Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies

S. Knight, S. Schöche, V. Darakchieva, P. Kühne, J. F. Carlin, N. Grandjean, C. M. Herzinger, M. Schubert, T. Hofmann

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The effect of a tunable, externally coupled Fabry-Perot cavity to resonantly enhance the optical Hall effect signatures at terahertz frequencies produced by a traditional Drudelike two-dimensional electron gas is shown and discussed in this Letter. As a result, the detection of optical Hall effect signatures at conveniently obtainable magnetic fields, for example, by neodymium permanent magnets, is demonstrated. An AlInN/GaN-based high-electron mobility transistor structure grown on a sapphire substrate is used for the experiment. The optical Hall effect signatures and their dispersions, which are governed by the frequency and the reflectance minima and maxima of the externally coupled Fabry-Perot cavity, are presented and discussed. Tuning the externally coupled Fabry-Perot cavity strongly modifies the optical Hall effect signatures, which provides a new degree of freedom for optical Hall effect experiments in addition to frequency, angle of incidence, and magnetic field direction and strength.

Original languageEnglish (US)
Pages (from-to)2688-2691
Number of pages4
JournalOptics Letters
Volume40
Issue number12
DOIs
StatePublished - Jan 1 2015

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Hall effect
charge carriers
cavities
signatures
gases
neodymium
high electron mobility transistors
magnetic fields
permanent magnets
electron gas
sapphire
incidence
degrees of freedom
tuning
reflectance

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Knight, S., Schöche, S., Darakchieva, V., Kühne, P., Carlin, J. F., Grandjean, N., ... Hofmann, T. (2015). Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies. Optics Letters, 40(12), 2688-2691. https://doi.org/10.1364/OL.40.002688

Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies. / Knight, S.; Schöche, S.; Darakchieva, V.; Kühne, P.; Carlin, J. F.; Grandjean, N.; Herzinger, C. M.; Schubert, M.; Hofmann, T.

In: Optics Letters, Vol. 40, No. 12, 01.01.2015, p. 2688-2691.

Research output: Contribution to journalArticle

Knight, S, Schöche, S, Darakchieva, V, Kühne, P, Carlin, JF, Grandjean, N, Herzinger, CM, Schubert, M & Hofmann, T 2015, 'Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies', Optics Letters, vol. 40, no. 12, pp. 2688-2691. https://doi.org/10.1364/OL.40.002688
Knight S, Schöche S, Darakchieva V, Kühne P, Carlin JF, Grandjean N et al. Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies. Optics Letters. 2015 Jan 1;40(12):2688-2691. https://doi.org/10.1364/OL.40.002688
Knight, S. ; Schöche, S. ; Darakchieva, V. ; Kühne, P. ; Carlin, J. F. ; Grandjean, N. ; Herzinger, C. M. ; Schubert, M. ; Hofmann, T. / Cavity-enhanced optical Hall effect in twodimensional free charge carrier gases detected at terahertz frequencies. In: Optics Letters. 2015 ; Vol. 40, No. 12. pp. 2688-2691.
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