Schools
From July 1, 2024 to July 3, 2024
All day
Place: ICFO Auditorium
Frank Koppens (ICFO)
BIO:
Prof. Frank Koppens is group leader at the Institute of Photonic Sciences (ICFO). The Quantum Nano-Optoelectronics Group, led by Prof. Koppens, is at the forefront of researching the fundamental science and potential applications of heterostructures of stacked and twisted two-dimensional (2D) materials. In particular, the group focuses on the interactions with light at extreme limits and at the nanoscale. The group integrates the realms of nanophotonics, 2D materials, topology, emerging phenomena, and strong light-matter interactions, creating a multidisciplinary approach in their research. Koppens is co-founder of the company Qurv, which commercializes images sensors for machine vision.
Prof. Koppens is vice-chairman of the executive board of the graphene flagship program and leader of the optoelectronics workpackage within the flagship. Koppens has received the ERC starting grant, the ERC consolidator grant, and five ERC proof-of-concept grants. Other awards include the Christiaan Hugyensprijs 2012, the national award for research in Spain, the IUPAP young scientist prize in optics, and the ACS photonics investigator award. Since 2018 Koppens is on the Clarivate list for highly cited researchers, in the physics category, and in 20220 he has been elected as fellow of the American Physical Society.
Weblinks:
TALK: "Nanocavities, nano-imaging, and opto-electronics in twisted and stacked 2D materials"
Two-dimensional (2D) materials have extraordinary potential to control light and light-matter interactions on an atomic scale. Recently, twisted 2D materials have drawn considerable attention due to their capability of inducing moiré superlattices and the discovery electronic correlated phases. Various nanoscale optoelectronic probing scheme, utilizing infrared and terahertz radiation, are presented, revealing the materials topology, photoconversion and interaction effects. Furthermore, by probing modulated 2D materials on the nanoscale, record-small nanoscale polaritonic cavities are revealed, as well as the formation of nanoscale hypercrystals, exhibiting negative refraction and topological interface states.
TUTORIAL: "Quantum geometry of 2D materials: from anomalous photoresponse to bulk photovoltaics"
Quantum geometry of two-dimensional (2D) materials has emerged as a pivotal area in solid-state physics, influencing a wide range of phenomena from anomalous photoresponses to bulk photovoltaic effects. This tutorial addresses the intricate interplay between quantum geometry and the electronic properties of 2D materials, with a focus on the manifestation of these effects in practical applications. A tangible example is the bulk photovoltaic effect (BPVE), a process where a material generates a direct current under uniform illumination without the need for a p-n junction, as seen in traditional photovoltaic devices.
A special emphasis is placed on twisted bilayer graphene (TBG), a material that has garnered significant attention due to its highly tunable electronic structure and the emergence of flat bands at specific twist angles. In TBG, the interplay between moiré superlattice potentials and quantum geometric properties enhances the BPVE, making it a promising candidate for novel photovoltaic applications. We provide a comprehensive overview of how quantum geometry governs the optoelectronic responses in 2D materials, paving the way for innovative technological advancements in the field of photovoltaics.
Schools
From July 1, 2024 to July 3, 2024
All day
Place: ICFO Auditorium
Frank Koppens (ICFO)
BIO:
Prof. Frank Koppens is group leader at the Institute of Photonic Sciences (ICFO). The Quantum Nano-Optoelectronics Group, led by Prof. Koppens, is at the forefront of researching the fundamental science and potential applications of heterostructures of stacked and twisted two-dimensional (2D) materials. In particular, the group focuses on the interactions with light at extreme limits and at the nanoscale. The group integrates the realms of nanophotonics, 2D materials, topology, emerging phenomena, and strong light-matter interactions, creating a multidisciplinary approach in their research. Koppens is co-founder of the company Qurv, which commercializes images sensors for machine vision.
Prof. Koppens is vice-chairman of the executive board of the graphene flagship program and leader of the optoelectronics workpackage within the flagship. Koppens has received the ERC starting grant, the ERC consolidator grant, and five ERC proof-of-concept grants. Other awards include the Christiaan Hugyensprijs 2012, the national award for research in Spain, the IUPAP young scientist prize in optics, and the ACS photonics investigator award. Since 2018 Koppens is on the Clarivate list for highly cited researchers, in the physics category, and in 20220 he has been elected as fellow of the American Physical Society.
Weblinks:
TALK: "Nanocavities, nano-imaging, and opto-electronics in twisted and stacked 2D materials"
Two-dimensional (2D) materials have extraordinary potential to control light and light-matter interactions on an atomic scale. Recently, twisted 2D materials have drawn considerable attention due to their capability of inducing moiré superlattices and the discovery electronic correlated phases. Various nanoscale optoelectronic probing scheme, utilizing infrared and terahertz radiation, are presented, revealing the materials topology, photoconversion and interaction effects. Furthermore, by probing modulated 2D materials on the nanoscale, record-small nanoscale polaritonic cavities are revealed, as well as the formation of nanoscale hypercrystals, exhibiting negative refraction and topological interface states.
TUTORIAL: "Quantum geometry of 2D materials: from anomalous photoresponse to bulk photovoltaics"
Quantum geometry of two-dimensional (2D) materials has emerged as a pivotal area in solid-state physics, influencing a wide range of phenomena from anomalous photoresponses to bulk photovoltaic effects. This tutorial addresses the intricate interplay between quantum geometry and the electronic properties of 2D materials, with a focus on the manifestation of these effects in practical applications. A tangible example is the bulk photovoltaic effect (BPVE), a process where a material generates a direct current under uniform illumination without the need for a p-n junction, as seen in traditional photovoltaic devices.
A special emphasis is placed on twisted bilayer graphene (TBG), a material that has garnered significant attention due to its highly tunable electronic structure and the emergence of flat bands at specific twist angles. In TBG, the interplay between moiré superlattice potentials and quantum geometric properties enhances the BPVE, making it a promising candidate for novel photovoltaic applications. We provide a comprehensive overview of how quantum geometry governs the optoelectronic responses in 2D materials, paving the way for innovative technological advancements in the field of photovoltaics.