Research

Telecom-Wavelength Quantum Dots
Quantum dot technology with emission in the telecom bands has matured over the last decade from first demonstrations of single and entangled photon emission to first implementations of quantum network technology such as quantum relays. This system is relatively well understood with spectral transitions ascribed to individual charge combinations populating the quantum dot before radiative recombination. Further, recent work suggests excellent photon coherence times, as well as optical access to and control of individual resident spins. These properties make quantum dot technology an exciting system for future spin-based quantum optics experiments.

Telecom-Wavelength Quantum Dots

Quantum dot technology with emission in the telecom bands has matured over the last decade from first demonstrations of single and entangled photon emission to first implementations of quantum network technology such as quantum relays. This system is relatively well understood with spectral transitions ascribed to individual charge combinations populating the quantum dot before radiative recombination. Further, recent work suggests excellent photon coherence times, as well as optical access to and control of individual resident spins. These properties make quantum dot technology an exciting system for future spin-based quantum optics experiments.

Coulour centres in semiconductors
Single impurities in semiconductors offer the potential of accessing neighbouring solid-state nuclear spins which have the long coherence times necessary for quantum memory implementations. At telecom wavelength, these systems are still in their infancy. A breakthrough has recently been reached using impurities in silicon, where isolated individual impurity centre could be accessed for the first time. These centres offer an intriguing playground exploring their symmetry and orbital composition, accessing individual spins optically or with the use of microwaves, and identifying coupling mechanisms to nuclear spins in the environment.

Coulour centres in semiconductors

Single impurities in semiconductors offer the potential of accessing neighbouring solid-state nuclear spins which have the long coherence times necessary for quantum memory implementations. At telecom wavelength, these systems are still in their infancy. A breakthrough has recently been reached using impurities in silicon, where isolated individual impurity centre could be accessed for the first time. These centres offer an intriguing playground exploring their symmetry and orbital composition, accessing individual spins optically or with the use of microwaves, and identifying coupling mechanisms to nuclear spins in the environment.