TOM 1 - Silicon Photonics and Guided-Wave Optics
TOM 2 - Computational, Adaptive and Freeform Optics
TOM 3 - Optical System Design, Tolerancing and Manufacturing
TOM 4 - Bio-Medical Optics
TOM 5 - Resonant Nanophotonics
TOM 6 - Optical Materials: crystals, thin films, organic molecules & polymers, syntheses, characterization and applications
TOM 7 - Thermal radiation and energy management
TOM 8 - Non-linear and Quantum Optics
TOM 9 - Opto-electronic Nanotechnologies and Complex Systems
TOM 10 - Frontiers in Optical Metrology
TOM 11 - Tapered optical fibers, from fundamental to applications
TOM 12 - Optofluidics
TOM 13 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session
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Please note that all times are shown in the time zone of the conference. The current conference time is: 3rd Oct 2022, 04:24:57pm WEST
TOM9 S02: Opto-electronic Nanotechnologies and Complex Systems: Ligth Matter inetraction
2:30pm - 4:00pm
Session Chair: Emilija Petronijevic, Sapienza University of Rome, Italy
2nd floor, 70 seats
2:30pm - 3:00pm Invited ID: 343 / TOM9 S02: 1 TOM 9 Opto-electronic Nanotechnologies and Complex Systems
Light emission from color centers in phosphorus-doped diamond
Florian Sledz1, Assegid M. Flatae1, Stefano Lagomarsino1,2, Savino Piccolomo3, Shannon S. Nickley4,5, Ken Haenen4, Robert Rechenberg6, Michael F. Becker6, Silvio Sciortino2,7, Nicla Gelli2, Lorenzo Giuntini2,7, Giorgio Speranza3, Mario Agio1,8
1University of Siegen, Laboratory of Nano-Optics, 57072 Siegen, Germany; 2Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, 50019 Sesto Fiorentino, Italy; 3Fondazione Bruno Kessler, Centro Materiali e Microsistemi, 38122 Trento, Italy; 4Hasselt University & IMEC, Institute for Material Research (IMO) & IMOMEC, 3590 Diepenbeek, Belgium; 5University of Oxford, Department of Materials, Oxford OX1 2PH, United Kingdom; 6Fraunhofer USA, Center for Coatings and Diamond Technologies, East Lansing, MI 48824, USA; 7University of Florence, Departimento di Fisica e Astronomia, 50019 Sesto Fiorentino, Italy; 8National Research Council (CNR), National Institute of Optics (INO), 50125 Florence, Italy
Light emission from color centers in diamond is being extensively investigated for developing, among other quantum devices, single-photon sources operating at room temperature. By doping diamond with phosphorus, one obtains an n-type semiconductor, which can be exploited for the electrical excitation of color centers. Here, we discuss the optical properties of color centers in phosphorus-doped diamond, especially the silicon-vacancy center, presenting the single-photon emission characteristics and the temperature dependence aiming for electroluminescent single-photon emitting devices.
3:00pm - 3:15pm ID: 316 / TOM9 S02: 2 TOM 9 Opto-electronic Nanotechnologies and Complex Systems
Tunable photoconductive devices based on graphene/WSe2 heterostructures
Hongyu Tang, Giulia Tagliabue
Laboratory of Nanoscience for Energy Technologies (LNET),EPFL, Switzerland
Optoelectronic tunability in van der Waals heterostructures is essential for their optoelectronic applications. In this work, tunable photoconductive properties were investigated in the heterostructures of WSe2 and monolayer graphene with different stacking orders on SiO2/Si substrates. Here, we demonstrated the effect of the material thickness of WSe2 and graphene on the interfacial charge transport, light absorption, and photoresponses. The results showed that the WSe2/graphene heterostructure exhibited positive photoconductivity after photoexcitation, while negative photoconductivity was observed in the graphene/WSe2 heterostructures. The tunable photoconductive behaviors provide promising potential applications of van der Waals heterostructures in optoelectronics. This work has guiding significance for the realization of stacking engineering in van der Waals heterostructures.
3:15pm - 3:30pm ID: 297 / TOM9 S02: 3 TOM 9 Opto-electronic Nanotechnologies and Complex Systems
Field-enhancing tapered planarized waveguides for THz quantum cascade laser frequency combs
Urban Senica1, Andres Forrer1, Tudor Olariu1, Paolo Micheletti1, Sara Cibella2, Guido Torrioli2, Mattias Beck1, Jérôme Faist1, Giacomo Scalari1
1Quantum Optoelectronics Group, Institute of Quantum Electronics, ETH Zürich, Switzerland; 2Istituto di Fotonica e Nanotecnologie, CNR, Rome, Italy
We present a new planarized waveguide geometry for THz quantum cascade laser frequency combs with improved waveguide losses, RF and thermal dissipation properties. Ridge devices display broadband free-running comb states, and the THz emission can be further broadened by RF injection. Tapered waveguide devices feature a strong field-enhancement effect, which results in an improved comb performance. This includes free-running comb states with strong single beatnotes up to nearly -30 dBm at 90 K, almost three orders of magnitude stronger than for ridge devices. Improved comb operation is maintained also for high operating temperatures, up to 115 K.
3:30pm - 4:00pm Invited ID: 356 / TOM9 S02: 4 TOM 9 Opto-electronic Nanotechnologies and Complex Systems
Photonic metasurfaces for optical manipulation applications
Andrea Di Falco, Tomasz Plaskocinski
University of St Andrews, United Kingdom
Metasurfaces are versatile tools for controlling the behaviour of light through the exact control of light scattering at an interface. Here, we adopt the metasurface technology for optical manipulation applications, using their form factor and light-momentum engineering ability to enable new form of light-matter interactions. The resulting lab-on-chip platform offers unique advantages for biophotonic applications, including single molecule force spectroscopy and biological imaging.