Numerical Simulation of ZnO-Based Terahertz Quantum Cascade Lasers

Bellotti, E.; Paiella, Roberto

doi:10.1007/s11664-010-1206-4

Cited by 9 publications

(4 citation statements)

References 64 publications

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“…Structures based on wide bandgap materials GaN/AlGaN, ZnO/MgZnO have been examined by MC simulations (Bellotti et al 2008(Bellotti et al , 2009Bellotti and Paiella 2010). Fathololoumi et al (2012) designed a THz structure, for which lasing up to 200 K has been observed.…”

Section: Examples Of MC Studies Of Qclmentioning

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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Section: Examples Of MC Studies Of Qclmentioning

confidence: 99%

Monte Carlo modeling applied to studies of quantum cascade lasers

2017

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“…Even though the p doping of ZnO remains a huge challenge, it does not hinder ZnO from being a candidate for unipolar devices based on intersubband transitions (ISBTs), such as quantum cascade detectors (QCDs) [11,12], phononpolariton lasers [13], and quantum cascade lasers (QCLs) [14], especially in the THz range at high temperature [15]. In fact, for ISBTs below the optical phonon energy of ZnO [e.g., in the terahertz (THz) range], the population inversion of THz QCLs is significantly enhanced at high temperature due to the suppressed optical phonon emission rate, thus significantly enhancing the high temperature operation of THz QCLs [16,17]. However, to achieve that goal requires excellent growth quality of the material system, such as the accurate control of the layer thickness over the entire active region, the sharp heterointerfaces between different layers to reduce the detrimental effect of interface roughness, the constant doping level in all periods, and so on.…”

Section: Introductionmentioning

confidence: 99%

Observation of Intersubband Absorption in ZnO Coupled Quantum Wells

et al. 2019

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Intersubband transitions in ZnO material systems are predicted to be promising candidates for infrared and terahertz (THz) optoelectronic devices due to their unusual material properties. In particular, the temperature performance of THz quantum cascade lasers is postulated to be significantly enhanced using ZnO material systems due to their large optical phonon energy. Taking a step forward toward that goal, intersubband transitions in ZnO/Mg x Zn 1−x O asymmetric coupled quantum wells are observed on a nonpolar m plane ZnO substrate. Two absorption peaks are observed in the energy range from approximately 250 meV to approximately 410 meV at room temperature, unambiguously demonstrating the interwell coupling in the asymmetric coupled quantum wells. A theoretical model taking into account the interaction between intersubband transitions shows reasonable overall agreement with the experimental results, thus proving the strong coupling nature of the investigated system. As the building block of complex quantum structures based on intersubband transitions, the results presented show great potential applications of ZnO/Mg x Zn 1−x O material systems in infrared and THz optoelectronics and physics.

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“…It has been investigated for potential applications in terahertz quantum cascade laser for room temperature operation. The revolutionary ZnO/MgZnO heterostructure is a promising material system suitable for high temperature laser operation which has been proposed with simulation [1]. Also, an ultraviolet diode laser has been demonstrated at room temperature with very low lasing threshold current density by implement the ZnO/MgZnO quantum well structures [2].…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of ZnO/MgZnO composite structures grown by pulsed laser deposition

Yao

Gao

et al. 2011

Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications V

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In this paper, the growth of ZnO/MgZnO composite structures with a larger number of periods by pulsed laser deposition is presented. The structural and physical properties are quantitatively characterized by field-emission scanning electron microscopy, transmission electronic microscopy, X-ray diffraction, and photoluminescence. It is demonstrated that the quantum confinement effect has been observed from the composite structures at room temperature. The applications of this unique ZnO/MgZnO composite structure are also discussed.

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Numerical Simulation of ZnO-Based Terahertz Quantum Cascade Lasers

Cited by 9 publications

References 64 publications

Monte Carlo modeling applied to studies of quantum cascade lasers

Monte Carlo modeling applied to studies of quantum cascade lasers

Observation of Intersubband Absorption in ZnO Coupled Quantum Wells

Growth and characterization of ZnO/MgZnO composite structures grown by pulsed laser deposition

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