Journal: Optical and Quantum Electronics

Abbreviation

Opt. quantum electron.

Publisher

Springer

Journal Volumes

ISSN

0306-8919
1572-817X

Description

Filters

2002 - 200992020 - 20211
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Publications 1 - 10 of 10
  • Operator ordering, ellipticity and spurious solutions in k · p calculations of III-nitride nanostructures
    Item type: Journal Article
    Veprek, Ratko G.; Steiger, Sebastian; Witzigmann, Bernd (2009)
    Optical and Quantum Electronics
  • Modeling and optimization of non-periodic grating couplers
    Item type: Journal Article
    Moreno, Esteban; Erni, Daniel; Hafner, Christian; et al. (2002)
    Optical and Quantum Electronics
  • Investigation of the Purcell effect in photonic crystal cavities with a 3D Finite Element Maxwell Solver
    Item type: Conference Paper
    Roemer, Friedhard; Witzigmann, Bernd; Chinellato, Oscar; et al. (2007)
    Optical and Quantum Electronics
  • tdkp/AQUA: Unified modeling of electroluminescence in nanostructures
    Item type: Journal Article
    Steiger, Sebastian; Veprek, Ratko G.; Witzigmann, Bernd (2009)
    Optical and Quantum Electronics
  • Performance analysis of 1300 nm SLEDs
    Item type: Conference Paper
    Loeser, Martin; Occhi, Lorenzo; Velez, Christian; et al. (2006)
    Optical and Quantum Electronics
  • Modeling of integrated extended cavity InP/InGaAsP semiconductor modelocked ring lasers
    Item type: Other Conference Item
    Bente, Erwin A. J. M.; Barbarin, Yohan; Heck, Martijn J. R.; et al. (2008)
    Optical and Quantum Electronics
  • Bayesian optimization of quantum cascade detectors
    Item type: Journal Article
    Popp, Johannes; Haider, Michael; Franckié, Martin; et al. (2021)
    Optical and Quantum Electronics
    A Bayesian optimization algorithm in combination with a scattering based simulation approach is used for the optimization of quantum cascade detectors (QCDs). QCDs operate in the mid-infrared and terahertz regime and are, together with quantum cascade lasers, appropriate for the integration into on-chip applications such as gas sensors. Our modeling approach is based on a rate equation model and a Kirchhoff resistance network for noise modeling, using scattering rates calculated with Fermi’s golden rule, or alternatively extracted from an ensemble Monte Carlo transport approach. The appropriate surrogate model of Bayesian optimization is based on Gaussian process regression, which can handle noisy offsets on the objective function evaluations inherent in ensemble Monte Carlo simulations. Here, we focus on the optimization of a matured mid-infrared QCD design detecting at 4.7 μm. For optimization we choose as figure of merit the specific detectivity, which is a measure for the signal-to-noise ratio. As the trade-off between high extraction efficiency and low detector conductance is important for good detection performance, we search for the perfect layer composition and vary the thicknesses of different cascade layers. Due to the high-temperature requirements interesting for cost-effective and mobile on-chip sensing applications, a simulation temperature of 300 K is selected. Our optimization strategy yields an improvement of specific detectivity by a factor of ∼2−3 at room temperature using two different parameter sets. Furthermore, we investigate the sensitivity of our approach to fabrication tolerances, showing robustness of the optimized designs against growth fluctuations under fabrication conditions.
  • Harmonic balance analysis for semiconductor lasers under large-signal modulation
    Item type: Journal Article
    Odermatt, Stefan; Witzigmann, Bernd; Schmithüsen, Bernhard (2006)
    Optical and Quantum Electronics
    The dynamic characteristics of an edge-emitting laser under large-signal modulation are analyzed in the frequency domain using a harmonic balance method on device level. The simulations reveal the nonlinearities of the carrier dynamics in the quantum well region which strongly influence the optical power in the higher harmonics.
  • Alternative formulation of carrier transport in spatially-dependent laser rate equations
    Item type: Journal Article
    Jungo, M.; Erni, D.; Baechtold, W. (2004)
    Optical and Quantum Electronics
  • Large-signal simulation of semiconductor lasers on device level
    Item type: Conference Paper
    Schmithüsen, Bernhard; Odermatt, Stefan; Witzigmann, Bernd (2008)
    Optical and Quantum Electronics
Publications 1 - 10 of 10