Coupled cavity terahertz quantum cascade lasers with integrated emission monitoring | Zendy

Michael Krall | Zendy; M. Martl | Zendy; Dominic Bachmann | Zendy; C. Deutsch | Zendy; A. M. Andrews | Zendy; W. Schrenk | Zendy; G. Strasser | Zendy; K. Unterrainer | Zendy

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Coupled cavity terahertz quantum cascade lasers with integrated emission monitoring

Author(s) -

Michael Krall,

M. Martl,

Dominic Bachmann,

C. Deutsch,

A. M. Andrews,

W. Schrenk,

G. Strasser,

K. Unterrainer

Publication year - 2015

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.003581

Subject(s) - terahertz radiation , laser , optics , optoelectronics , photomixing , cascade , terahertz spectroscopy and technology , semiconductor laser theory , quantum cascade laser , photon , waveguide , physics , far infrared laser , detector , materials science , terahertz metamaterials , chemistry , chromatography

We demonstrate the on-chip generation and detection of terahertz radiation in coupled cavity systems using a single semiconductor heterostructure. Multiple sections of a terahertz quantum cascade laser structure in a double-metal waveguide are optically coupled and operate either as a laser or an integrated emission monitor. A detailed analysis of the photon-assisted carrier transport in the active region below threshold reveals the detection mechanism for photons emitted by the very same structure above threshold. Configurations with a single laser cavity and two coupled laser cavities are studied. It is shown that the integrated detector can be used for spatial sensing of the light intensity within a coupled cavity.

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