ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

SZFI SeminarMartina HentschelTechnische Universität Chemnitz, Germany (host: 
Penc Karlo)Mesoscopic optics: from ray-wave correspondence to non-Hermitian 
photonicsTuesday, 10 September 2024, 10:00, KFKI Campus, Bldg. 1, 2nd floor, 
Conference RoomOptical microcavities have proven to be a fruitful mesoscopic 
model system in the field of quantum chaos. With typical dimensions on the 
micrometer scale, these dielectric microdisk resonators have diameters of 
several to several dozens wavelengths, making them perfectly suited to study 
interference-induced deviations from the ray picture. However, a (surprising) 
correspondence between ray and wave simulation results as well as 
experimental measurements - all taking place in different wavelength regimes 
- was found, and marked a significant point in their understanding and 
efficient, application oriented modeling. While the confinement of light by 
total internal reflection, and the corresponding whispering-gallery type 
resonances with very high quality factors, are the foundation for their use 
as microlaser [1], they remain intrinsically open and non-Hermitian systems. 
We illustrate this behavior for a system of two coupled deformed microdisk 
resonators [2] and show the emerging chirality and the formation of 
exceptional points. Moreover, we will briefly discuss coupling effects in the 
far-field emission characteristics of microcavity arrays.[1] Q. J. Wang et 
al., New J. Phys. 11, 125018 (2009) and other. [2] T. Rodemund et al., APL 
124, 051107 (2024). Minden érdeklődőt szívesen látunk! - Everyone is 
welcome to attend.Attila Nagysem-admin AT szfki.hu