Experimental Physics / Nanophotonics (Menezes 5)

Department / Institute
Physics Department / Chair of Hybrid Nanosystems
Subject area
Experimental Physics / Nanophotonics
Name of supervisor
Prof. Dr. Leonardo de Souza Menezes
Number of open positions
Project title
Polymeric integrated optics
Language requirements
Fluency in English
Academic requirements
4-year Bachelor's plus Master's degree; good knowledge in advanced electromagnetic theory and strong knowledge in optical characterization techniques. Skills with computational simulations are highly desirable.
Study model
Full doctoral study model: 48 months

Project description

Although the use of polymeric platforms in integrated (on-chip) photonic devices is extremely interesting, it is still seldom reported. In fact, there are only a few studies in this direction on structures fabricated by two-photon polymerization, which contrasts to the number of similar studies in semiconductor structures. In this project one aims at fabricating polymeric devices via two-photon polymerization for integrated optics, mainly using the Nanoscribe facility full accessible to the host group. Not only linear optical processes will be exploited, but also nonlinear ones, nevertheless using moderate input/excitation power levels. This is possible due to the high confinement degree of the electromagnetic field and long interaction lengths in the fabricated micro- and nanostructures, as the cases of waveguides and microresonators. Particularly interesting are polymeric whispering-gallery-mode (WGM) resonators coupled to polymeric nanofibers, system in which one can also incorporate fluorofores, like dye molecules or color centers in dielectric nanocrystals, aiming at, among other goals, obtaining micro- and nanolasing. The properties of the WGMs, like their ultrahigh resonance quality factors (ultranarrow resonances) and high spatial mode confinement, combined with the mode selectivity, make WGM resonators ideal for developing platforms for cavity quantum electrodynamics and nonlinear optical studies, as well as integration with 2D materials and applications in telecommunications - as optical filters, or in single molecule biosensing.

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