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| Azevedo, Nuno Monteiro |
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Kauppinen, Christoffer
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Air stable plasma passivation of GaAs at room temperature
- 2023Effect of atomic layer annealing in plasma-enhanced atomic layer deposition of aluminum nitride on silicon
- 2020Metalorganic vapor phase epitaxy of wurtzite InP nanowires on GaNcitations
- 2019Site-specific growth of oriented ZnO nanocrystal arrayscitations
- 2019Two-dimensional plasmons in a GaN/AlGaN heterojunctioncitations
- 2019Two-dimensional plasmons in a GaN/AlGaN heterojunction:Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronicscitations
- 2019Terahertz Emission due to Radiative Decay of Hot 2D Plasmons in AlGaN/GaN Heterojunction
- 2019Selective terahertz emission due to electrically excited 2D plasmons in AlGaN/GaN heterostructurecitations
- 2017Grass-like Alumina with Low Refractive Index for Scalable, Broadband, Omnidirectional Antireflection Coatings on Glass Using Atomic Layer Depositioncitations
- 2017MOVPE growth of GaN on 6-inch SOI-substratescitations
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article
Two-dimensional plasmons in a GaN/AlGaN heterojunction
Abstract
We report the studies on optical properties of a GaN/AlGaN heterostructure with a surface metal grating. The fabricated structures were optimized for the observation of 2D plasmon resonances in the spectral range of 2–5 THz. The spectra of the equilibrium optical transmission were experimentally investigated and the 2D plasmon resonance was found. The current-voltage characteristics of the grating sample and a reference sample without grating were measured and the dependence of the hot 2D electron temperature on electric field was established. Terahertz electroluminescence was studied in both samples in the sensitivity band of the Ge:Ga detector in electric fields of up to 400 V/cm. It has been shown that, due to the contribution of nonequilibrium 2D plasmons, the integral photoresponse signal for the sample with a surface metal grating increases 2–4 times as compared with the sample without grating, where the terahertz emission is due only to hot 2D electrons. ; Peer reviewed