Results 31 to 40 of about 67,297 (277)

Broadband enhancement of light emission in silicon slot waveguides [PDF]

, 2009
We investigate the light emission properties of electrical dipole emitters inside 2-dimensional (2D) and 3-dimensional (3D) silicon slot waveguides and evaluate the spontaneous emission enhancement (F_p) and waveguide coupling ratio (β).
Almeida, Barnes, Barrios, Chance, Coffa, Creatore, Ford, Galli, Galli, Harry A. Atwater, Hryciw, Jalali, Jun, Lipson, Liu, Mark L. Brongersma, Polman, Robinson, Ryan M. Briggs, Snoeks, Vredenberg, Xu, Xu, Xu, Young Chul Jun   +24 more
core   +1 more source

NUMERICAL-ANALYTICAL METHOD FOR SOLUTION TO THE PROBLEM OF ELECTROMAGNETIC WAVE RADIATION FROM FLAT WAVEGUIDE WITH FINITE NUMBER OF SLOTS [PDF]

Радиофизика и электроника, 2016
Characteristics of radiation of electromagnetic waves from flat metallic waveguide filled with a dielectric and having the finite number of not equidistant parallel slots on one side of the waveguide excited by a fundamental waveguide wave are studied ...
S. N. Vorobyov
doaj   +1 more source

Terahertz-driven linear electron acceleration [PDF]

, 2015
The cost, size and availability of electron accelerators is dominated by the achievable accelerating gradient. Conventional high-brightness radio-frequency (RF) accelerating structures operate with 30-50 MeV/m gradients. Electron accelerators driven with
Fallahi, Arya, Hong, Kyung-Han, Huang, Wenqian Ronny, Kärtner, Franz X., Miller, R. J. Dwayne, Moriena, Gustavo, Nanni, Emilio Alessandro, Ravi, Koustuban   +7 more
core   +2 more sources

Composite dielectric waveguide

Electronics Letters, 1984
Guided modes propagating in a composite dielectric waveguide are calculated by modal analysis and a least-squares boundary residual technique. The core and the external medium are multidielectric. Dispersion characteristics are presented and calculated by the above method for various combinations of structures and dielectric constants.
J. Atechian, H. Baudrand, J. Pahn
openaire   +1 more source

Design of mid-IR and THz quantum cascade laser cavities with complete TM photonic bandgap [PDF]

, 2007
We present the design of mid-infrared and THz quantum cascade laser cavities formed from planar photonic crystals with a complete in-plane photonic bandgap.
Bahriz, Michael, Colombelli, Raffaele, Crisafulli, Orion, Moreau, Virginie, Painter, Oskar   +4 more
core   +2 more sources

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Simplified Complex Permittivity Measurement of Dielectric Materials Using a Compact Waveguide and a Machine Learning Technique [PDF]

Journal of Electromagnetic Engineering and Science
The Nicolson–Ross–Weir (NRW) algorithm is widely used to extract the complex permittivity of dielectric materials. Conventional NRW-based setups typically require machining dielectrics to fit waveguide apertures and to achieve precise adjustment across ...
Min-Seok Park, Jaehoon Cho, Soonyong Lee, Kyung-Young Jung   +3 more
doaj   +1 more source

A new technique and results of measurements of dielectric and magnetic properties of loss dielectrics for vacuum tubes [PDF]

ITM Web of Conferences, 2019
A technique for measuring dielectric and magnetic properties of materials by the waveguide method is proposed in which the error, associated with the presence of gaps between the sample and the waveguide wall is eliminated by comparison with the results ...
Bogomolova Evgeniia, Galdetskiy Anatoly, Vasilev Vladimir, Alekseenkov Vladimir   +3 more
doaj   +1 more source

Nanoscale Metamaterial Optical Waveguides with Ultrahigh Refractive Indices

, 2012
We propose deep-subwavelength optical waveguides based on metal-dielectric multilayer indefinite metamaterials with ultrahigh effective refractive indices.
Babinec, Cai, Chandran, Chen, Choi, Cui, Elser, Elser, Foss, Gan, Govyadinov, Han, Huang, Jacob, Jacob, Jiang, Jie Gao, Johnson, Lin, Liu, Liu, Lu, Meng, Noginov, Noginov, Oulton, Pendry, Pendry, Sailing He, Salandrino, Schurig, Shelby, Shen, Shi, Shin, Smith, Sun, Veselago, Xiao, Xiaodong Yang, Xu, Yan, Yang, Yang, Yao, Yao, Yingran He   +46 more
core   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

Advanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang, Uwe Hübner, Anne Gärtner, Tao Chen, Joseph Köbel, Franka Jahn, Daniel Repp, Abhrodeep Dey, Henrik Schneidwind, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Matthias Zeisberger, Tanveer Ahmed Shaik, Astrid Bingel, Markus A. Schmidt, Jer‐Shing Huang, Ulf Peschel, Volker Deckert   +18 more
wiley   +1 more source