Zobrazeno 1 - 10
of 187
pro vyhledávání: '"Pawel Szczepanski"'
Publikováno v:
Materials, Vol 14, Iss 2865, p 2865 (2021)
Materials
Volume 14
Issue 11
Materials
Volume 14
Issue 11
Hereby, we present an optical isolator (optical diode) based on a hyperbolic metamaterial (HMM). We demonstrate that a grating-free planar linear non-magnetic HMM structure deposited on a high-index substrate, which, due to presence of strong spatial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5e4ca5697e9afcde3e8ea7913ec1f9d
https://www.mdpi.com/1996-1944/14/11/2865
https://www.mdpi.com/1996-1944/14/11/2865
Autor:
Pawel Szczepanski, Bartosz Janaszek
Publikováno v:
Metamaterials XIII.
Hereby, we present analysis of threshold generation in DFB laser based on isotropic medium with optical gain and hyperbolic metamaterial (HMM) forming together a periodic structure, namely photonic hypercrystal. We investigate possibility of controll
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9ad4963517f34b0c19ec038b204c3cb
https://doi.org/10.1117/12.2591850
https://doi.org/10.1117/12.2591850
Publikováno v:
Metamaterials XIII.
In this work, we further explore the possibility of inducing spatial dispersion in hyperbolic metamaterials to exploit new functionalities which cannot be predicted via local approximation. For this purpose, we employed a nonlocal effective medium ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3db392eec2df9c329eff365cfac74fae
https://doi.org/10.1117/12.2591851
https://doi.org/10.1117/12.2591851
Publikováno v:
Applied optics. 60(5)
In this study, an analysis of the second-harmonic generation (SHG) response from surfaces containing dielectric–semiconductor interfaces with sub-wavelength features is presented. The investigated medium is a metamaterial where the SHG response is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e889f741dfb0cf714e91c404ddcb8cf7
https://pubmed.ncbi.nlm.nih.gov/33690561
https://pubmed.ncbi.nlm.nih.gov/33690561
Publikováno v:
Optics express. 28(26)
In this work, we study intermodal coupling in a waveguiding system composed of a planar dielectric waveguide and a tunable hyperbolic metamaterial waveguide based on graphene, which has not been yet investigated in this class of waveguide system. For
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffb012c77c15aad21299147c6f1f679a
https://pubmed.ncbi.nlm.nih.gov/33379539
https://pubmed.ncbi.nlm.nih.gov/33379539
Publikováno v:
Crystals, Vol 10, Iss 3, p 176 (2020)
Crystals
Volume 10
Issue 3
Crystals
Volume 10
Issue 3
We have theoretically investigated metal-cladded waveguides of tunable hyperbolic metamaterial (THMM) cores, employing graphene sheets as a tunable layer, in terms of guided waves propagation over near- to mid-infrared range, following the effective
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f47a4dd65708f3d27cc8b7e22e87cc1
https://www.mdpi.com/2073-4352/10/3/176
https://www.mdpi.com/2073-4352/10/3/176
Publikováno v:
IEEE Journal of Quantum Electronics. 53:1-11
The analysis of a nonlinear gain and loss in multilayer PT -symmetric Bragg grating structure is presented. The simple model shows wave propagation through nonlinear multilayer grating in an optical way (without the need to use complex methods). A ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f57c8113b890efac0292587e3e75f3e
https://doi.org/10.1109/jqe.2017.2761380
https://doi.org/10.1109/jqe.2017.2761380
Autor:
Pawel Szczepanski, Bartosz Janaszek
Publikováno v:
Materials
Materials, Vol 14, Iss 4065, p 4065 (2021)
Volume 14
Issue 15
Materials, Vol 14, Iss 4065, p 4065 (2021)
Volume 14
Issue 15
In this work, we investigate the generation of light in a distributed feedback (DFB) laser composed of periodically arranged layers of hyperbolic medium and active material forming a 1D photonic hypercrystal (PHC). The scope of our study covers the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cb8ea497a39bbdd6109d03ba21ce699
https://doi.org/10.3390/ma14154065
https://doi.org/10.3390/ma14154065
Publikováno v:
Crystals
Volume 10
Issue 7
Crystals, Vol 10, Iss 577, p 577 (2020)
Volume 10
Issue 7
Crystals, Vol 10, Iss 577, p 577 (2020)
In this paper we investigate transmittance and reflectance spectra of multilayer hyperbolic metamaterials in the presence of strong spatial dispersion. Our analysis revealed a number of intriguing optical phenomena, which cannot be predicted with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c943348f124dec46c1a6ac596a8166d
https://doi.org/10.3390/cryst10070577
https://doi.org/10.3390/cryst10070577
Autor:
Pawel Szczepanski, Bartosz Janaszek
Publikováno v:
Optics Express. 28:15447
In this study, we investigate an effect of spatial dispersion in anisotropic metamaterials of regular periodic geometry. We indicate conditions under which a local and nonlocal approach are convergent, as well as the areas of particularly strong nonl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71ee8e4f9142d3291755da3d74314b12
https://doi.org/10.1364/oe.392596
https://doi.org/10.1364/oe.392596