repeat (VTR) navigation allows robots to learn and follow routes without building a full metric map. We show that navigation accuracy for VTR can be improved by integrating a topological map with error‐drift correction based on stereo vision.
Fuhai Ling, Ze Huang, Tony J. Prescott
wiley   +1 more source