Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Tzortzakis, Stelios"'
Autor:
Droulias, Sotiris, Loulakis, Michalis, Papazoglou, Dimitris G., Tzortzakis, Stelios, Chen, Zhigang, Efremidis, Nikolaos K.
We recently introduced a new class of optical beams with a Bessel-like transverse profile and increasing beam width during propagation, akin to an "inverted pin". Owing to their specially engineered distribution, these beams have shown remarkable per
Externí odkaz:
http://arxiv.org/abs/2408.02659
Autor:
Papamakarios, Savvas, Tsilipakos, Odysseas, Katsantonis, Ioannis, Koulouklidis, Anastasios D., Manousidaki, Maria, Zyla, Gordon, Daskalaki, Christina, Tzortzakis, Stelios, Kafesaki, Maria, Farsari, Maria
THz metamaterials present unique opportunities for next generation technologies and applications, as they can fill the ``THz gap'' originating from the weak response of natural materials in this regime, providing a variety of novel or advanced electr
Externí odkaz:
http://arxiv.org/abs/2406.04862
Autor:
Droulias, Sotiris, Loulakis, Michalis, Papazoglou, Dimitris G., Tzortzakis, Stelios, Chen, Zhigang, Efremidis, Nikolaos K.
We introduce a new class of optical beams, which feature a spatial profile akin to an ``inverted pin''. In particular, we asymptotically find that close to the axis the transverse amplitude profile of such beams takes the form of a Bessel function wi
Externí odkaz:
http://arxiv.org/abs/2310.01543
Autor:
Perrakis, George, Tasolamprou, Anna C., Kakavelakis, George, Petridis, Konstantinos, Graetzel, Michael, Kenanakis, George, Tzortzakis, Stelios, Kafesaki, Maria
Perovskite solar cells (PSCs) are the most promising technology for advancing current photovoltaic performance. However, the main challenge for their practical deployment and commercialization is their operational stability, affected by solar illumin
Externí odkaz:
http://arxiv.org/abs/2308.03386
Autor:
Katsantonis, Ioannis, Manousidaki, Maria, Koulouklidis, Anastasios D., Daskalaki, Christina, Spanos, Ioannis, Kerantzopoulos, Constantinos, Tasolamprou, Anna C., Soukoulis, Costas M., Economou, Eleftherios N., Tzortzakis, Stelios, Farsari, Maria, Kafesaki, Maria
Optical activity (polarization rotation of light) is one of the most desired features of chiral media, as it is important for many polarization related applications. However, in the THz region, chiral media with strong optical activity are not availa
Externí odkaz:
http://arxiv.org/abs/2302.08407
Autor:
Perrakis, George, Tasolamprou, Anna C., Kenanakis, George, Economou, Eleftherios N., Tzortzakis, Stelios, Kafesaki, Maria
We investigate and evaluate the contribution of the ultraviolet radiation spectrum on the temperature and efficiency of commercial crystalline silicon-based photovoltaics (PVs) that operate outdoors. The investigation is performed by employing a comp
Externí odkaz:
http://arxiv.org/abs/2003.06277
Autor:
Perrakis, George, Tasolamprou, Anna C., Kenanakis, George, Economou, Eleftherios N., Tzortzakis, Stelios, Kafesaki, Maria
The radiative cooling of objects during daytime under direct sunlight has recently been shown to be significantly enhanced by utilizing nanophotonic coatings. Multilayer thin film stacks, 2D photonic crystals, etc. as coating structures improved the
Externí odkaz:
http://arxiv.org/abs/1912.12154
Autor:
Tasolamprou, Anna C., Koulouklidis, Anastasios D., Daskalaki, Christina, Mavidis, Charalampos P., Kenanakis, George, Deligeorgis, George, Viskadourakis, Zacharias, Kuzhir, Polina, Tzortzakis, Stelios, Economou, Eleftherios N., Kafesaki, Maria, Soukoulis, Costas M.
We present the experimental and theoretical study of an ultrafast graphene based thin film absorption modulator for operation in the THz regime. The flat modulator is composed of a graphene sheet placed on a dielectric layer backed by a metallic back
Externí odkaz:
http://arxiv.org/abs/1908.06696
Autor:
Koulouklidis, Anastasios D., Papazoglou, Dimitris G., Fedorov, Vladimir Yu., Tzortzakis, Stelios
Publikováno v:
Physical Review Letters, 119, 223901 (2017)
We demonstrate both theoretically and experimentally that the harmonics from abruptly auto-focusing ring-Airy beams present a surprising property, they preserve the phase distribution of the fundamental beam. Consequently, this "phase memory" inherit
Externí odkaz:
http://arxiv.org/abs/1902.07991
Autor:
Syngelakis, Ioannis, Manousidaki, Maria, Kabouraki, Elmina, Kyriakakis, Apostolos, Kenanakis, George, Klini, Argyro, Tzortzakis, Stelios, Farsari, Maria
Publikováno v:
Journal of Applied Physics; 12/21/2023, Vol. 134 Issue 23, p1-9, 9p
