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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 11 — Nov. 1, 2010
  • pp: B18–B35

Wavefront engineering for mid-infrared and terahertz quantum cascade lasers [Invited]

Nanfang Yu and Federico Capasso  »View Author Affiliations


JOSA B, Vol. 27, Issue 11, pp. B18-B35 (2010)
http://dx.doi.org/10.1364/JOSAB.27.000B18


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Abstract

We review our recent work on beam shaping of mid-infrared (mid-IR) and terahertz (THz) quantum cascade lasers (QCLs) using plasmonics. Essentials of QCLs are discussed; these include key developments, the operating principle based on quantum design, and beam quality problems associated with laser waveguide design. The bulk of the present paper is focused on the use of surface plasmons (SPs) to engineer the wavefront of QCLs. This is achieved by tailoring the SP dispersion using properly designed plasmonic structures, in particular, plasmonic Bragg gratings, designer (spoof) surface plasmon structures, and channel polariton structures. Using mid-IR and THz QCLs as a model system, various functionalities have been demonstrated, ranging from beam collimation, polarization control, to multibeam emission and spatial wavelength demultiplexing. Plasmonics offers a monolithic, compact, and low-loss solution to the problem of poor beam quality of QCLs and may have a large impact on applications such as sensing, light detection and ranging (LIDAR), free-space optical communication, and heterodyne detection of chemicals. The plasmonic designs are scalable and applicable to near-infrared active or passive optical devices.

© 2010 Optical Society of America

OCIS Codes
(120.1680) Instrumentation, measurement, and metrology : Collimation
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3300) Lasers and laser optics : Laser beam shaping
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(160.3918) Materials : Metamaterials
(250.5403) Optoelectronics : Plasmonics
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

History
Original Manuscript: July 2, 2010
Revised Manuscript: August 12, 2010
Manuscript Accepted: August 19, 2010
Published: October 11, 2010

Virtual Issues
(2010) Advances in Optics and Photonics

Citation
Nanfang Yu and Federico Capasso, "Wavefront engineering for mid-infrared and terahertz quantum cascade lasers [Invited]," J. Opt. Soc. Am. B 27, B18-B35 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-11-B18

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