Search

Your search keyword '"Vengris Mikas"' showing total 349 results
Start Over Author "Vengris Mikas"
349 results on '"Vengris Mikas"'

1. 3D nanopolymerization and damage threshold dependence on laser wavelength and pulse duration

Author

Samsonas Danielius, Skliutas Edvinas, Čiburys Arūnas, Kontenis Lukas, Gailevičius Darius, Berzinš Jonas, Narbutis Donatas, Jukna Vytautas, Vengris Mikas, Juodkazis Saulius, and Malinauskas Mangirdas

Subjects
3d printing, multi-photon phenomena, non-linear absorption, optical damage threshold, photo-polymerization, ultrashort laser pulses, Physics, QC1-999
Abstract

The dependence of the polymerization and optical damage thresholds in multi-photon polymerization (MPP) lithography was studied using a broadly-tunable laser system with group delay dispersion (GDD) control. The order of non-linearity and the light–matter interaction mechanisms were investigated using the resolution bridges method for non-photosensitized SZ2080TM and photosensitized SZ2080TM + IRG369 prepolymers. Energy deposition, voxel dimension growth, and the size of the dynamic fabrication window (DFW) were measured in the 700–1300 nm wavelength range at three different pulse durations measured at the sample – 100, 200 and 300 fs. Polymerization was observed at all wavelengths and pulse durations without significant differences in the achieved minimal spatial dimension (

Published
2023
Full Text
View/download PDF

2. Perovskite nanowire lasers on low-refractive-index conductive substrate for high-Q and low-threshold operation

Author

Markina Daria I., Pushkarev Anatoly P., Shishkin Ivan I., Komissarenko Filipp E., Berestennikov Alexander S., Pavluchenko Alexey S., Smirnova Irina P., Markov Lev K., Vengris Mikas, Zakhidov Anvar A., and Makarov Sergey V.

Subjects
cspbbr3, fabry–pérot cavity, lasing, nanolaser, nanowire, perovskite, ultrahigh quality factor, Physics, QC1-999
Abstract

Over the last five years, inorganic lead halide perovskite nanowires have emerged as prospective candidates to supersede standard semiconductor analogs in advanced photonic designs and optoelectronic devices. In particular, CsPbX3 (X = Cl, Br, I) perovskite materials have great advantages over conventional semiconductors such as defect tolerance, highly efficient luminescence, and the ability to form regularly shaped nano- and microcavities from solution via fast crystallization. However, on the way of electrically pumped lasing, the perovskite nanowires grown on transparent conductive substrates usually suffer from strong undesirable light leakage increasing their threshold of lasing. Here, we report on the integration of CsPbBr3 nanowires with nanostructured indium tin oxide substrates possessing near-unity effective refractive index and high conductivity by using a simple wet chemical approach. Surface passivation of the substrates is found out to govern the regularity of the perovskite resonators’ shape. The nanowires show room-temperature lasing with ultrahigh quality factors (up to 7860) which are up to four times higher than that of similar structures on a flat indium tin oxide layer, resulting in more than twofold reduction of the lasing threshold for the nanostructured substrate. Numerical modeling of eigenmodes of the nanowires confirms the key role of low-refractive-index substrate for improved light confinement in the Fabry–Pérot cavity which results in superior laser performance.

Published
2020
Full Text
View/download PDF

3. Nanostructured Multilayer Coatings for Spatial Filtering

Author

Grineviciute, Lina, Babayigit, Ceren, Gailevičius, Darius, Peckus, Martynas, Turduev, Mirbek, Tolenis, Tomas, Vengris, Mikas, Kurt, Hamza, and Staliunas, Kestutis

Subjects
Physics - Optics
Abstract

Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such conventional filtering requires access to the far-field domain. In microlasers, however, conventional filtering is impossible due to the lack of space in micro-resonators to access the far-field. Therefore, a novel concept for more compact and efficient spatial filtering is necessary. In this study, we propose and demonstrate a conceptually novel mechanism of spatial filtering in the near-field domain, by a nanostructured multilayer coating - a 2D photonic crystal structure with a periodic index modulation along the longitudinal and transverse direction to the beam propagation. The structure is built on a nano-modulated substrate, to provide the transverse periodicity. The physical vapor deposition is used to provide self-repeating modulation in the longitudinal direction. We experimentally demonstrate a 5 micron thick photonic multilayer structure composed of nanostructured multiple layers of alternating high- and low-index materials providing spatial filtering in the near-infrared frequencies with 2{\deg} low angle passband. The proposed photonic structure can be considered as an ideal component for intracavity spatial filtering in microlasers.

