IQIM Postdoctoral and Graduate Student Seminar

Friday May 20, 2022 12:00 PM

Narrow transparency and collective emission in an ensemble of rare-earth ions coupled to a nanophotonic cavity

Speaker: Mi Lei
Location: East Bridge 114

IQIM Seminar followed by lunch

Abstract: Light-matter interfaces based on emitters coupled to a nanophotonic cavity are attractive candidates for quantum technologies such as quantum memories and transducers. High cooperativity is needed for these applications to realize impedance matching for high efficiency. Here, we study an inhomogeneously broadened ensemble of Ytterbium-171 ions doped in yttrium orthovanadate coupled to a nanophotonic cavity with high cooperativity. In this talk, I will present our observation of a narrow transparency window in the cavity reflection spectrum. Unlike EIT, where the transparency is due to the destructive interference between dressed states, the transparency here results from the destructive interference between pairs of two-level emitters across the inhomogeneous line. Meanwhile, coherent excitation of the system within this window enables us to observe superradiance and subradiance

Attendees joining in person must have a valid Caltech UID. Please show your UID at the door [114 E. Bridge].

This seminar will be held in person only.

Series IQIM Postdoctoral and Graduate Student Seminar Series

Contact: Marcia Brown at 626-395-4013