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Applied Physics Letters / Volume 98 / Issue 23 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 98, 231105 (2011); http://dx.doi.org/10.1063/1.3597304 (3 pages)

Tuneable polaritonics at room temperature with strongly coupled Tamm plasmon polaritons in metal/air-gap microcavities

C. Grossmann1, C. Coulson1, G. Christmann1, I. Farrer1, H. E. Beere2, D. A. Ritchie2, and J. J. Baumberg1

1Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
2Semiconductor Physics Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom

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(Received 2 March 2011; accepted 16 May 2011; published online 8 June 2011)

We report strong coupling between Tamm plasmons and excitons in III–V quantum wells at room temperature in ultracompact sample designs. A high refractive index contrast air-gap mirror together with optical Tamm states at a metal/semiconductor interface tightly confines the intracavity field leading to substantial local field enhancements. Angular-resolved reflectivity spectra give clear evidence for anticrossing in the dispersion relation. Room temperature Rabi splittings of 10 meV are found in excellent agreement with simulations. Electrical control of the polariton modes is realized without need for doped mirror layers. Such air-gap microcavities open innovative possibilites for electrically tunable microcavities and polaritonic microelectromechanics.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

dispersion relations, excitons, III-V semiconductors, microcavities, mirrors, plasmons, polaritons, reflectivity, refractive index, semiconductor quantum wells, semiconductor-metal boundaries

PACS

  • 71.36.+c

    Polaritons (including photon-phonon and photon-magnon interactions)

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 71.35.-y

    Excitons and related phenomena

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3597304

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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