Published
2020

10. Singlet fission in heterogeneous lycopene aggregates

Author

Veremeienko, Vasyl, primary, MAGNE, Chloe, additional, Ha-Thi, Minh-Huong, additional, Arteni, Ana, additional, Pascal, Andrew, additional, Vengris, Mikas, additional, Pino, Thomas, additional, Bruno, Robert, additional, and Llansola-Portoles, Manuel, additional

Published
2023
Full Text
View/download PDF

11. X-photon laser direct write 3D nanolithography

Author

Skliutas, Edvinas, primary, Samsonas, Danielius, additional, Čiburys, Arūnas, additional, Kontenis, Lukas, additional, Gailevičius, Darius, additional, Berzinš, Jonas, additional, Narbutis, Donatas, additional, Jukna, Vytautas, additional, Vengris, Mikas, additional, Juodkazis, Saulius, additional, and Malinauskas, Mangirdas, additional

Published
2023
Full Text
View/download PDF

17. X-photon laser direct write 3D nanolithography

Author

Skliutas, Edvinas, primary, Samsonas, Danielius, additional, Čiburys, Arūnas, additional, Kontenis, Lukas, additional, Gailevičius, Darius, additional, Berzinš, Jonas, additional, Narbutis, Donatas, additional, Jukna, Vytautas, additional, Vengris, Mikas, additional, Juodkazis, Saulius, additional, and Malinauskas, Mangirdas, additional

Published
2022
Full Text
View/download PDF

21. Biological systems: Applications and perspectives

Author

Fidder, Henk, Heyne, Karsten, Schenkl, Selma, van Mourik, Frank, van der Zwan, Gert, Haacke, Stefan, Chergui, Majed, Vengris, Mikas, Larsen, Delmar S., Papagiannakis, Emmanouil, Kennis, John T. M., van Grondelle, Rienk, Brüggemann, Ben, May, Volkhard, Corral, Inés, González, Leticia, Lauer, Alexandra, Meerbach, Eike, Schütte, Christof, Horenko, Illia, Schmidt, Burkhard, Wolf, Jean-Pierre, Castleman, A.W., Jr., editor, Toennies, J.P., editor, Yamanouchi, K., editor, Zinth, W., editor, Kühn, Oliver, editor, and Wöste, Ludger, editor

Published
2007
Full Text
View/download PDF

23. X-photon laser direct write 3D nanolithography

Author

Malinauskas, Mangirdas, primary, Skliutas, Edvinas, additional, Samsonas, Danielius, additional, Čiburys, Arūnas, additional, Kontenis, Lukas, additional, Gailevicius, Darius, additional, Narbutis, Donatas, additional, Jukna, Vytautas, additional, Vengris, Mikas, additional, and Juodkazis, Saulius, additional

Published
2022
Full Text
View/download PDF

31. Qualitative comparison between different biopolymers for usage in two-photon polymerization towards liver regeneration

Author

Ežerskytė, Eglė, primary, Vengris, Mikas, additional, Gineitis, Karolis, additional, Merkininkaitė, Greta, additional, Leber, Bettina, additional, Vargalis, Rokas, additional, Stiegler, Philipp, additional, Schemmer, Peter, additional, Šakirzanovas, Simas, additional, Kielaitė-Gulla, Aistė, additional, Strupas, Kęstutis, additional, and Jonušauskas, Linas, additional

Published
2022
Full Text
View/download PDF

32. Decomposing the Excited State Dynamics of Carotenoids in Light Harvesting Complexes and Dissecting Pulse Structures from Optimal Control Experiments

