Description
Quantum Dots (QDs) are nanoscale semiconductor structures that can emit single photons, making them attractive building blocks for quantum applications. When embedded in photonic disk resonators, their emission can be greatly enhanced through the Purcell effect. However, for QDs to be practically useful, their emission must be stable and tunable. These are two challenges this project aims to address.
By fabricating disk resonators with a p-i-n junction, where the QDs sit in the intrinsic middle layer, we can apply a voltage across the structure. This serves both the purpose of stabilizing the emission by suppressing charge noise in the QD surroundings, as well as tuning the emission wavelength using the quantum confined DC Stark effect. The electric field shifts the energy levels of the QD, making it tunable.
Part of this project was to design nanostructures that gate the QDs inside the disk resonator, fabricate them in the cleanroom and finally characterize them in the optical lab. This work moves toward a fully controllable QD embedded system - a promising component for future quantum technologies.
| Field of study | Quantum Physics |
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| Supervisor | Leonardo Midolo |