In-plane surface plasmonics integrated with THz Quantum cascade lasers for high collimation
Liang, G, Dupont, E, Fathololoumi, S et al. (8 more authors)
(2014)
In-plane surface plasmonics integrated with THz Quantum cascade lasers for high collimation.
In:
Optics InfoBase Conference Papers.
CLEO: Science and Innovations, 08-13 Jun 2014, San Jose, California United States.
Optical Society of American (OSA)
ISBN 9781557529992
Abstract
We report planar integration of tapered Terahertz (THz) quantum cascade lasers (QCLs) with spoof surface plasmon (SSP) structures. The SSP structure consists of one plasmonic coupler and periodically arranged scatters. The resulting surface-emitting THz beam is highly collimated with a beam divergence as narrow as 3.6°×9.7°. As the beam divergence is inverse proportional to the light emission area, this low divergence indicates a good waveguiding property of the SSP structure, while the low optical background of the beam implies a high coupling efficiency of the THz wave from the laser cavity to the SSPs. Since all the structures are in-plane, this scheme provides a promising platform where the well-established SP techniques can be employed to engineer the THz QCL beam with high flexibilities.
Metadata
Item Type:
Proceedings Paper
Authors/Creators:
Liang, G
Dupont, E
Fathololoumi, S
Wasilewski, ZR
Ban, D
Yu, SF
Li, L
Davies, AG
Linfield, E
Liu, HC
Wang, QJ
Copyright, Publisher and Additional Information:
This paper was published in Optics InfoBase Conference Papers and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/CLEO_SI.2014.STh1F.2. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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