Category: sci. papers
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New study on formation and drift of space-charge domains with velocity of sound in n-type GaN
New paper by Roman Balagula et al. under the title ”Space-charge domains in n-type GaN epilayers under pulsed electric field” is published in the Applied Physics Letters. The experimental work investigates the formation and drift of space-charge domains with velocity of sound in n-type GaN. The findings defines the constraints for the design of GaN-based…
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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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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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Digital Holography in THz range
Recent work published in AIP Advanced journal by Agnieszka Siemion et. al reports on advances in Terahertz digital holography implementing two- and four-step phase shifting technique. Proposed holographic technique shows many advantages in THz imaging such as better contrast, reconstruction of 3D image and etc. The article is open access and can be reached through…
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High precision parabolic quantum wells grown using pulsed analog alloy grading technique: Photoluminescence probing and fractional-dimensional space approach
New paper by M. Karaliūnas et al. “High precision parabolic quantum wells grown using pulsed analog alloy grading technique: Photoluminescence probing and fractional-dimensional space approach” reports the findings on PL characterization with the help of fractional-dimensional space approach revealed precisely grown parabolic quantum well using molecular beam epitaxy pulsed analog alloy grading technique. The study…
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Review: Roadmap of Terahertz Imaging 2021
Impressive review by G. Valušis et al. is published in Sensors (MDPI) journal. The roadmap article is focused on the most recent advances in THz imaging with particular attention paid to the optimization and miniaturization of the THz imaging system. Although the research on preparing the review haven’t received dedicated funding, the work covers the…
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New Study on Antenna-Coupled Titanium Microbolometers
Newest study “Antenna-Coupled Titanium Microbolometers: Application for Precise Control of Radiation Patterns in Terahertz Time-Domain Systems” is published in Sensors journal from MDPI publisher. It was found that the studied Ti-microbolometers are convenient lensless sensors suitable to discriminate and control THz radiation pattern features in various wideband THz-TDS systems. The publication is open access and…
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New work by V. Janonis et al. is published in Optics Express
Most recent study by V. Janonis and co-authors “Spatial coherence of hybrid surface plasmon-phonon-polaritons in shallow n-GaN surface-relief gratings” is published in the highly ranked Optics Express journal from Optical Society of America (OSA) Publishing. Good agreement was achieved between experiment and theory paving a way for development of narrow-band thermal sources of coherent radiation in…