All day
Place: ICFO Auditorium
Georgia Papadakis (ICFO)
BIO:
Georgia studied Electrical and Computer Engineering at the National Technical University of Athens. In 2011, she moved to CERN in Geneva, Switzerland, where she worked on radio frequency particle accelerators. In 2012 she joined the California Institute of Technology from where she received her PhD in Applied Physics in 2018. Georgia’s PhD work investigated light-matter interactions in nanostructures and two-dimensional materials. She did her postdoctoral studies at Stanford University during 2018-2021, in the group of S. Fan. At Stanford, Georgia worked on radiative heat transfer for renewable energy applications. Georgia joined ICFO in July 2021 as a group leader, where she works on harnessing thermal radiation for heat-to-electricity energy conversion, lighting, and sensing. She is the recipient of the National Science Foundation Graduate Research Fellowship, the Marie Curie Postdoctoral Fellowship, the Tomkat Postdoctoral Fellowship on Sustainable Energy at Stanford University, the la Caixa postdoctoral research fellowship, and the 2023 Nanophotonics Journal Early Career award.
TALK: "Far-field thermal photonics with polaritonic materials"
The blackbody spectrum peaks within the mid-infrared (IR) spectral range for near-room temperatures. In the mid-IR range, most dielectric materials exhibit pronounced phonon polariton resonances. In this talk, I will discuss means of harnessing such resonances to control the bandwidth, directionality, and state of polarization of thermal emission and radiation. First, I will demonstrate that single flakes of low-dimensional materials such as a-MoO3 or V2O5 suffice to achieve mid-IR phase retardation, based on which we have built the thinnest reported phase retarders to date [1]. Harnessing the extreme anisotropy of such flakes can also yield pronounced chiral response in the mid-IR range, which we probe in thermal emission experiments. By leveraging the ultra-low-loss of phonon polaritons supported in low-dimensional materials, for instance in hexagonal boron nitride, I will demonstrate the possibility to induce antenna-like thermal emission lobes with extreme directionality, comparable to that of grating structures [2], but realizable without any lithography [3]. I will demonstrate experimental results of such pattern-free directional thermal emission from polar materials.
All day
Place: ICFO Auditorium
Georgia Papadakis (ICFO)
BIO:
Georgia studied Electrical and Computer Engineering at the National Technical University of Athens. In 2011, she moved to CERN in Geneva, Switzerland, where she worked on radio frequency particle accelerators. In 2012 she joined the California Institute of Technology from where she received her PhD in Applied Physics in 2018. Georgia’s PhD work investigated light-matter interactions in nanostructures and two-dimensional materials. She did her postdoctoral studies at Stanford University during 2018-2021, in the group of S. Fan. At Stanford, Georgia worked on radiative heat transfer for renewable energy applications. Georgia joined ICFO in July 2021 as a group leader, where she works on harnessing thermal radiation for heat-to-electricity energy conversion, lighting, and sensing. She is the recipient of the National Science Foundation Graduate Research Fellowship, the Marie Curie Postdoctoral Fellowship, the Tomkat Postdoctoral Fellowship on Sustainable Energy at Stanford University, the la Caixa postdoctoral research fellowship, and the 2023 Nanophotonics Journal Early Career award.
TALK: "Far-field thermal photonics with polaritonic materials"
The blackbody spectrum peaks within the mid-infrared (IR) spectral range for near-room temperatures. In the mid-IR range, most dielectric materials exhibit pronounced phonon polariton resonances. In this talk, I will discuss means of harnessing such resonances to control the bandwidth, directionality, and state of polarization of thermal emission and radiation. First, I will demonstrate that single flakes of low-dimensional materials such as a-MoO3 or V2O5 suffice to achieve mid-IR phase retardation, based on which we have built the thinnest reported phase retarders to date [1]. Harnessing the extreme anisotropy of such flakes can also yield pronounced chiral response in the mid-IR range, which we probe in thermal emission experiments. By leveraging the ultra-low-loss of phonon polaritons supported in low-dimensional materials, for instance in hexagonal boron nitride, I will demonstrate the possibility to induce antenna-like thermal emission lobes with extreme directionality, comparable to that of grating structures [2], but realizable without any lithography [3]. I will demonstrate experimental results of such pattern-free directional thermal emission from polar materials.