Results 201 to 210 of about 486,399 (248)

Lossless strip-to-slot waveguide transformer

Optics Letters, 2007
We present a highly efficient integratable waveguide transformer that is capable of converting Gaussian-like waveguide modes to much more complicated non-Gaussian-like slot-waveguide modes, and vice versa. The structure consists of several pairs of complementary tapers capable of making this mode conversion virtually lossless.
Ning-Ning, Feng, Rong, Sun, Lionel C, Kimerling, Jurgen, Michel   +3 more
openaire   +2 more sources

NOEMS devices based on Slot-Waveguides

2007 Conference on Lasers and Electro-Optics (CLEO), 2007
We present device applications for Nano-Opto-Electro-Mechanical System (NOEMS) structures based on the evanescent-wave bonding acting on silicon slot-waveguides. Useful all- optical or electrooptical functionalities include: phase modulation, polarization mode dispersion, near-field probing and reconfigurable optical delay.
Vilson R. Almeida, Roberto R. Panepucci
openaire   +1 more source

A polarization-agile waveguide slot antenna

IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450), 2004
We present a new waveguide slot configuration able to radiate a circular polarization with a very low axial ratio. Both LH and RH circular polarization can be independently obtained, and therefore this configuration can be used as a polarization agile antenna.
MONTISCI, GIORGIO, MAZZARELLA, GIUSEPPE, MUSA M.   +2 more
openaire   +2 more sources

Polymeric slot waveguide at visible wavelength

Optics Letters, 2012
Polymeric slot waveguide structure, which pushes the mode field toward the surrounding media, was designed and characterized. The slot waveguide was fabricated by using nanoimprint lithography, and the operation of the slot was demonstrated at 633 nm wavelength with an integrated Young interferometer.
Hiltunen, Jussi, Stenberg, P., Petäjä, Jarno, Heinonen, E., Vahimaa, P., Karioja, P., Hiltunen, Marianne   +7 more
openaire   +4 more sources

1 × 4 MMI visible light wavelength demultiplexer based on a GaN slot-waveguide structure

Photonics and Nanostructures - Fundamentals and Applications, 2018
High transmission losses are the key problem that limits the performance of visible light communication systems, which work on wavelength division multiplexing (WDM) technology.
Tamir Shoresh, Nadav Katanov, D. Malka
semanticscholar   +1 more source

High Figure of Merit Electro-Optic Modulator Based on Graphene on Silicon Dual-Slot Waveguide

IEEE Journal of Quantum Electronics, 2018
A novel electro-optic modulator based on graphene on silicon (GoS) dual-slot waveguide is proposed, utilizing the electro-absorption and electro-refraction effect of graphene.
Lanting Ji, Yang Gao, Yan Xu, Xiaoqiang Sun, Chi Wu, Yuan-da Wu, Da-ming Zhang   +6 more
semanticscholar   +1 more source

Suppression of slot mode in slotted waveguide antennas

IEEE Transactions on Antennas and Propagation, 1975
It has been found experimentally that the efficiency of radiation of the slot mode in slotted waveguide antennas increases with the slot width. The excitation of the slot mode can be prevented by covering the slot with a thin film of metal. Alternatively, the slot may be covered with a sheet of dielectric to suppress the slot mode.
R. Garg, K. Gupta
openaire   +1 more source

Numerical analysis of various plasmonic MIM/MDM slot waveguide structures

International Journal of System Assurance Engineering and Management, 2022
C. Pittala, Rajeev Ratna Vallabhuni, V. Vijay, Usha Rani Anam, K. Chaitanya   +4 more
semanticscholar   +1 more source

Slab waveguide theory for general multi-slot waveguide

Journal of Modern Optics, 2016
AbstractOptical devices based on slot waveguide are of considerable interest in numerous applications due to the distinct feature of strong electric field confinement in a low-refractive index region. A theoretical model based on multi-slab waveguide theory is used to reveal the physical mechanism of the slot waveguide.
ZiChun Le, LiXiang Yin, Yu Zou, Xiang Wu
openaire   +1 more source

Epsilon-Near-Zero Si Slot-Waveguide Modulator

ACS Photonics, 2018
We experimentally demonstrate a broadband electro-absorption modulator exploiting indium tin oxide (ITO) as the active switching material.
Xiaoge Liu, K. Zang, Ju-hyung Kang, Junghyun Park, J. Harris, P. Kik, M. Brongersma   +6 more
semanticscholar   +1 more source