BEGIN:VCALENDAR
METHOD:PUBLISH
PRODID:www-lightmatter-fau-de//Events//EN
VERSION:2.0
BEGIN:VEVENT
SUMMARY:Talk: Multimode microwave-to-optical transduction with high-ov
 ertone bulk acoustic resonators
UID:040000008200E00074C5B7101A82E00800000000E0DF0F317B96DC010000000000
 00000010000000236C71B762FF534CB974978086FF250E
DESCRIPTION:Organizer: Lehrstuhl für Experimentalphysik (Eichler) Spe
 aker: Benjamin Neubauer Title: Multimode microwave-to-optical transduc
 tion with high-overtone bulk acoustic resonators Abstract: A major cha
 llenge in realizing distributed quantum networks is linking supercondu
 cting circuits to optical fibers. Quantum transducers bridging microwa
 ve and optical frequencies are an essential building block in this eff
 ort. Their operation requires an efficient nonlinear interaction to me
 diate frequency conversion of single quanta with near-unity efficiency
 . In this talk\, I will present a transducer design developed in the H
 ybrid Quantum Systems Group at ETH Zurich that employs a high-overtone
  bulk acoustic resonator (HBAR) as an intermediary oscillator. The HBA
 R couples to superconducting circuits via piezoelectric interactions a
 nd to laser light via optomechanical Brillouin scattering\, enabling f
 ull microwave-to-optical transduction. A characteristic of this design
  is that the frequency spacing between acoustic eigenmodes of the HBAR
  is smaller than the transducer bandwidth\, so that multiple acoustic 
 modes participate in the transduction process. During my Master&#8217\
 ;s thesis I worked on engineering the acoustic mode spectrum through g
 eometry simulations to maximize the transduction efficiency. In additi
 on\, I performed electromechanical measurements on device prototypes t
 o characterize acoustic mode lifetimes and electromechanical coupling 
 strengths.
DTSTART:20260206T080000Z
DTEND:20260206T084500Z
LOCATION:Seminar room 00.103 (A3) \, Staudtstr. 7
DTSTAMP:20260421T000702Z
END:VEVENT
END:VCALENDAR