Author: Dr. Mindaugas Karaliūnas
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Dissipative Parametric Gain in a GaAs/AlGaAs Superlattice in PHYSICAL REVIEW LETTERS
New study is published in the journal “Physical Review Letters” from American Physical Society in the field of parametric generation of EM oscillations in GHz-THz frequency range. The work reports on the first observation of the dissipative parametric generation in a subcritically doped GaAs/AlGaAs superlattice (SL) subjected to a DC bias and a microwave pump.…
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THz Atelier participated at the Franco-German Terahertz Conference (FGTC) 2022
The second FGTC took place in La Grande Motte, France, from 16th to 19th of May. THz Atelier presented their work on AlGaN/GaN HEMT based detectors and emitters. https://terahertz2022.sciencesconf.org/
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Rusnė Ivaškevičiūtė-Povilauskienė apie gyvybės paieškas kosmose LRT laidoje ,,Mokslas Skubantiems”
Godos Raibytės radio laidoje ,,Mokslas Skubantiems” apie gyvybės paieškas kosmose pasakoja THz fotonikos laboratorijos doktorantė Rusnė Ivaškevičiūtė-Povilauskienė, kuri 2017 m. stažavosi NASA AMES tyrimų centre. Laidos įrašas LRT mediatekoje.
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High-Frequency and High-Power Performance of n-Type GaN Epilayers with Low Electron Density Grown on Native Substrate
The article by Roman M Balagula et al. just published in the journal MDPI Materials. The study is aimed towards the high frequency response properties of the n-type GaN epilayers on a native stubstrates. The results indicate new practical possibilities of the GaN material controlled by an external electric field for the development of novel…
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Development of Quaternary InAlGaN Barrier Layer for High Electron Mobility Transistor Structures
Work by J. Jorudas et al. was recently published in the MDPI Materials journal reporting about the development of high electron mobility transistor structures based on quaternary lattice matched InAlGaN barrier layer. The thorough study on the morphological, optical and electrical properties of the layers is accomplished aiming towards application for microwave power and terahertz…
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New work published concerning advantages of optical modulation in terahertz imaging for study of graphene layers
The newest study was published in Journal of Applied Physics by Rusnė Ivaškevičiūtė-Povilauskienė et al. about the advantages of optical modulation in terahertz imaging for study of graphene layers. It was demonstrated that optical modulation together with simultaneous terahertz (THz) imaging application enables an increase in contrast by an order of magnitude, thereby illustrating the…
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Smalsumo genas THz fotonikos laboratorijoje
Rolando Maskoliūno vedamoje laidoje ”Smalsumo genas” (transliuojama per LRT) kalbama apie metamedžiagas ir terahercų technologiją. Apie vykdomus metamedžiagų tyrimus FTMC pasakoja Dr. Dalius Seliuta, o apie terahercų taikymus — Dr. Linas Minkevičius. Laidos įrašą galima pamatyti čia.
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Annual Table Football Championship!
Traditional THz Atelier Table Football Championship was held just before Christmas. Ten participants registered to this event to prove themself as skillful players. Five teams were competing for the very nice looking newly established prize. The prize is introduced this year and now will pass every year to new champions. The teams were created randomly…
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Season’s Greetings!
THz Atelier team wishes you Merry Christmas and Happy New Year! Let the year of 2022 (or 12022 in Holocene calendar proposed by Cesare Emiliani) be the most fascinating and prosperous.
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Lithuanian patent “Broadband high-frequency generating / amplifying device, using semiconductor superlattices” by Gintaras Valušis, Kirill Alekseev, Vladislovas Čižas, Linas Minkevičius, Natalia Alexxeva, Dalius Seliuta, Liudvikas Subačius ( LT2021567).
New principle and at the same time a new type of compact high-frequency radiation source operating at room temperature that can be placed on a semiconductor chip is suggested. It is broadband and can operate in the both GHz and THz frequency bands. Operation of the device relies on principles of the quantum optoelectronics (Esaki-Tsu…