Broadband enhancement of light-matter interaction in photonic-crystal cavities integrating site-controlled Ga(AsN)/Ga(AsN): $H$ quantum dots.

Felici M., Pettinari G., Biccari F., Boschetti A., Birindelli S., Younis S., Gurioli M., Vinattieri A., Gerardino A., Businaro L., Hopkinson M., Rubini S., Capizzi M., Polimeni A.
  Mercoledì 13/09   09:00 - 13:00   Aula A107   II - Fisica della materia
In this work, the site-controlled quantum dots (QDs) obtained by spatially selective hydrogenation of Ga(AsN) are deterministically integrated with photonic-crystal microcavities. Remarkably, the cavity-induced enhancement of the QD spontaneous emission rate remains way above unity for QD-microcavity energy detunings up to $\sim 3.5$ meV, well beyond the limits set by Jaynes-Cummings theory (1--2 meV). Such broadband enhancement, associated with the role played by phonons in mediating light-matter interaction in crystalline solids, significantly relaxes the requirements for the realization of coupled QD-cavity systems, and will prove crucial for applications based on the integration of more than one QD within a single microcavity.