Doctoral theses
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Identifier |
000466966 |
Title |
Angularly accelerating optical beams |
Alternative Title |
Γωνιακά επιταχυνόμενες οπτικές δέσμες |
Author
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Μπρίμης, Απόστολος Ι
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Thesis advisor
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Μακρής, Κωνσταντίνος
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Reviewer
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Παπάζογλου, Δηµήτρης
Ρακιτζής, Θεόδωρος-Πέτρος
Αποστολόπουλος, Βασίλειος
Wolf von Klitzing
Τζωρτζάκης, Στέλιος
Καφεσάκη, Μαρία
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Abstract |
Structured light has recently emerged as a topic of wide interest in optics. In its
more general description Structured Light refers to the controlled modulation of
an optical light beam in order to engineer its properties along propagation. By
modulating the phase, the amplitude, and the polarization of a light we can
control the intensity, phase and polarization distribution along propagation.
This thesis is focused on the theoretical study of light beams that twist as they
propagate. By introducing novel design approaches we have introduced a new
family of structured light, referred to as Tornado Waves (ToWs), that abruptly
autofocus while twisting in an accelerating fashion.
Using numerical simulations, we have demonstrated that light structures with
features that twist and shrink with trajectories resembling the shape of a Tornado
can be generated by beams that carry orbital angular momentum (OAM). Our
findings show that Tornado waves can exhibit angular acceleration, a measure of
how the pitch of the spiraling structure varies along propagation, that is orders of
magnitude higher compared to the bibliography. Likewise, we have revealed the
interplay between phase singularities and intensity features that synchronously
twist in Tornado waves.
Finally, we have extended our study to structured polarized light and more
specifically to Poincaré beams that exhibit interwinding polarization singularities
and chiral polarized domains.
Our results offer new directions of research in areas related to the spiraling
behavior of light such as optical tweezers, singular optics, direct laser writing,
non-linear wave mixing, harmonic generation, wavefront shaping, and
polarization engineering.
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Language |
English |
Subject |
OAM of light |
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Polarization of light |
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Structured light |
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Δομημένο φως |
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Επιταχυνόμενα οπτικές δέσμες |
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Πόλωση του φωτός |
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Στροφορμή του φωτός |
Issue date |
2024-09-09 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
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Type of Work--Doctoral theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/c/0/8/metadata-dlib-1724746442-551527-20581.tkl
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Views |
883 |
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