Select a date or location to show sessions only on that day or location.
Select a single session for a detailed view (with abstracts and downloads when you are logged in as a registered attendee).
Please note that all times are shown in the time zone of the conference. The current conference time is: 12th May 2024, 04:28:09am CEST
OMN S01: Opto-electronic Nanotechnologies and Microsystems I
Time:
Thursday, 14/Sept/2023:
3:30pm - 5:00pm
Session Chair: Emilija Petronijevic, Sapienza University of Rome, Italy Session Chair: Vito Mocella, CNR, Italy
Location:Musigny/Pommard/Volnay
Presentations
3:30pm - 4:00pm Invited ID: 372 / OMN S01: 1 Special Session on “Opto-electronic Nanotechnologies and Microsystems” (ONM)
Ultrafast control of conductivity with femtosecond lasers
Davide Boschetto
ENSTA Paris/Ecole Polytechnique/CNRS/Institut Polytechnique de Paris, France
Femtosecond laser pulse irradiation enables precise control of conductivity in materials, revolutioniz- ing fields like nanoelectronics and materials science. It offers rapid modulation within femtosecond timescales, facilitating advancements in ultrafast electronics and high-speed data processing. In this talk, we will focus on the photoinduced reduction of conductivity in incommensurate crystals through excitation of electrons into localized states, revealing potential applications in optoelectronics, ultrafast switches, and photonic devices.
4:00pm - 4:15pm ID: 268 / OMN S01: 2 Special Session on “Opto-electronic Nanotechnologies and Microsystems” (ONM)
Tuning mid-infrared polarization sensitive reflectivity in GaN/AlGaN heterostructures
Alessandro Bile1, Marco Centini1, Daniele Ceneda1, Adriana Passaseo2, David Maria Tobaldi2, Vittorianna Tasco2, Concita Sibilia1, Maria Cristina Larciprete1
1Department of Basic and Applied Sciences for Engineering, Sapienza Università di Roma, Via Scarpa 16, 00161, Rome, Italy.; 2CNR NANOTEC Institute of Nanotechnology, Via Monteroni, 73100, Lecce, Italy.
We present narrow-band polarization-sensitive reflectance of GaN/AlGaN heterostructures in the mid-infrared range. Experimental measurements performed at 15° angle of incidence show the excitation of a Berreman mode at the interface between GaN and sapphire substrate. A transfer matrix method for anisotropic layers has been used to analyze the obtained results. The contribution of the two-dimensional electron gas at the interfaces of the heterostructures has been included by proper modelization of an effective thin layer.
4:15pm - 4:30pm ID: 412 / OMN S01: 3 Special Session on “Opto-electronic Nanotechnologies and Microsystems” (ONM)
Bound states in the continuum: from enhanced biosensing to upconversion emission
Silvia Romano
ISASI-CNR, Italy
An overview of the applications of bound states in continuum (BICs) applications, from ultrasensitive sensing to giant enhancement of upconversion luminescence at Friedrich-Wintgen BIC, is reported. Perspective exploitation of this new class of devices is discussed.
4:30pm - 4:45pm ID: 276 / OMN S01: 4 Special Session on “Opto-electronic Nanotechnologies and Microsystems” (ONM)
Laser-induced periodic surface structures as optical resonators for organic thin-film distributed feedback lasers
Tiange Dong, Tobias Antrack, Jakob Lindenthal, Johannes Benduhn, Markas Sudzius, Karl Leo
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute of Applied Physics, TU Dresden, Germany
Laser-induced periodic surface structures (LIPSS) have received considerable attention due to their potential for micro- and nanostructuring and surface functionalization of various materials. We present a novel application of LIPSS on a glass substrate as distributed feedback (DFB) laser resonators, capable of providing sufficient positive optical feedback to achieve lasing in thin-film waveguides with organic small molecules as a gain medium. The direct femtosecond micromachining allows for easy variation of the periodicity across a broad range of values, including those required to reach 1st Bragg order DFB operation. We investigate several small molecule organic thin-film systems and observe lasing in strong accordance with the underlying periodicities of all photonic structures involved. These results demonstrate the effectiveness of LIPSS as DFB laser resonators and suggest that they could facilitate the integration of organic thin-film media-based lasers and other photonic devices into various integrated photonic systems.
4:45pm - 5:00pm ID: 384 / OMN S01: 5 Special Session on “Opto-electronic Nanotechnologies and Microsystems” (ONM)
Experimental determination of the thermal boundary resistance of carbon nanotubes in water: an ultrafast optical spectroscopy study
Margherita Vittucci1,2, Alessandro Casto1, Fabien Vialla1, Aurélien Crut1, Concita Sibilia2, Fabrice Vallée1, Natalia Del Fatti1, Francesco Banfi1, Paolo Maioli1
1FemtoNanoOptics group, Institut Lumière Matière, Université Lyon 1, CNRS, 69622, Villeurbanne; 2Dipartimento di Scienze di Base e Applicate per l’Ingegneria Sapienza Università di Roma, Via A. Scarpa 16, I-00161 Roma, Italy
Thermal boundary resistance at the interface between carbon nanotubes and water is experimentally investigated measuring the nanotube cooling dynamics via ultrafast optical spectroscopy. This far-field non-contact technique allows quantitative measurement of the thermal boundary resistance and characterization of its dependence on the CNT size, the surrounding liquid and the specifics of the interface.
