Purcell Enhancement of a Cavity‐Coupled Emitter in Hexagonal Boron Nitride. Issue 2 (27th November 2021) - Fröch, Johannes E.
Abstract: Integration of solid‐state quantum emitters into nanophotonic circuits is a critical step towards fully on‐chip quantum photonic‐based technologies. Among potential materials platforms, quantum emitters in hexagonal boron nitride (hBN) have emerged as a viable candidate over the last years. While the fundamental physical properties have been intensively studied, only a few works have focused on the emitter integration into photonic resonators. Yet, for a potential quantum photonic material platform, the integration with nanophotonic cavities is an important cornerstone, as it enables the deliberate tuning of the spontaneous emission and the improved readout of distinct transitions for a quantum emitter. In this work, the resonant tuning of a monolithic cavity integrated hBN quantum emitter is demonstrated through gas condensation at cryogenic temperature. In resonance, an emission enhancement and lifetime reduction are observed, with an estimate for the Purcell factor of ≈15. Abstract : In this work, a monolithically cavity integrated single photon‐emitter from hexagonal boron nitride is demonstrated. By gas condensation tuning at cryogenic temperature, the optical resonance of the photonic crystal cavity is tuned and coupled to the emission wavelength, which enables the study of the Purcell enhanced single‐photon emitter.