Results 11 to 20 of about 40,507 (308)
Group-velocity dispersion engineering of tantala integrated photonics
Optics Letters, 2020 Designing integrated photonics, especially to leverage Kerr-nonlinear optics, requires accurate and precise knowledge of refractive index across the visible to infrared spectral ranges.
Richelle Streater (9675608) +5 more
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Dispersion, Group Velocity, And Multisymplectic Discretizations
Mathematics and Computers in Simulation, 2009 This paper examines the dispersive properties of multisymplectic discretizations of linear and nonlinear PDEs. We focus on a leapfrog in space and time scheme and the Preissman box scheme. We find that the numerical dispersion relations are monotonic and
Wlodarczyk, T. H., Schober, C. M.
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SPIE Proceedings, 2010 Electromagnetic (EM) propagation velocities play an important role in the determination of power and energy flow in materials and interfaces. It is well known that group and phase velocities need to be in opposition in order to achieve negative ...
Banerjee, Partha P. +3 more
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Realizing normal group-velocity dispersion in free space via angular dispersion [PDF]
Optics Letters, 2021 It has long been thought that normal group-velocity dispersion (GVD) cannot be produced in free space via angular dispersion. Indeed, conventional diffractive or dispersive components such as gratings or prisms produce only anomalous GVD. We identify the
Layton A. Hall (14340729) +1 more
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GROUP VELOCITY DISPERSION CONTROL BY SUSPENDED- CORE SOFT-GLASS FIBER FILLED WITH CARBON DISULFIDE
Tạp chí Khoa học Đại học Đà LạtAn enhanced group velocity dispersion (GVD) control with suspended core fiber (SCF) has been investigated using numerical simulation based on the finite element method.
Tran Bao Tran Le +3 more
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Group Velocity, Phase Velocity and Dispersion in Human Calcaneus In Vivo
The Journal of the Acoustical Society of America, 2007 Commercial bone sonometers measure broadband ultrasonic attenuation (BUA) and/or speed of sound (SOS) in order to assess bone status. Phase velocity, which is usually measured in frequency domain, is a fundamental material property of bone that is ...
Keith A. Wear, Wear, Keith A.
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Dispersion of nonlinear group velocity determines shortest envelope solitons [PDF]
, 2011 We demonstrate that a generalized nonlinear Schrödinger equation (NSE), that includes dispersion of the intensity-dependent group velocity, allows for exact solitary solutions.
Bandelow, Uwe +6 more
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Flatband Slow Wave in Novel Air-Hole-Array Strip Waveguides
IEEE Photonics Journal, 2009 We design two novel air-hole-array strip waveguides: one with elliptic air holes and the other with sandglass-shaped ones. Simulation results prove that flatband modes with low group velocity and low dispersion can be obtained.
Lei Dai, Fanghua Wang, Chun Jiang
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Meikuang Anquan, 2020 Dispersion curves of Rayleigh channel waves may have “cross” between the fundamental and first higher order modes either in the phase velocities or in group velocities in the low frequency band.
HE Daxi, ZHU Peimin, SHEN Suishui, CAI Wei, WANG Wengang
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Modulational instability of discrete solitons in coupled waveguides with group velocity dispersion [PDF]
, 2006 We study temporal modulational instability of spatial discrete solitons in waveguide arrays with group velocity dispersion (GVD). For normal GVD we report existence of the strong 'neck'-type instability specific for the discrete solitons.
Vladimirov, Andrei G. +4 more
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