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Please join us for this Week's Seminar with Edgar Perez at 4:30 in P123. The presentation will be preceded by cookies and coffee in the physics student lounge. Students are encouraged to join this week's speaker for lunch at noon on the day of the presentation. If you can join Edgar for lunch, please RSVP to Meg Andrews at andrewsm@reed.edu.  

Photonic Integration of High Performance Optical Parametric  Oscillators and Quantum Dots 

Integrated photonic devices, like photonic crystals, microring resonators, and quantum emitters, produce novel states of light, like solitons or single photons, through carefully engineered light- matter interactions. However, as devices and experiments become increasingly sophisticated, often making use of multiple cutting-edge technologies, it is equally important to realize practical and high-performance integration techniques to mediate spectral and spatial interconnects from device-to-device and device-to-lab. This presentation will consider the role of frequency conversion, optical interconnects, and circular Bragg gratings (CBGs) in the comprehensive integration of quantum emitters. In the
presented strategy, a large-bandwidth optical parametric oscillator (OPO) will serve as a spectral link between a single laser and one (or more) emitters. I will demonstrate that through the suppression of parasitic processes, a single OPO device can provide strong conversion efficiency (up to 29%) and high output power (>18mW on chip), making them wavelength- flexible sources with enough power to pump/excite downstream systems. To spatially link the OPO with said systems, I will review our use of direct laser written lenses and waveguides. Finally, I will describe the integration of a quantum dot in a CBG cavity, which Purcell enhances its radiative rate while increasing the collection efficiency of its single photon emission into a direct laser written waveguide. I will conclude with new designs for CBGs with high quality factors (Q>10k), which may lead to new regimes of operation for these devices.

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