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of 94
pro vyhledávání: '"Zidek Karel"'
Optical coating, an integral part of many optical systems, is prone to damage from environmental exposure and laser irradiation. This underscores the need for reliable and sensitive coating diagnostics. We introduce second harmonic generation (SHG) a
Externí odkaz:
http://arxiv.org/abs/2412.08181
Autor:
Guesmi Mariem, Thor Tomas, Taboubi Oumayma, Šeděnková Ivana, Panthi Yadu Ram, Pfleger Jiri, Zidek Karel
Publikováno v:
EPJ Web of Conferences, Vol 287, p 05025 (2023)
Analysis of defects in optical materials is essential for their applicability in cutting-edge optical components. Since fused silica (FS) counts among the most used materials, deep knowledge about the defects in FS is of high importance. These defect
Externí odkaz:
https://doaj.org/article/aae93a6f622a4aa5b6ce3177ef0310f9
Autor:
Miller, Vojtech, Zidek, Karel
The figure of merit (FoM) of Ti:Sapphire (Ti:Sa) crystals is a generally used means to evaluate the quality of the crystals. Despite the importance of Ti:Sa, the question of FoM measurement precision stayed out of focus, while the commercially availa
Externí odkaz:
http://arxiv.org/abs/2301.02922
Strong second harmonic generation (SHG) in silicon nitride has been extensively studied-among others, in terms of laser-induced SHG enhancement in Si3N4 waveguides. This enhancement has been ascribed to the all-optical poling induced by the coherent
Externí odkaz:
http://arxiv.org/abs/2212.09411
Autor:
Junek, Jiri, Zidek, Karel
RAndom Temporal Signals (RATS) method has proven to be a useful and versatile method for measuring photoluminescence (PL) dynamics and fluorescence lifetime imaging (FLIM). Here, we present two fundamental development steps in the method. First, we d
Externí odkaz:
http://arxiv.org/abs/2208.13640
Coded aperture snapshot spectral imaging (CASSI) makes it possible to recover 3D hyperspectral data from a single 2D image. However, the reconstruction problem is severely underdetermined and efforts to improve the compression ratio typically make th
Externí odkaz:
http://arxiv.org/abs/2208.01308
We propose a novel concept of differential coded aperture snapshot spectral imaging (D-CASSI) technique exploiting the benefits of using {-1,+1} random mask, which is demonstrated by a broadband single-snapshot hyperspectral camera using compressed s
Externí odkaz:
http://arxiv.org/abs/2208.01309
Autor:
Wang, Zhengjun, Hedse, Albin, Amarotti, Edoardo, Lenngren, Nils, Zidek, Karel, Zheng, Kaibo, Zigmantas, Donatas, Pullerits, Tonu
Advances in ultrafast spectroscopy can provide access to dynamics involving nontrivial quantum correlations and their evolutions. In coherent 2D spectroscopy, the oscillatory time dependence of a signal is a signature of such quantum dynamics. Here w
Externí odkaz:
http://arxiv.org/abs/2205.06999
Autor:
Guesmi, Mariem, Thoř, Tomáš, Procháska, František, Hlubučková, Martina, Kanclíř, Vít, Taboubi, Oumayma, Šeděnková, Ivana, Žídek, Karel
Publikováno v:
In Journal of Luminescence March 2025 278
Autor:
Junek, Jiri, Zidek, Karel
Using a random temporal signal for sample excitation (RATS method) is a new, efficient approach to measuring photoluminescence (PL) dynamics. The method can be used in single-point measurement (0D), but also it can be converted to PL decay imaging (2
Externí odkaz:
http://arxiv.org/abs/2112.02599