Author

Papagiannakis, Emmanouil, van Stokkum, Ivo H. M., van Grondelle, Rienk, Vengris, Mikas, Valkunas, Leonas, Cogdell, Richard J., Larsen, Delmar S., Castleman, A. W., Jr., editor, Toennies, J. P., editor, Zinth, W., editor, Yamanouchi, K., editor, Corkum, Paul, editor, Jonas, David M., editor, Miller, R. J. Dwayne., editor, and Weiner, Andrew M., editor

Published
2007
Full Text
View/download PDF

34. Ultrafast excited and ground-state isomerization dynamics of the Green Fluorescent Protein chromophore in solution

Author

Vengris, Mikas, van Stokkum, Ivo H.M., He, Xiang, Bell, Alasdair F., Tonge, Peter J., van Grondelle, Rienk, Larsen, Delmar S., Castleman, A. W., Jr., editor, Toennies, J.P., editor, Zinth, W., editor, Kobayashi, Takayoshi, editor, Okada, Tadashi, editor, Kobayashi, Tetsuro, editor, Nelson, Keith A., editor, and De Silvestri, Sandro, editor

Published
2005
Full Text
View/download PDF

47. Roadmap on bio-nano-photonics

Author

Herkert, Ediz, primary, Slesiona, Nicole, additional, Recchia, Martina Elisena, additional, Deckert, Thomas, additional, Garcia-Parajo, Maria F, additional, Fantuzzi, Eric Michele, additional, Pruccoli, Andrea, additional, Ragupathy, Imaiyan Chitra, additional, Gudavičius, Dominykas, additional, Rigneault, Hervé, additional, Majer, Jan, additional, Zumbusch, Andreas, additional, Munger, Eleanor, additional, Brasselet, Sophie, additional, Jones, Arwyn T, additional, Watson, Peter, additional, Boppart, Stephen A, additional, Singh, Vikramdeep, additional, Borkar, Saurabh, additional, Quintela Rodriguez, Frank E, additional, Langbein, Wolfgang, additional, Petropoulos, Vasilis, additional, van Hulst, Niek F, additional, Maiuri, Margherita, additional, Cerullo, Giulio, additional, Brida, Daniele, additional, Troiani, Filippo, additional, Rozzi, Carlo Andrea, additional, Molinari, Elisa, additional, Vengris, Mikas, additional, and Borri, Paola, additional

Published
2021
Full Text
View/download PDF

50. Nanostructured multilayer coatings for spatial filtering

Author

Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers, Grineviciute, Lina, Babayigit, Ceren, Gailevicius, Darius, Peckus, Martynas, Turduev, Mirbek, Tolenis, Tomas, Vengris, Mikas, Kurt, Hamza, Staliunas, Kestutis, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers, Grineviciute, Lina, Babayigit, Ceren, Gailevicius, Darius, Peckus, Martynas, Turduev, Mirbek, Tolenis, Tomas, Vengris, Mikas, Kurt, Hamza, and Staliunas, Kestutis

Abstract

Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used for intracavity spatial filtering. Such conventional filtering requires access to the far-field domain. In microlasers, however, conventional filtering is impossible due to the lack of space in microresonators to access the far-field. Therefore, a novel concept for more compact and efficient spatial filtering is necessary. In this study, a conceptually novel mechanism of spatial filtering in the near-field domain is proposed and demonstrated, by a nanostructured multilayer coating—a 2D photonic crystal structure with a periodic index modulation along the longitudinal and transverse directions to the beam propagation. The structure is built on a nanomodulated substrate, to provide the transverse periodicity. The physical vapor deposition is used to provide self-repeating modulation in the longitudinal direction. A 5 µm thick photonic multilayer structure composed of nanostructured multiple layers of alternating high- and low-index materials providing spatial filtering in the near-infrared frequencies with 2° low angle passband is experimentally demonstrated. The proposed photonic structure can be considered as an ideal component for intracavity spatial filtering in microlasers., Postprint (published version)

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results