Valeria Giliberti, "Sub-wavelength optical field enhancement and confinement: overcoming challenges from nanotechnology to biophysics", Dip. di Fisica
Seminario della vincitrice della procedura selettiva per RTT-GRUPPO SCIENTIFICO DISCIPLINARE 02/PHYS-03 – SETTORE SCIENTIFICO DISCIPLINARE PHYS-03/A-CODICE CONCORSO 2024RTTE022
Oratrice: Valeria Giliberti
Dipartimento di Fisica, Aula Rasetti edificio Marconi CU013 2°Piano
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Titolo:
Sub-wavelength optical field enhancement and confinement: overcoming challenges from nanotechnology to biophysics
To overcome the inherent limitations of optical spectroscopy imposed by the diffraction limit, while simultaneously enhancing sensitivity, various strategies can be employed to enhance the optical field and confine it within sub-wavelength volumes. Among these, plasmonics - intended as the resonant excitation of collective oscillations of free electrons - has proven to be the most effective approach for controlling and concentrating electromagnetic radiation at the nanoscale. Over the past decade, combining field enhancement and confinement strategies with scanning probe microscopy has driven groundbreaking advancements in optical spectroscopy and imaging across a wide electromagnetic spectrum, from the visible and mid-infrared to longer THz wavelengths.
In this seminar, I will present selected research activities where I have exploited and explored sub-wavelength field confinement and enhancement to address challenges across diverse fields. The activities range from the study of THz plasmons in two-dimensional electron gases devices to nanoscale mid-infrared spectroscopy of proteins using scanning probe techniques, including the design and nanofabrication of new probes optimized for mid-infrared.
