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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 20 — Oct. 1, 2007
  • pp: 13272–13281

Bowtie plasmonic quantum cascade laser antenna

Nanfang Yu, Ertugrul Cubukcu, Laurent Diehl, David Bour, Scott Corzine, Jintian Zhu, Gloria Höfler, Kenneth B. Crozier, and Federico Capasso  »View Author Affiliations

Optics Express, Vol. 15, Issue 20, pp. 13272-13281 (2007)

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We report a bowtie plasmonic quantum cascade laser antenna that can confine coherent mid-infrared radiation well below the diffraction limit. The antenna is fabricated on the facet of a mid-infrared quantum cascade laser and consists of a pair of gold fan-like segments, whose narrow ends are separated by a nanometric gap. Compared with a nano-rod antenna composed of a pair of nano-rods, the bowtie antenna efficiently suppresses the field enhancement at the outer ends of the structure, making it more suitable for spatially-resolved high-resolution chemical and biological imaging and spectroscopy. The antenna near field is characterized by an apertureless near-field scanning optical microscope; field confinement as small as 130 nm is demonstrated at a wavelength of 7.0 μm.

© 2007 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(180.4243) Microscopy : Near-field microscopy
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Optics at Surfaces

Original Manuscript: August 24, 2007
Revised Manuscript: September 24, 2007
Manuscript Accepted: September 26, 2007
Published: September 27, 2007

Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics

Nanfang Yu, Ertugrul Cubukcu, Laurent Diehl, David Bour, Scott Corzine, Jintian Zhu, Gloria Höfler, Kenneth B. Crozier, and Federico Capasso, "Bowtie plasmonic quantum cascade laser antenna," Opt. Express 15, 13272-13281 (2007)

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