Results 61 to 70 of about 19,065 (260)

Coherent Multimode OAM Superpositions for Multidimensional Modulation

IEEE Photonics Journal, 2014
The generation, propagation, and detection of high-quality and coherently superimposed optical vortices, carrying two or more orbital angular momentum (OAM) states, is experimentally demonstrated using an optical arrangement based on spatial light ...
Jaime A. Anguita, Joaquin Herreros, Ivan B. Djordjevic   +2 more
doaj   +1 more source

Red‐Sensitive Photopolymerizable Glass for Fabrication of Holographic Optical Elements

Advanced Optical Materials, EarlyView.
This study presents a novel photopolymerizable glass capable of optical patterning using red‐wavelength laser exposure. Red‐light sensitivity was achieved through the incorporation of a photoinitiating system composed of methylene blue (MB) and N‐phenylglycine (NPG).
Jamshed Aftab, Izabela Naydenova, Tatsiana Mikulchyk   +2 more
wiley   +1 more source

Physical-Layer Security in Orbital Angular Momentum Multiplexing Free-Space Optical Communications

IEEE Photonics Journal, 2016
The physical-layer security of a line-of-sight (LOS) free-space optical (FSO) link using orbital angular momentum (OAM) multiplexing is studied. We discuss the effect of atmospheric turbulence to OAM-multiplexed FSO channels.
Xiaole Sun, Ivan B. Djordjevic
doaj   +1 more source

Frontier Progress of Unmanned Aerial Vehicles Optical Wireless Technologies

Sensors, 2020
With the continuous maturity of unmanned aerial vehicles (UAV) in materials, communications, and other related technologies, the UAV industry has developed rapidly in recent years.
Jupeng Ding, Hongye Mei, Chih-Lin I, Hui Zhang, Wenwen Liu   +4 more
doaj   +1 more source

Dual‐Function Hole Injection Layer Created via p‐Type Doping for High‐Performance InP‐Based Quantum‐Dot Light‐Emitting Diode

Advanced Optical Materials, EarlyView.
A crosslinkable hole injection layer (HIL) is developed by incorporating the TPFB p‐type dopant into a VNPB host, which produces a robust network upon annealing at 200°C. When integrated into QLED devices, this engineered HIL significantly suppresses leakage current and enhances charge balance, remarkably improving the external quantum efficiency ...
Juwan Lee, Jeong Ha Hwang, Sinhui Min, Heeeun Kang, Min Jung Choi, Jaehoon Lim, Jinseck Kim, Donggu Lee   +7 more
wiley   +1 more source

Channel Correlation-Based Adaptive Power Transmission for Free-Space Optical Communications

Photonics
Free-space optical (FSO) communication has received widespread attention as a high-bandwidth, low-latency communication technique. However, the scintillation effect caused by atmospheric turbulence leads to intensity fluctuations of the transmission ...
Bai-Shan Zhao, Peng-Fei Lv, Yan-Qing Hong   +2 more
doaj   +1 more source

The Role of Charge Transfer and Linker States in the Magnetoluminescence of a Diradical With Two Spatially Proximate Triarylmethyl Units

Advanced Optical Materials, EarlyView.
Magnetoluminescent (ML) diradicals exhibit field‐dependent emission due to magnetic field‐dependent spin state populations and spin‐dependent emission properties. In this work, quantum chemical calculations applied to the first reported ML diradical provide evidence of the different deactivation pathways of the excited singlet and triplet states and ...
Fatemeh Mamusi, Jordi Ribas‐Ariño, Mercè Deumal, Maria Fumanal   +3 more
wiley   +1 more source

Controlling the Spatial Coherence of an Optical Source Using a Spatial Filter

Applied Sciences, 2018
This paper presents the theory for controlling the spectral degree of coherence via spatial filtering. Starting with a quasi-homogeneous partially coherent source, the cross-spectral density function of the field at the output of the spatial filter is ...
Milo W. Hyde
doaj   +1 more source

Engineering Energy Harvesting Pathways in Mn‐Yb‐Doped Perovskite Nanocrystals

Advanced Optical Materials, EarlyView.
Mn‐Yb codoping in metal halide perovskite nanocrystals establishes dual‐channel energy reservoirs that capture charge carriers and drip‐feed them back to the host on millisecond timescales. This synergistic recycling mechanism overcomes prompt nanosecond recombination limitations, enabling an eight‐fold enhancement in photocatalytic CO2​ reduction ...
Manoj Sharma, Chang Cao, Pria Ramkissoon, Hanchen Li, Nadine J. Schrenker, Naufan Nurrosyid, Anthony S. R. Chesman, Junhong Yu, Joanne Etheridge, Trevor A. Smith, Akshat Tanksale, Jacek. J. Jasieniak   +11 more
wiley   +1 more source

Turbulence-resistant high speed free-space optical communications using MUTC photodiodes

Results in Optics
In free-space optical (FSO) communication systems, atmospheric turbulence induces scintillation of received optical power. Higher transmission optical power can compensate turbulence-induced scintillation and other channel attenuation.
Beibei Cui, Shanyong Cai, Liqian Wang, Zhiguo Zhang   +3 more
doaj   +1 more source