Investigation of intersubband transition optical absorption in Zn1−xMgxO/MgO/ZnO heterostructures

Liu, Yan; Wang, Ping; Guo, Lixin; Chen, Hongyan; Yang, Han

doi:10.1016/j.spmi.2018.10.015

Cited by 9 publications

(2 citation statements)

References 46 publications

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“…ZnO is a wideband gap material with a band gap of 3.3 eV. Low dimensional structures of ZnO, together with its several alloys, such as ZnCdO, ZnMgO, and ZnBeO, have been studied (Ryu et al, 2006;Sadofev et al, 2007;Lange et al, 2011;Park et al, 2014;Pearton and Ren, 2014;Shtepliuk et al, 2015;Zhao et al, 2015;Orphal et al, 2017;Zúñiga-Pérez, 2017;Özgür et al, 2018;Liu et al, 2019;Sirkeli and Hartnagel, 2019;Yildirim, 2019;Pietrzyk et al, 2020;Park, 2020;Hong and Park, 2021;Meng et al, 2021;Yıldırım, 2021;Zhang, et al, 2022). It has been shown that ZnCdO/ZnO quantum wells are capable of emitting in the visible spectral range (Sadofev et al, 2007;Lange et al, 2011;Zúñiga-Pérez, 2017;Pietrzyk et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Intersubband Transitions in Nonpolar ZnO/BeMgZnO Quantum Wells: Effects of Physical Dimension, Concentration and Donor Level

Yıldırım

Cakir

2022

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Polarizaton properties of ZnO well layers on BeMgZnO barrier layers grown in polar and semipolar orientations have been investigated. Cases of relaxed and strained barrier layers are considered. It is found that the polarizaton difference at the interfaces leads to a built-in electric field inside the well layer as much as 8 MV cm^(-1) in magnitude. Nonpolar ZnO/BeMgZnO quantum wells have been studied in terms of intersubband transitions. The calculations have covered Be and Mg concentrations up 0.18 and 0.5, respectively. It has been found that intersubband transition (ISBT) energies ranging from 50 to 700 meV are possible. The effect of barrier thickness on the ISBT energies has been studied. The results indicate insignificant changes in ISBT energies compared to the energies.

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Section: Introductionmentioning

confidence: 99%

Intersubband Transitions in Nonpolar ZnO/BeMgZnO Quantum Wells: Effects of Physical Dimension, Concentration and Donor Level

Yıldırım

Cakir

2022

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…21,22) The structure parameters of the MgZnO/ZnO QCD system, which are necessary to calculate the dark current noise, are obtained by self-consistently solving the Schrödinger-Poisson equation. The Schrödinger equation can be written as 25)…”

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confidence: 99%

The noise characteristics of MgZnO/ZnO quantum cascade detectors

Liu¹,

Wang²,

Yang³

et al. 2019

Appl. Phys. Express

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The noise characteristics of MgZnO/ZnO quantum cascade detectors (QCDs) under dark stationary conditions are investigated by the dark noise model, which includes all the possible bound-to-bound intersubband transitions. The band structure is numerically calculated considering the built-in electric field induced by polarization. Results show that the noise dark current density, derived by the Nyquist theorem, increases with increasing temperature, but the noise curves are gradually stabilized with increasing voltage. Furthermore, the diagonal transitions related to E2 and E3 dominate the noise dark current density, and the noise can be improved by optimizing the structure of the MgZnO/ZnO QCD.

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Hole transport improvement in CdZnO/ZnO light emitting diodes with wedge shaped electron blocking layers

Kim

2023

J. Korean Phys. Soc.

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Investigation of intersubband transition optical absorption in Zn1−xMgxO/MgO/ZnO heterostructures

Cited by 9 publications

References 46 publications

Intersubband Transitions in Nonpolar ZnO/BeMgZnO Quantum Wells: Effects of Physical Dimension, Concentration and Donor Level

Intersubband Transitions in Nonpolar ZnO/BeMgZnO Quantum Wells: Effects of Physical Dimension, Concentration and Donor Level

The noise characteristics of MgZnO/ZnO quantum cascade detectors

Hole transport improvement in CdZnO/ZnO light emitting diodes with wedge shaped electron blocking layers

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