Control of Second Harmonic Generation in Doubly Resonant Aluminum Nitride Microrings to Address Rubidium Two-Photon Clock Transition

Abstract

Nonlinear optical effects have been studied extensively in microresonators as more photonics applications transition to integrated on-chip platforms. Due to low optical losses and small mode volumes, microresonators are demonstrably the state-of-the-art platform for second harmonic generation (SHG). However, the working bandwidth of such microresonator-based devices are relatively small, presenting a challenge for applications where a specifically targeted wavelength needs to be addressed. In this work, we analyzed the phase-matching window and resonance wavelength with respect to varying microring width, radius and temperature. A chip with precise design parameters was fabricated with phase-matching realized at the exact wavelength of two-photon transition of 85-Rubidium. This procedure can be generalized to any target pump wavelength in the telecom-band with picometer precision.

References in corpus (9)

• Experimental quantum teleportation
• Optical frequency comb generation from a monolithic microresonator
• Octave-spanning frequency comb generation in a silicon nitride chip
• Second-Harmonic Generation in Silicon Nitride Ring Resonators
• Self-referencing of an on-chip soliton Kerr frequency comb without external broadening
• Second harmonic generation in phase matched aluminum nitride waveguides
• Second Harmonic Generation in Graphene
• Electrical tuning and switching of an optical frequency comb generated in aluminum nitride microring resonators
• Probing of valley polarization in graphene via optical second-harmonic generation

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• III-Nitride nanophotonics for beyond-octave soliton generation and self-referencing
• Ultra-high-Q UV microring resonators based on single-crystalline AlN platform
• On-chip optical parametric oscillation into the visible: generating red, orange, yellow, and green from a near-infrared pump
• Efficient frequency conversion in a degenerate ${\chi }^{(2)}$ microresonator
• Parasitic loss in microring-waveguide coupling and its impact on wideband nonlinear photonics