Scalable, reliable single-photon sources are essential for quantum photonic technologies. In particular, a fiber-based platform is desirable form for practical single-photon devices. Although recent advances with solid-state quantum emitters on fiber platforms have enabled the generation of single photons with high-performance, the reliable, scalable implementation of multiple sources on the compact fiber platform remains challenging. Here, we present a multiple, tunable array of quantum photonic devices in the fiber-based platform. We developed the selective integration for multiple quantum dot devices, and implemented multi-channel single-photon device based on a V-groove fiber platform. The device offers scalability, tunability, high fabrication yield, and high single-photon coupling efficiency. Therefore, this fiber-integrated quantum platform provides a scalable and reliable multichannel single-photon source.
Versatile, tunable, and potentially scalable single-photon sources are a key asset in emergent photonic quantum technologies. In this work, a single-photon source based on WS
2 micro-domes, created via hydrogen ion irradiation, is realized and integrated into an open, tunable optical microcavity. Single-photon emission from the coupled emitter-cavity system is verified via the second-order correlation measurement, revealing a
g(2)(τ=0) value of 0.3. A detailed analysis of the spectrally selective, cavity enhanced emission features shows the impact of a pronounced acoustic phonon emission sideband, which contributes specifically to the non-resonant emitter-cavity coupling in this system. The achieved level of cavity-emitter control highlights the potential of open-cavity systems to tailor the emission properties of atomically thin quantum emitters, advancing their suitability for real-world quantum technology applications.
Progress in the field of integrated quantum optics has set the stage for the development of an integrated platform for quantum information processing with photons. For the GaAs system, all key functionalities, including single-photon sources and detectors, photon-number-resolving detectors, integrated autocorrelators and tunable Mach-Zehnder-interferometers have already been realized and tested. This lays the foundation for a fully-integrated quantum photonic technology, with potential applications in quantum simulation and computing. A simple quantum photonic integrated circuit will be able to perform a second-order auto-correlation measurement and to demonstrate two-photon interference of single photons that are generated, filtered, processed and detected on the very same chip. (Picture: Christof P. Dietrich et al., 10.1002/lpor.201500321 pp. 870–894, in this issue)