TY  - JOUR
AU  - Dubajić, Miloš
AU  - Daničić, Aleksandar
AU  - Vuković, Nikola
AU  - Milanović, Vitomir B.
AU  - Radovanović, Jelena V.
PY  - 2018
UR  - http://link.springer.com/10.1007/s11082-018-1639-1
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7895
AB  - In this work we theoretically investigate a possibility to use cubic nitride based multi-layer periodic nanostructure as a semiconductor metamaterial. The structure design is based on an active region of a quantum cascade laser optimized to achieve optical gain in the Terahertz (THz) spectral range. In particular, we test the GaN/AlGaN quantum well configurations, which should exhibit important advantages compared to GaAs-based structures, namely room temperature operation without the assistance of magnetic field and lower doping densities. Our numerical rate-equations model is solved self-consistently and it takes into account electron-longitudinal optical phonon scattering between all the relevant states among the adjacent periods of the structure. A global optimization routine, specifically genetic algorithm is then used to generate new gain-optimized structures. This work confirms the advantages of cubic GaN designs over GaAs ones, namely feasibility of negative refraction at room temperature without the assistance of magnetic field while keeping the doping densities of the same order of magnitude. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
T2  - Optical and Quantum Electronics
T1  - Optimization of cubic GaN/AlGaN quantum cascade structures for negative refraction in the THz spectral range
VL  - 50
IS  - 10
SP  - 373
DO  - 10.1007/s11082-018-1639-1
ER  - 

@article{
author = "Dubajić, Miloš and Daničić, Aleksandar and Vuković, Nikola and Milanović, Vitomir B. and Radovanović, Jelena V.",
year = "2018",
abstract = "In this work we theoretically investigate a possibility to use cubic nitride based multi-layer periodic nanostructure as a semiconductor metamaterial. The structure design is based on an active region of a quantum cascade laser optimized to achieve optical gain in the Terahertz (THz) spectral range. In particular, we test the GaN/AlGaN quantum well configurations, which should exhibit important advantages compared to GaAs-based structures, namely room temperature operation without the assistance of magnetic field and lower doping densities. Our numerical rate-equations model is solved self-consistently and it takes into account electron-longitudinal optical phonon scattering between all the relevant states among the adjacent periods of the structure. A global optimization routine, specifically genetic algorithm is then used to generate new gain-optimized structures. This work confirms the advantages of cubic GaN designs over GaAs ones, namely feasibility of negative refraction at room temperature without the assistance of magnetic field while keeping the doping densities of the same order of magnitude. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.",
journal = "Optical and Quantum Electronics",
title = "Optimization of cubic GaN/AlGaN quantum cascade structures for negative refraction in the THz spectral range",
volume = "50",
number = "10",
pages = "373",
doi = "10.1007/s11082-018-1639-1"
}

Dubajić, M., Daničić, A., Vuković, N., Milanović, V. B.,& Radovanović, J. V.. (2018). Optimization of cubic GaN/AlGaN quantum cascade structures for negative refraction in the THz spectral range. in Optical and Quantum Electronics, 50(10), 373.
https://doi.org/10.1007/s11082-018-1639-1

Dubajić M, Daničić A, Vuković N, Milanović VB, Radovanović JV. Optimization of cubic GaN/AlGaN quantum cascade structures for negative refraction in the THz spectral range. in Optical and Quantum Electronics. 2018;50(10):373.
doi:10.1007/s11082-018-1639-1 .

Dubajić, Miloš, Daničić, Aleksandar, Vuković, Nikola, Milanović, Vitomir B., Radovanović, Jelena V., "Optimization of cubic GaN/AlGaN quantum cascade structures for negative refraction in the THz spectral range" in Optical and Quantum Electronics, 50, no. 10 (2018):373,
https://doi.org/10.1007/s11082-018-1639-1 . .