Two-photon photocurrent autocorrelation using intersubband transitions at nearly-resonant excitation | Zendy

H. Schneider | Zendy; Thomas Maier | Zendy; H.C. Liu | Zendy; Martin Walther | Zendy

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Two-photon photocurrent autocorrelation using intersubband transitions at nearly-resonant excitation

Author(s) -

H. Schneider,

Thomas Maier,

H.C. Liu,

Martin Walther

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.001523

Subject(s) - physics , excitation , autocorrelation , resonance (particle physics) , two photon excitation microscopy , photon , photocurrent , atomic physics , optics , nonlinear optics , intermediate state , laser , quantum mechanics , statistics , mathematics

We investigate nonlinear mid-infrared detection via two-photon transitions involving two bound subbands and one continuum resonance in an n-type multiple quantum well. By varying the excitation energy, we have tuned the two-photon transition from resonant, yielding optimum resonant enhancement with a real intermediate state, to nearly-resonant, with a virtual but resonantly enhanced intermediate state. For autocorrelation purposes, the latter configuration improves time resolution whilst partially retaining a resonant enhancement of the two-photon transition strength.

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