Phys.org May 10, 2021
For photons to deliver qubits on-demand in quantum systems, they need to be emitted in a deterministic, rather than probabilistic, fashion. An international team of researchers (Sweden, the Netherlands) has developed a process to harness the single-photon-emitting properties of hexagonal boron nitride (hBN) integrating it with silicon nitride waveguides to emit photons on-demand at room temperature. Their process precisely positions light-particles emitters in an integrated photonic circuit. In a hybrid approach, the team built the photonic circuits with respect to the quantum sources locations using a series of steps involving electron beam lithography and etching, while still preserving the high-quality nature of the quantum light. The results provide an important step toward deterministic, large scale, quantum photonic circuits at room temperature…read more. Open Access TECHNICAL ARTICLE
A close-up look at the integrated chip that emits photons. (Image: courtesy of Ali Elshaari)