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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 1 — Jan. 13, 2014
  • pp: 274–282

Subwavelength micropillar array terahertz lasers

Michael Krall, Martin Brandstetter, Christoph Deutsch, Hermann Detz, Aaron Maxwell Andrews, Werner Schrenk, Gottfried Strasser, and Karl Unterrainer  »View Author Affiliations


Optics Express, Vol. 22, Issue 1, pp. 274-282 (2014)
http://dx.doi.org/10.1364/OE.22.000274


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Abstract

We report on micropillar-based terahertz lasers with active pillars that are much smaller than the emission wavelength. These micropillar array lasers correspond to scaled-down band-edge photonic crystal lasers forming an active photonic metamaterial. In contrast to photonic crystal lasers which use significantly larger pillar structures, lasing emission is not observed close to high-symmetry points in the photonic band diagram, but in the effective medium regime. We measure stimulated emission at 4 THz for micropillar array lasers with pillar diameters of 5 µm. Our results not only demonstrate the integration of active subwavelength optics in a terahertz laser, but are also an important step towards the realization of nanowire-based terahertz lasers.

© 2014 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(260.3090) Physical optics : Infrared, far
(230.5298) Optical devices : Photonic crystals
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 26, 2013
Revised Manuscript: November 1, 2013
Manuscript Accepted: November 24, 2013
Published: January 2, 2014

Citation
Michael Krall, Martin Brandstetter, Christoph Deutsch, Hermann Detz, Aaron Maxwell Andrews, Werner Schrenk, Gottfried Strasser, and Karl Unterrainer, "Subwavelength micropillar array terahertz lasers," Opt. Express 22, 274-282 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-1-274


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