Results 91 to 100 of about 45,867 (290)

Wideband Substrate Integrated Waveguide Fed Open Slot Antenna Array

IEEE Access, 2020
This work investigates the use of substrate integrated waveguide fed open slot antenna (WOSA) in an array for the first time to provide a new SIW slot antenna array with wide bandwidth and single-layer structure.
Xuan Yi, Hang Wong
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Electronically Tunable Half-Mode Substrate-Integrated Waveguide Coupler

IEEE Access
This paper presents the design and implementation of a compact and highly efficient –10 dB directional coupler based on a half-mode substrate integrated waveguide cavity resonator configuration.
Laeeq Riaz, Haider Ali, Bilal Tariq Malik, Adnan Iftikhar, Muhammad Farhan Shafique, Jamal Nasir, Slawomir Koziel   +6 more
doaj   +1 more source

Technology challenges for space interferometry: the option of mid-infrared integrated optics

, 2007
Nulling interferometry is a technique providing high angular resolution which is the core of the space missions Darwin and the Terrestrail Planet Finder. The first objective is to reach a deep degree of starlight cancelation in the range 6 -- 20 microns,
A. Pradel, Angel, Angel, Beichman, Berger, Bracewell, C. Vigreux-Bercovici, Coudé du Foresto, E. LeCoarer, Fridlund, J.-E. Broquin, L. Labadie, Labadie, Labadie, Labadie, Léger, Marcuse, Mennesson, Ollivier, P. Kern, P. Labeye, Palik, Perrin, Shalem, Tien, Tien, V. Kirschner, Vigreux-Bercovici, Vigreux-Bercovici, Wallner, Wehmeier   +30 more
core   +4 more sources

Bright single-photon sources in bottom-up tailored nanowires [PDF]

, 2012
The ability to achieve near-unity light extraction efficiency is necessary for a truly deterministic single photon source. The most promising method to reach such high efficiencies is based on embedding single photon emitters in tapered photonic ...
D Dalacu, D Dalacu, E Knill, ED Minot, I Friedler, I Friedler, J Bleuse, J Claudon, J Heinrich, KE Plass, KG Lee, M Pelton, MD Kelzenberg, ME Reimer, MHM van Weert, MP van Kouwen, MT Borgström, N Gisin, N Gregersen, N Gregersen, S Nadj-Perge, S Strauf, S Strauf, T Heindel, TM Babinec, WL Barnes, YM Niquet   +26 more
core   +4 more sources

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source

Silicon-nitride waveguides for on-chip Raman spectroscopy [PDF]

, 2014
The evanescent tail of the guided modes can efficiently excite Raman active molecules located in the cladding of a waveguide. Similarly, a significant fraction of the total emitted Stokes power is evanescently coupled to the same mode.
Baets, Roel, Dhakal, Ashim, Le Thomas, Nicolas, Peyskens, Frédéric, Subramanian, Ananth, Wuytens, Pieter   +5 more
core   +1 more source

Giant Berry‐phase‐Driven X‐Ray Beam Translations in Strain‐Engineered Semiconductor Crystals

Advanced Materials, EarlyView.
Due to the Berry‐phase effect, X‐rays propagating in deformed crystals undergo large translations, interesting for X‐ray optics applications. Here, the lattice expansion observed upon H irradiation of dilute‐nitride semiconductors is exploited to engineer the deformation landscape of selectively hydrogenated GaAsN epilayers.
Marco Felici, Giorgio Pettinari, Michela Fratini, Luisa Barba, Simone Birindelli, Gaetano Campi, Silvia Rubini, Tobias Schülli, Mario Capizzi, Antonio Polimeni   +9 more
wiley   +1 more source

Electronically Controlled 35-bit Substrate Integrated Waveguide Phase Shifter

IEEE Access
A 35-bit electronically-controlled digital substrate integrated waveguide (SIW) phase shifter with high phase resolution and large phase shift range is proposed in this paper. The main part of phase shifter contains two rows of metallic vias in each side
Xingyu Pang, Yunjie Geng, Junhong Wang, Xi Li, Lin Yang, Hongwei Cai   +5 more
doaj   +1 more source

Ultra-compact silicon nitride grating coupler for microscopy systems [PDF]

, 2017
Grating couplers have been widely used for coupling light between photonic chips and optical fibers. For various quantum-optics and bio-optics experiments, on the other hand, there is a need to achieve good light coupling between photonic chips and ...
Brainis, Edouard, Jiao, Yuqing, Li, Yanlu, Tian, Bin, Van Thourhout, Dries, Wang, Jie, Xie, Weiqiang, Zhu, Yunpeng   +7 more
core   +2 more sources