نتایج جستجو برای: defect mode

تعداد نتایج: 316268  

Journal: :The British journal of ophthalmology 1991
B Sanchez-Dalmau F J Goñi M Guarro C Roig F Duch-Bordas

Symptomatic suprageniculate lesions in multiple sclerosis expressed as a visual field defect are infrequent. The present case developed a bilateral homonymous defect as the initial and unique symptom of the disease. It was confirmed by nuclear magnetic resonance imaging, which disclosed extensive demyelinating areas in both optic nerve radiations. The mode of onset, perimetric findings, and unu...

2002
Wah Tung Lau Shanhui Fan

We introduce a general designing procedure that allows us, for any given photonic crystal slab, to create an appropriate line defect structure that possesses single-mode bands with large bandwidth and low dispersion within the photonic band-gap region below the light line. This procedure involves designing a high index dielectric waveguide that is phase matched with the gap of the photonic crys...

2012
Muhammad Nor Salim Takahiro Hayashi Morimasa Murase Toshihiro Ito Shoji Kamiya

Fast remaining thickness measurement using Lamb wave is presented for the purpose of maintenance of large structures like oil storage tanks and pipe networks. This study used a laser ultrasonic source to perform a high resolution remote scanning over aluminum plates with grooved and circular defects that were modeled on corrosions in plate-like structures. The antisymmetric A0 and symmetric S0 ...

Journal: :Applied optics 2013
Fethallah Karim Omar Seddiki

In this paper, we are interested in the analysis of the transmission spectrum of several multilayer structures based on one-dimensional photonic crystals (1D PCs) infiltrated with different kinds of defect materials, such as bismuth oxide (Bi2O3), lithium niobate (LiNbO3), and E7 liquid crystal (LC). A 1D PC acting as a multichannel filter is constructed by inserting multiple Bi2O3 defect layer...

Journal: :Science 1999
Painter Lee Scherer Yariv O'Brien Dapkus Kim

A laser cavity formed from a single defect in a two-dimensional photonic crystal is demonstrated. The optical microcavity consists of a half wavelength-thick waveguide for vertical confinement and a two-dimensional photonic crystal mirror for lateral localization. A defect in the photonic crystal is introduced to trap photons inside a volume of 2.5 cubic half-wavelengths, approximately 0.03 cub...

Journal: :Optics letters 2012
Christopher Kang Sharon M Weiss Yurii A Vlasov Solomon Assefa

Photonic crystal slab cavities were investigated for increased light-matter interaction based on selective placement of sublattice hole sized defect holes inside L3 cavities. A multiple-hole defect (MHD) consisting of three defect holes placed in the regions of highest cavity mode field intensity were demonstrated through finite-difference time-domain simulations and experiments to exhibit the ...

Journal: :Theriogenology 2005
Peter J Chenoweth

Genetic sperm defects are specific sperm defects, which have been shown to have a genetic mode of transmission. Such genetic linkage, either direct or indirect, has been associated with a number of sperm defects in different species, with this number increasing with improved diagnostic capabilities. A number of sperm defects, which have proven or suspected genetic modes of transmission are disc...

2007
Benjamin B. Wagner Jerry H. Ginsberg Itzhak Green Aldo A. Ferri Olivier A. Bauchau

2013
Ajit K. Vallabhaneni Jeffrey F. Rhoads Jayathi Y. Murthy Xiulin Ruan

This work examines the impact of defects on the resonant response of single-wall carbon nanotube (CNT) resonators using classical molecular dynamics (MD) simulations. The work demonstrates that the presence of defects in CNTs leads to appreciable resonant mode splitting. A dimensionless parameter has been introduced to quantify this phenomenon. It is observed that increasing the degree of asymm...

2013
Kelsey A. Whitesell Dennis M. Callahan Harry Atwater

Nanostructured active or absorbing layers of solar cells, including photonic crystals and wire arrays, have been increasingly explored as potential options to enhance performance of thin film solar cells because of their unique ability to control light. We show that 2D photonic crystals can improve light trapping by an enhanced density of optical states and improved incoupling, and demonstrate,...

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