GaAs integrated quantum photonics: Towards compact and multi‐functional quantum photonic integrated circuits

Abstract

The recent progress in integrated quantum optics has set the stage for the development of an integrated platform for quantum information processing with photons, with potential applications in quantum simulation. Among the different material platforms being investigated, direct-bandgap semiconductors and particularly gallium arsenide (GaAs) offer the widest range of functionalities, including single-and entangled-photon generation by radiative recombination, low-loss routing, electro-optic modulation and single-photon detection. This paper reviews the recent progress in the development of the key building blocks for GaAs quantum photonics and the perspectives for their full integration in a fully-functional and densely integrated quantum photonic circuit.

Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters

“…The superior optical performance and more sophisticated and automated image analysis tools have greatly increased the throughput of this technique. As a result we believe that it will be valuable in future demonstrations of QD-based devices for integrated quantum photonics 25 . In the future, a combination of automated sample positioning, focus adjustment (through the sample height), and stage encoder readout may enable stitching of multiple fields together, further increasing the throughput and capability of the system.…”

Intrinsic and environmental effects on the interference properties of a high-performance quantum dot single-photon source

“…A central requirement for the implementation of single photons in quantum communication, quantum networks, linear optical quantum computing, and quantum teleportation is their degree of indistinguishability [1][2][3][4][5]. To this end, cold atoms, single ions, isolated molecules, optically active defects in diamonds, silicon carbide, and layered materials have all been identified as competitive sources of nonclassical light [6][7][8][9][10][11][12][13].…”

Anti-stiction coating for mechanically tunable photonic crystal devices

“…Their combination with photonic crystals (PhC) allows the control of the frequencies of optical modes without introducing additional losses [2]. For this reason, their use has attracted attention in quantum photonic integrated circuits [3], for instance to control the relative detuning between cavities and emitters [4,5] or to enhance the light-matter interaction [6].…”