Zeit, Ort:

09:30 Uhr, Central seminar room, library building

Redner:

Dr. Pankaj Seliya; Excited atoms&molecules in strong fields

Titel:

Probing Electronic-Vibrational Coupling with Mid-IR - XUV Spectroscopy

Zeit, Ort:

09:00 Uhr, Central Seminar Room

Redner:

Mirela Petrova

In international research institutions, people from diverse cultural, linguistic, and social backgrounds work together. This diversity is a great strength for scientific creativity and innovation. At the same time, differences in communication styles, unconscious assumptions (bias), and unequal power dynamics can sometimes create challenges in collaboration.This workshop creates a reflective and respectful space in which participants can explore how perceptions, stereotypes, and communication patterns influence teamwork . The aim is to strengthen mutual understanding, encourage perspective-taking, and develop practical strategies for respectful and inclusive collaboration.

Zeit, Ort:

11:15 Uhr, Seminar Room 242, Bothe Lab

Redner:

Dr. André Gontijo Campos, MPIK

Titel:

Relativistic Lindblad description of the electron's radiative dynamics

Zeit, Ort:

11:15 Uhr, Grosser Hoersaal/Big Lecture Hall (library)

Redner:

Helmut Ritsch

Titel:

Engineering nonlinear collective optical dynamics in nano-arrays of quantum emitters

An array of closely spaced dipole coupled quantum emitters exhibits collective energy shifts as well as super- and sub-radiance with characteristic tailorable spatial radiation patterns. We identify a sub-wavelength sized ring of exactly 9 identical dipoles with an identical absorbing atom at the center as the most efficient configuration to deposit incoming photon energy to the center. For very tight dimension below a tenth of a wavelength, a full quantum master equation description exhibits a larger enhancement than predicted from a classical coupled dipole model. Adding gain to such systems allows to design minimalistic light sources with tailorable properties. Examples are mirrorless lasers, non-classical light sources for single or entangled pair photon generation. Such ring-shaped structures could be the basis of a new generation of highly efficient and selective nano antennas for single photon detectors of from microwaves to optical their unexpected properties could lead to understanding the efficiency of natural light harvesting molecules.More complex structures of dipole rings are also predicted for robust and low loss long range transport with advantageous properties in several respects.[1] R Holzinger, JS Peter, S Ostermann, H Ritsch, S Yelin, Harnessing quantum emitter rings for efficient energy transport and trapping, Optica Quantum 2 (2)[2] Holzinger, R, Moreno-Cardoner M, and H.R., Nanoscale continuous quantum light sources based on driven dipole emitter arrays, Appl. Phys. Lett. 2021[3] M Fasser, L Ostermann, H Ritsch, C Hotter, Subradiance and superradiant long-range excitation transport among quantum emitter ensembles in a waveguide, Optica Quantum 2 (6), 397-403