Quantum Wells, Wires and Dots

Harrison, P.; Valavanis, Alexander

doi:10.1002/9781118923337

Cited by 393 publications

(240 citation statements)

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“…therein, shows novel quantum phenomena, due to exciton's enhanced quantum and dielectric confinement [3,4]. HOIS span dimensionalities from 3D to 0D, including intermediate dimensionalities; those between 2D and 3D are designated as quasi-2D.…”

Section: Introductionmentioning

confidence: 99%

“…HOIS span dimensionalities from 3D to 0D, including intermediate dimensionalities; those between 2D and 3D are designated as quasi-2D. The progress in classical LD semiconductors has given rise to some new types of devices [5][6][7][8][9], where this natural low cost class of LD semiconductors exhibits useful optoelectronic properties [4,[10][11][12][13][14][15] comparable to the artificial class. Examples of such devices are LEDs based on 2D hybrid semiconductors [16][17][18] which function at room temperature, as well as lately reported, LEDs based on 3D hybrid materials [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

Vassilakopoulou

Papadatos

Zakouras

et al. 2017

Journal of Alloys and Compounds

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New blends of simply synthesized quasi two-dimensional (quasi-2D) hydrophobic perovskite semiconductors, employed in high performance light emitting diodes (LEDs) which function due to excitonic energy transfer effects, are reported. These materials are self-assembled blends of 2D, quasi-2D and three-dimensional (3D) hybrid organic-inorganic semiconductors HOIS blends manifest energy transfer effects, where adjacent nanoparticles of different band gap energies (E g ) transfer optical energy to those with the lowest E g ; the suggested light emission mechanism here. LED fabrication is attained via a single deposition of the hydrophobic mixture, reducing device complexity, cost and degradability. LED's diodic behavior is observed even under light albeit its photovoltaic and photoconductive quasi-2D and 3D components. LED devices exposed for over than four months under adverse laboratory conditions, showed stable light emission. Further research on this class of quasi-2D/3D HOIS mixtures is expected to lead to novel quantum electronic devices.2

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

Vassilakopoulou

Papadatos

Zakouras

et al. 2017

Journal of Alloys and Compounds

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“…(5) highly non-linear. The specific heat capacity c p (T ) for GaAs and AlGaAs increases non-linearly with temperature according to the Debye equation [59], and a third-order polynomial fit to measured data [60] was obtained for use in (5). The thermal resistance R th of QCL ARs is both temperature-dependent and anisotropic, and can be up to ten times higher perpendicular to the quantum wells than in-plane [61,62], owing to the enhanced phonon scattering at heterointerfaces [63].…”

Section: Thermal Modelmentioning

confidence: 99%

Model for a pulsed terahertz quantum cascade laser under optical feedback

Agnew¹,

Grier²,

Taimre³

et al. 2016

Opt. Express

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Abstract:Optical feedback effects in lasers may be useful or problematic, depending on the type of application. When semiconductor lasers are operated using pulsed-mode excitation, their behavior under optical feedback depends on the electronic and thermal characteristics of the laser, as well as the nature of the external cavity. Predicting the behavior of a laser under both optical feedback and pulsed operation therefore requires a detailed model that includes laser-specific thermal and electronic characteristics. In this paper we introduce such a model for an exemplar bound-to-continuum terahertz frequency quantum cascade laser (QCL), illustrating its use in a selection of pulsed operation scenarios. Our results demonstrate significant interplay between electro-optical, thermal, and feedback phenomena, and that this interplay is key to understanding QCL behavior in pulsed applications. Further, our results suggest that for many types of QCL in interferometric applications, thermal modulation via low duty cycle pulsed operation would be an alternative to commonly used adiabatic modulation.Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. 4, 631-633 (2014). 11. G. Giuliani, M. Norgia, S. Donati, and T. Bosch, "Laser diode self-mixing technique for sensing applications," J. Opt.A 1937-1942 (2016

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“…In addition, computational cost has to be considered, especially for applications when multiple iterative solutions are required. The simplest technique that is widely used in QCL design work is shooting method (Harrison 2006). Finite difference algorithm may also be used (Juang et al 1990;Cassan 2000), in which bands nonparabolicity is included in iterative approach (Jovanović et al 2003;Thobel et al 2003;Cooper et al 2010).…”

Section: Numerical Solutions Of the Schrödinger-poisson Equationsmentioning

confidence: 99%

Monte Carlo modeling applied to studies of quantum cascade lasers

2017

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One of the commonly used approaches of solving electron transport problems in quantum cascade lasers (QCL) is the Monte Carlo (MC) method, based on semiclassical description in the framework of the Boltzmann Transport Equation. A major benefit of MC modeling is that it only relies on well-established material parameters and structure specification, in most cases without the need to use phenomenological parameters. The results of the modeling can be easily interpreted and they give microscopic insight of QCL operation. The goal of the present paper is to review the application of the MC technique to the studies of operation of QCL. The description of the components of the simulation algorithm is provided. Various physical mechanisms governing electron transport in QCL are described and their influence on the operation are reviewed.

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Quantum Wells, Wires and Dots

Cited by 393 publications

References 0 publications

Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

Model for a pulsed terahertz quantum cascade laser under optical feedback

Monte Carlo modeling applied to studies of quantum cascade lasers

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