E-Locus - Institutional Repository of the University of Crete

Home Collections Type of Work Post-graduate theses

Post-graduate theses

Search command : Author="Κοπιδάκης" And Author="Γεώργιος"

Current Record: 8 of 6610

[Add to Basket]

Identifier

000465803

Title

Study of polypropylene microcavities using whispering gallery mode resonation

Alternative Title

Μελέτη κοιλοτήτων πολυπροπυλενίου με χρήση τρόπων εγκλωβισμού ψιθυρισμού

Author

Γιούνη, Πολυξένη Α.

Thesis advisor

Πισσαδάκης, Σταύρος

Reviewer

Κομίνης, Ιωάννης
Αποστολόπουλος, Βασίλης

Abstract

Whispering gallery modes (WGMs) exhibit unique characteristics, involving high Q factor and sensitivity to refractive index changes. These parameters provide useful information about the material’s physical parameters, such as its dimensions, or its mechanical properties under the application of axial strain. The latter, reflects the basis of our experimental work, where light confinement within polypropylene cylindrical microresonators is extensively examined. The main purpose of our experiments is the investigation of WGM spectral behavior under the material’s mechanical deformation, in order to determine the photo – elastic properties of polypropylene. Whispering gallery mode resonances are studied for the first time in polypropylene cylindrically symmetric microcavities. Spectra for both TE and TM polarization states are obtained. Spectral shifts under applied strain are used for determining the strain optical coefficient of polypropylene. Light propagation and mode formation inside polypropylene resonators is also simulated, with the aid of proper computational programs, in order to estimate the modal eigenstates. These are characterized based on their modal indices and selected WGM spectral description. WGM resonance response under the application of mechanical deformation is extensively studied in this work, providing a non – destructive method for the determination of the material’s photo - elastic parameters. An insight of polypropylene’s photo – elastic properties is considered very important in the field of applied Photonics, yielding in the application of future photonic devices based on polypropylene’s characteristics.

Language

English

Subject

Birefringence

Photo-elasticity

Polypropylene

Resonance

Διπλοθλαστικότητα

Πολυπροπυλένιο

Συντονισμός

Φωτο-ελαστικότητα

Issue date