CMSP Seminar (Atomistic Simulation Seminar Series) 9 October, 14:00hrs, by D. Scherlis
CMSP Seminars Secretariat
OnlineCMSP at ictp.it
Tue Oct 1 12:01:57 CEST 2024
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CMSP Seminar (Atomistic Simulation Seminar Series)
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*Wednesday, 9 October 2024, 14:00 hrs*
*/Luigi Stasi Seminar Room (Leonardo Building, first floor)/*/
/
/Zoom registration link:
https://zoom.us/meeting/register/tJ0rc-6gqDktHdzMNdw1kL2929gjCztNrWdB<https://zoom.us/meeting/register/tJIqf-ihrzkqH9AgyozbVO89Im32vIxe3ubZ>
<https://zoom.us/meeting/register/tJ0rc-6gqDktHdzMNdw1kL2929gjCztNrWdB> /
Speaker:* Damian Scherlis * (University of Buenos Aires INQUIMAE - CONICET)
Title: *Modeling light emission from semiconducting polymers *
Abstract:
We will present two approaches to describe the electron dynamics in
molecules coupled to photon emission, derived respectively from
semiclassical and from quantum electrodynamics (QED) treatments.
Remarkably, one of the driving terms present in the QED equation of
motion exactly matches the driving term of the semiclassical
approximation. This coincidence highlights the missing piece in the
semiclassical scheme, portraying two regimes: (i) weakly excited
systems, where semiclassical dynamics dominate and emission power is
controlled by the coherences; and (ii) strongly excited systems or
eigenstates, where a full quantum treatment is mandatory to recover the
power, controlled by the populations. We will show applications of these
formalisms to model radiation in response to currents or laser pulses.
In particular we address with these methodologies the
electroluminescence of organic polymers (OLEDs), and collective optical
phenomena as superradiance and subradiance.
Refs:
[1] Phys. Rev. Lett. 126, 087401 (2021)
[2] J. Phys. Chem. Lett. 13, 11601 (2022)
[3] J. Chem. Phys. 160, 214102 (2024)
http://www.ictp.it/research/cmsp.aspx
The Abdus Salam International Centre for Theoretical Physics
https://www.ictp.it/
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