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UID:0-780@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20211123T110000
DTEND;TZID=Europe/Paris:20211123T120000
DTSTAMP:20211117T114530Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-melanie-lebental/
SUMMARY:Seminaire du LPTMS : Mélanie Lebental (LUMIN) - Salle des séminai
 res du FAST et du LPTMS\, bâtiment Pascal n°530 - 23 Nov 21 11:00
DESCRIPTION:Quantum chaos and geodesics: towards non-euclidean photonics\nM
 élanie Lebental (LUMIN)\nOnsite seminar + zoom (Meeting ID: 984 4152 4540
 \, Passcode: p5WA0A).\n\nQuantum chaos is a research field dedicated to s
 emiclassical physics [1\,2]\, i.e. the relationship\nbetween a quantum sys
 tem and its classical counterpart. The predictions are investigated in\nan
 y wave system\, namely quantum\, acoustics\, microwaves\, optics\,… Micr
 olasers are a good platform to implement the predictions of quantum chaos.
  Reciprocally\, semi-classical physics provides efficient theoretical tool
 s to optimize photonic devices\, in particular the "trace formula" which d
 escribes the spectrum as a sum over periodic classical trajectories. I wil
 l review some of these results [3] and discuss on-going works on bifurcati
 on theory and the corresponding microlaser experiments.\n\nRecently it bec
 ame possible to fabricate three-dimensionnal (3D) microlasers with high op
 tical\nquality by direct laser writing [4]\, in particular curved surface-
 like microlasers\, leading to\nthe emerging domain of non-Euclidean photon
 ics. Actually\, the shortest path between\ntwo points within a curved surf
 ace is not the straight line anymore\, but is called a "geodesic".\nThe co
 rresponding trace formula should then be a sum over periodic geodesics. We
  checked this hypothesis with Möbius strip microlasers and provided exper
 imental and numerical evidences that the laser modes were indeed located a
 long periodic geodesics [5].\n\n[1] M. Brack and R. K. Bhaduri\, Semiclass
 ical physics\, Addison-Wesley Publishing Company (1997).\n\n[2] H.-J. Stö
 ckmann\, Quantum chaos\, an introduction\, Cambridge University Press (199
 9).\n\n[3] A. Pascal\, A. Pascal\, S. Bittner\, B. Dietz\, A. Trabattoni\,
  C. Ulysse\, M. Romanelli\,\nM. Brunel\, J. Zyss\, and M. Lebental\,\nWave
 s and rays in plano-concave laser cavities\, Part II: a semiclassical appr
 oach\,\nEuropean Journal of Physics\, vol. 38\, 034011 (2017).\n\n[4] M. A
 . Guidry\, Y. Song\, C. Lafargue\, R. Sobczyk\, D. Decanini\, S. Bittner\,
  B. Dietz\,\nL. Huang\, J. Zyss\, A. Grigis\, and M. Lebental\,\nThree-dim
 ensional micro-billiard lasers: The square pyramid\,\nEurophysics Letters\
 , vol. 126\, 64004 (2019).\n\n[5] Yalei Song\, Y. Monceaux\, S. Bittner\, 
 Kimhong Chao\, H. M. Reynoso de la Cruz\,\nC. Lafargue\, D. Decanini\, B. 
 Dietz\, J. Zyss\, A. Grigis\, X. Checoury\, and M. Lebental\,\nMöbius Str
 ip Microlasers: A Testbed for Non-Euclidean Photonics\nPhys. Rev. Lett. vo
 l. 127\, 203901 (2021).
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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