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TECHNICAL PAPERS: Micro/Nanoscale Heat Transfer

On the Group Front and Group Velocity in a Dispersive Medium Upon Refraction From a Nondispersive Medium

[+] Author and Article Information
Z. M. Zhang, Keunhan Park

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Heat Transfer 126(2), 244-249 (May 04, 2004) (6 pages) doi:10.1115/1.1668035 History: Received May 08, 2003; Revised December 23, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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Figures

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A monochromatic wave propagating in one dimension
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A monochromatic wave propagating in two dimensions
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Propagation of a modulated wave in (a) a positive-index material (PIM), and (b) a negative-index material (NIM)
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The movement of the wave group that is incident on MgO (n2=1.395) at λ0=9.091 μm(ω=2.072×1014 rad/s) from vacuum (n1=1.0), for θ1=45 deg and Δω/ω=0.1. The calculated values are ng=2.488;θg=30.44 deg; θgf=15.97 deg; Δθp=2.65 deg.
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The movement of the wave group that is incident on the NIM from vacuum (n1=1.0) at λ0=5.996 cm(ω=3.14×1010 rad/s), for θ1=45 deg and Δω/ω=0.01. The calculated values are n2=−1.262;ng=6.467;θg=−34.70 deg; θgf=4.88 deg; Δθp=2.37 deg.

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