Abstract
Quantum photonic integrated circuits hold great potential as a novel class of semiconductor technologies that exploit the evolution of a quantum state of light to manipulate information. Quantum dots encapsulated in photonic crystal structures are promising single-photon sources that can be integrated within these circuits. However, the unavoidable energy mismatch between distant cavities and dots, along with the difficulties in coupling to a waveguide network, has hampered the implementation of circuits manipulating single photons simultaneously generated by remote sources. Here we present a waveguide architecture that combines electromechanical actuation and Stark-tuning to reconfigure the state of distinct cavity-emitter nodes on a chip. The Purcell-enhancement from an electrically controlled exciton coupled to a ridge waveguide is reported. Besides, using this platform, we implement an integrated Hanbury-Twiss and Brown experiment with a source and a splitter on the same chip. These results open new avenues to scale the number of indistinguishable single photons produced on-demand by distinct emitters.
Highlights
The ability to program the properties of deterministic single-photon sources such as quantum dots (QDs) and their electromagnetic environment will play a crucial role in the realization of large-scale quantum photonic integrated circuits (QPICs) able to simulate complex molecules and to perform boson sampling experiments.[1,2]
The coupling of Purcell-enhanced single photons generated in a photonic crystal cavity (PhCC) to a ridge waveguide has been previously demonstrated, either employing a monolithic approach relying on a single material[16] or, more recently, adopting a hybrid GaAs/SiN photonic crystal nanobeam.[17]
In what follows we present the low-temperature (10 K) tuning capabilities of the waveguidecoupled cavity quantum electrodynamics (c-QED) nodes described in Sec
Summary
Applications consists in simultaneously reconfiguring the status of multiple cavity quantum electrodynamics (c-QED) nodes by external controls. RWs can be employed to transport single photons to other elements of the chip with low loss and to distribute the optical pump among many sources, in order to simultaneously trigger the single-photon emission from remote cavity-emitter nodes. The coupling of Purcell-enhanced single photons generated in a photonic crystal cavity (PhCC) to a ridge waveguide has been previously demonstrated, either employing a monolithic approach relying on a single material[16] or, more recently, adopting a hybrid GaAs/SiN photonic crystal nanobeam.[17] the deterministic control of the dot and cavity wavelength, essential for multi-source experiments, and the integration with other photonic elements were not addressed in these demonstrations. The developed WG-coupled architecture equipped with electrical gates has been adopted to suppress the energy mismatch among separate cavities and emitters
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