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Pulsed dipole radiation in a transformation-optics wedge waveguide designed by azimuthal space compression

Authors
Kim, HeungjoonPack, Seung PilYi, YunKim, Hwi
Issue Date
23-9월-2013
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.21, no.19, pp.22532 - 22539
Indexed
SCIE
SCOPUS
Journal Title
OPTICS EXPRESS
Volume
21
Number
19
Start Page
22532
End Page
22539
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/102133
DOI
10.1364/OE.21.022532
ISSN
1094-4087
Abstract
A transformation-optics wedge waveguide designed for the simultaneous collection and directional collimation of pulsed dipole radiation is described and tested with numerical simulation. Azimuthal compression of free space toward a narrow fan-shaped waveguide sector allows dipole pulse radiation in free space to be transformed into a directional non-dispersive pulse propagating within that sector. The collection and collimation ability of the proposed structure is compared with classical approaches using metallic wedge mirrors and parabolic mirrors, which inherently allow multiple internal reflections and thus generate significant pulse distortion and low light-collection efficiency. It is shown that the optical pulse generated by the dipole and propagated through the proposed transformation-optics waveguide maintains its original shape within the structure, and demonstrates enhanced optical power. (c) 2013 Optical Society of America
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