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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3814–3824

Mid- to long-wavelength infrared plasmonic-photonics using heavily doped n-Ge/Ge and n-GeSn/GeSn heterostructures

Richard Soref, Joshua Hendrickson, and Justin W. Cleary  »View Author Affiliations


Optics Express, Vol. 20, Issue 4, pp. 3814-3824 (2012)
http://dx.doi.org/10.1364/OE.20.003814


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Abstract

Heavily doped n-type Ge and GeSn are investigated as plasmonic conductors for integration with undoped dielectrics of Si, SiGe, Ge, and GeSn in order to create a foundry-based group IV plasmonics technology. N-type Ge1-xSnx with compositions of 0 ≤ x ≤ 0.115 are investigated utilizing effective-mass theory and Drude considerations. The plasma wavelengths, relaxation times, and complex permittivities are determined as functions of the free carrier concentration over the range of 1019 to 1021 cm−3. Basic plasmonic properties such as propagation loss and mode height are calculated and example numerical simulations are shown of a dielectric-conductor-dielectric ribbon waveguide structure are shown. Practical operation in the 2 to 20 μm wavelength range is predicted.

© 2012 OSA

OCIS Codes
(130.3060) Integrated optics : Infrared
(130.5990) Integrated optics : Semiconductors
(160.4670) Materials : Optical materials
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Integrated Optics

History
Original Manuscript: October 14, 2011
Revised Manuscript: December 5, 2011
Manuscript Accepted: January 10, 2012
Published: February 1, 2012

Citation
Richard Soref, Joshua Hendrickson, and Justin W. Cleary, "Mid- to long-wavelength infrared plasmonic-photonics using heavily doped n-Ge/Ge and n-GeSn/GeSn heterostructures," Opt. Express 20, 3814-3824 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-4-3814


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