Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Chandroth P. Jisha"'
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043162 (2022)
We discuss the semiclassical transverse trapping of waves by means of an inhomogeneous gauge field. In the proposed scheme a temporally periodic perturbation is shifted in time, the imparted delay being dependent on the transverse direction. We show
Externí odkaz:
https://doaj.org/article/d8b7f4b0423b4159b3ba86104db4ec3a
Publikováno v:
Physical Review X, Vol 9, Iss 2, p 021051 (2019)
Since its introduction by Berry in 1984, the geometric phase has become of fundamental importance in physics, with applications ranging from solid-state physics to optics. In optics, the Pancharatnam-Berry phase allows the tailoring of optical beams
Externí odkaz:
https://doaj.org/article/128fcc4a774f46fd86d2079a49fbefcc
A waveguide based upon the Pancharatnam-Berry phase (PBP) confines light even in the absence of a refractive index gradient. Here, we investigate theoretically the properties and the robustness of the PBP waveguide.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e89ab7f87bb382cbb0bcca1d1ff374b3
Autor:
Chandroth P. Jisha, Stree Vithya Arumugam, Lorenzo Marrucci, Stefan Nolte, Alessandro Alberucci
We theoretically and numerically investigate the properties of waveguides based on the Pancharatnam-Berry phase, obtained by a longitudinally periodic rotation of the optic axis in a transversely-twisted birefringent medium. In this paper we study th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16b2e56b81bfa1f2c286a30f190c0035
http://arxiv.org/abs/2209.01918
http://arxiv.org/abs/2209.01918
Autor:
Stefan Nolte, Namig Alasgarzade, Alessandro Alberucci, Markus Blothe, Chandroth P. Jisha, Gabor Matthäus, Maxime Chambonneau
Publikováno v:
Optica Advanced Photonics Congress 2022.
We report on the inscription of waveguides in the bulk of crystalline silicon using infrared ultrashort laser pulses. The waveguides are characterized with respect to their structure, refractive index profile and guiding properties in detail.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a82e17ab0416d6454fd78c64276c5b6d
https://doi.org/10.1364/bgppm.2022.bw2a.1
https://doi.org/10.1364/bgppm.2022.bw2a.1
Photons are neutral particles, thus they are not affected by magnetic fields. Nonetheless, light propagation under the action of an effective magnetic field has been demonstrated [1] , [2] . This counter-intuitive result can be grasped by thinking in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::908a59c85bc9fd9e20e9d005e091feb7
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
As stated by Fermat’s principle, light propagation is dictated by the phase of the field. The phase is in turn dependent on the refractive index and its gradient in isotropic media; such a phase is called dynamic. In the presence of more complicate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e52c4f4df26f08f4f31fb8d80b918b7
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542216
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542216
Autor:
Markus Blothe, Stefan Nolte, Namig Alasgarzade, Alessandro Alberucci, Chandroth P. Jisha, Maxime Chambonneau
Publikováno v:
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Due to their large intensities, ultrashort pulses are capable of inducing permanent modifications well inside transparent materials when tightly focused. One of the main applications of this technique is the realization of 3D waveguides, fabricated b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ab100c0ff66391bbe96d1f2289fe0c3
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542782
https://doi.org/10.1109/cleo/europe-eqec52157.2021.9542782
Autor:
Alessandro Alberucci, Chandroth P. Jisha, Gabor Matthäus, Helena Kämmer, Stefan Nolte, Namig Alasgarzade, Maxime Chambonneau, Markus Blothe
Publikováno v:
Physical Review Applied. 14
We analyze the properties of femtosecond-laser-written waveguides in silicon. By using a mix of semianalytical and numerical methods, we find that the transverse index profile is accurately modeled by a W-shaped function supporting nonleaky guided mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99878e3cfa7a7f1c833ff31942ff675e
https://doi.org/10.1103/physrevapplied.14.024078
https://doi.org/10.1103/physrevapplied.14.024078
Publikováno v:
Laser & Photonics Reviews. 15:2100003
Geometric phase is a unifying and central concept in physics, including optics. As a matter of fact, optics played a pivotal role from the inception of this new paradigm, as some of the first experimental demonstrations have been carried out in optic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c2c4d23396287152f923fd53d65027a
https://doi.org/10.1002/lpor.202100003
https://doi.org/10.1002/lpor.202100003