Results 131 to 140 of about 847,683 (321)

Visible light communications: Challenges and possibilities

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 2008
Solid-state lighting is a rapidly developing field. White-light and other visible LEDs are becoming more efficient, have high reliability and can be incorporated into many lighting applications. Recent examples include car head-lights based on white LEDs, and LED illumination as an architectural feature.
O'Brien, D, Zeng, L, Le-Minh, H, Faulkner, G, Walewski, J, Randel, S, IEEE   +6 more
openaire   +2 more sources

Elucidating the Mechanism behind the Enhancement of Persistent Luminescence in ZnGa2O4: Cr3+ Nanoparticles upon H2O2 Exposure

Advanced Optical Materials, EarlyView.
ABSTRACT Persistent luminescence (PersL) materials exhibit prolonged emission of light, lasting from seconds to hours after stopping the excitation. At the nanoscale, they have attracted considerable interest for applications in in vivo imaging, photodynamic therapy, and biosensing.
Celina Matuszewska, Izabel Mazon Anselmo, Mathilde Chaboud, Dimitri Mercier, Zied Ferjaoui, Cyrille Richard, Bruno Viana, Corinne Chaneac   +7 more
wiley   +1 more source

Robust Precoding for Multi-User Visible Light Communications with Quantized Channel Information. [PDF]

Sensors (Basel), 2022
Muñoz O, Pascual-Iserte A, San Arranz G.   +2 more
europepmc   +1 more source

Bay‐functionalized [7]Helicene Bilayer Nanographenes

Advanced Optical Materials, EarlyView.
Bay‐functionalized [7]helical bilayer nanographenes are synthesized via a scalable, modular strategy enabling late‐stage diversification. Tailored methoxy, diketone, and phenazine substitutions precisely tune redox, photophysical, and chiroptical properties, delivering strong electronic circular dichroism and bright circularly polarized luminescence ...
Anmol Thanai, Vikas Sharma, Louis Minion, Hassan Khan, Hadeel Abbas, George F. S. Whitehead, Avantika Hasija, Jessica Wade, Matthew John Fuchter, Ashok Keerthi   +9 more
wiley   +1 more source

A Novel Hybrid Dimming Control Scheme for Visible Light Communications

IEEE Photonics Journal, 2017
A dimming control scheme that combines analog dimming and spatial dimming is proposed. The basic idea of the combined scheme is that both the direct current bias level of each individual light-emitting diode (LED) and the number of glared LEDs are ...
Yang Yang, Zhimin Zeng, Julian Cheng, Caili Guo   +3 more
doaj   +1 more source

Recent Advances in Micro-LEDs Having Yellow-Green to Red Emission Wavelengths for Visible Light Communications. [PDF]

Micromachines (Basel), 2023
James Singh K, Huang WT, Hsiao FH, Miao WC, Lee TY, Pai YH, Kuo HC.   +6 more
europepmc   +1 more source

Quasi‐Single‐Mode Polaritonic Crystal for Hyperbolic Phonon‐Polaritons

Advanced Optical Materials, EarlyView.
Near‐field study of the polaritonic Fourier crystal with α‐MoO3 reveals that the hyperbolic phonon‐polaritons within the Type‐I Reststrahlen band may form a quasi‐single‐mode Bloch wave where only the fundamental mode propagates in the crystal. Our results demonstrate the realization of a quasi‐single‐mode regime for the inherently multimode hyperbolic
Sergey G. Menabde, Yongjun Lim, Alexey Y. Nikitin, Pablo Alonso‐González, Jacob T. Heiden, Heerin Noh, Seungwoo Lee, Min Seok Jang   +7 more
wiley   +1 more source

New Bounds on Capacity Region of Multiple Access Channels in Visible Light Communications. [PDF]

Entropy (Basel), 2022
Yang R, Li B, Ma S, Wu Y, Li Z, Li S.
europepmc   +1 more source

Optical Diversity and Nanostructural Organization in the Colored Scales of Sternotomis

Advanced Optical Materials, EarlyView.
Vivid colors in Sternotomis beetles originate from nanoscale photonic architectures embedded within individual scales. Here, we provide a comparative optical and structural analysis of 57 scale types that reveal how ordered, quasi‐ordered, and disordered 3D networks tune color, saturation, and angular response.
Viola Bauernfeind, Viola V. Vogler‐Neuling, Ilja Gunkel, Primož Pirih, Ullrich Steiner, Bodo D. Wilts   +5 more
wiley   +1 more source

DRL-Based IRS-Assisted Secure Hybrid Visible Light and mmWave Communications

IEEE Open Journal of the Communications Society
This paper explores a new advancement in physical layer security (PLS) techniques, focusing on the integration of Intelligent Reflecting Surfaces (IRS).
Danya A. Saifaldeen, Abdullatif M. Al-Baseer, Bekir S. Ciftler, Mohamed M. Abdallah, Khalid A. Qaraqe   +4 more
doaj   +1 more source