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[Fizinfo] Ortvay kollokvium/Ortvay colloquium, 04.05.2023

From: Kormányos Andor <andor.kormanyos AT ttk.elte.hu>
To: "fizinfo AT lists.kfki.hu" <fizinfo AT lists.kfki.hu>, "ttk-fiz-faculty AT listbox.elte.hu" <ttk-fiz-faculty AT listbox.elte.hu>, "ttk-fiz-kutato AT listbox.elte.hu" <ttk-fiz-kutato AT listbox.elte.hu>, "ttk-fiz-emeritus AT listbox.elte.hu" <ttk-fiz-emeritus AT listbox.elte.hu>, "ttk-fiz-postdoc AT listbox.elte.hu" <ttk-fiz-postdoc AT listbox.elte.hu>, "ttk-fiz-phd-hallgatok AT listbox.elte.hu" <ttk-fiz-phd-hallgatok AT listbox.elte.hu>, "ttk-fiz-alkalmazottak AT listbox.elte.hu" <ttk-fiz-alkalmazottak AT listbox.elte.hu>
Subject: [Fizinfo] Ortvay kollokvium/Ortvay colloquium, 04.05.2023
Date: Tue, 2 May 2023 10:30:03 +0000
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ELTE TTK Fizikai Intézet / ELTE Institute of Physics

ORTVAY KOLLOKVIUM / ORTVAY COLLOQUIUM
(https://physics.elte.hu/ortvayseminar)

Thursday, 4th May 2023, 15:00h.

Pócza Jenő Classroom, Physics Building 1.71

Pázmány Péter sétány 1/A, 1117 Budapest.

Levente Tapasztó

Institute of Technical Physics and Material Science

Strongly increased light-matter interaction mediated by graphene

Light and matter can interact in various ways. An intriguing type of
light-matter interaction occurs when incoming light induces a collective
oscillation of the electron system, giving rise to a new type of
quasi-particles, named plasmons. Only specific, so-called plasmonically
active materials allow such type of light-matter interaction. Graphene is a
single atom thick crystal consisting of a honeycomb lattice of carbon atoms,
characterized by a unique electronic structure. It is an intriguing question,
whether light can couple to such a unique electron system, and if so, what
the properties of the resulting graphene plasmons will be? We have developed
a novel nanoengineering technique to render graphene plasmonically active in
the visible-frequency range. The strong local fields of graphene plasmons,
extending only a couple of tens of nanometres outwards from the surface of
graphene, can increase the interaction of nearby molecules with light, by
several orders of magnitude. We have exploited the particularly strong
electric near-fields of visible frequency graphene plasmons to enable a much
more sensitive optical detection of specific molecules.

The seminar can also be followed via Microsoft Teams:

https://teams.microsoft.com/l/meetup-join/19%3ab082a694c8dc47a28a776c91a5432cf9%40thread.tacv2/1682777328753?context=%7b%22Tid%22%3a%22b366dbcd-4fc3-4451-82d2-e239564302c3%22%2c%22Oid%22%3a%22560bcc66-85b7-4700-9055-41903a3659ca%22%7d

Please make sure that you switch off your webcam before joining the meeting!

Andor Kormányos
coordinator

[Fizinfo] Ortvay kollokvium/Ortvay colloquium, 04.05.2023, Kormányos Andor, 05/02/2023