Results 81 to 90 of about 437,889 (325)

Photonic Hybrid Integration: Strategies and Promises of Advanced Additive Manufacturing

open access: yesAdvanced Optical Materials, EarlyView.
Heterogeneous photonic integration combines wafer bonding, transfer printing, and advanced multi‐photon lithography to realize compact, adaptable photonic systems. This review highlights breakthroughs in hybrid materials, metrology, and 4D printing, revealing how the convergence of traditional and emerging fabrication unlocks scalable, high‐performance
Zhitian Shi   +3 more
wiley   +1 more source

Le Sénégal dans l’ère de l’information (1996-2006)

open access: yesNetcom, 2008
Influenced by globalization trends, Senegal made its first steps in the era of information during the decade 1996-2006 characterized by the privatization of the national telecommunication company, the liberalization of the telecommunication sector, the ...
Olivier Sagna
doaj   +1 more source

Connecting People With Disabilities: ICT Opportunities for All [PDF]

open access: yes
This essay won 1st prize in a nationwide essay competition organized by Pakistan Telecommunication Authority on World Telecommunication and Information Society Day 2008. Theme of the Year was "Connecting People with Disabilitie: ICT Opportunities for All"
Ali, Muhammad
core   +1 more source

Ferroelectric Fluids for Nonlinear Photonics: Evaluation of Temperature Dependence of Second‐Order Susceptibilities

open access: yesAdvanced Optical Materials, EarlyView.
Nonlinear optical susceptibilities of five different materials that exhibit the ferroelectric nematic phase, as well as smectic A ferroelectric phase, are determined. The materials investigated include archetypal molecular architectures as well as mixtures showing room‐temperature ferroelectric phases.
Matija Lovšin   +7 more
wiley   +1 more source

Towards a quantum interface between telecommunication and UV wavelengths: design and classical performance

open access: yes, 2016
We propose and characterize a quantum interface between telecommunication wavelengths (1311 nm) and an Yb-dipole transition (369.5 nm) based on a second order sum frequency process in a PPKTP waveguide.
Luo, Kai-Hong   +3 more
core   +1 more source

Electroluminescence and Franz–Keldysh Modulation Observed in Sn/Ge Multi‐Quantum Wells

open access: yesAdvanced Optical Materials, EarlyView.
We investigate the optoelectronic properties of PIN diodes based on ultrathin α‐Sn/Ge multiple quantum film structures, fabricated by molecular beam epitaxy, both experimentally and theoretically. The samples exhibit a light emission spectrum in the short‐wavelength infrared range with two transitions. Furthermore, when operating as a photodetector, we
Michael Oehme   +9 more
wiley   +1 more source

Interference Calculation in Asynchronous Random Access Protocols using Diversity

open access: yes, 2015
The use of Aloha-based Random Access protocols is interesting when channel sensing is either not possible or not convenient and the traffic from terminals is unpredictable and sporadic.
Meloni, Alessio, Murroni, Maurizio
core   +1 more source

White Light Generation From YAG:Ce‐Doped Phosphate Glass‐Based Composite Fibers

open access: yesAdvanced Optical Materials, EarlyView.
The first white‐light‐emitting composite fiber based on YAG:Ce3+ phosphors in phosphate glass is developed. The glass composition is custom‐engineered to enhance thermal stability and to match YAG:Ce3+ refractive index, ensuring composite transparency.
Khaldoon Nasser   +9 more
wiley   +1 more source

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