# A silicon photonic add-drop filter for quantum emitters

## TL;DR

This paper demonstrates the integration of quantum dots with a silicon photonic add-drop filter, enabling on-chip filtering and routing of single photons for quantum information applications.

## Contribution

It introduces a silicon microdisk resonator that filters and controls quantum dot emission on-chip, advancing integrated quantum photonics.

## Key findings

- Quantum dots integrated with silicon microdisk resonator.
- Tunable control of single-photon transmission.
- Potential for on-chip quantum information processing.

## Abstract

Integration of single-photon sources and detectors to silicon-based photonics opens the possibility of complex circuits for quantum information processing. In this work, we demonstrate integration of quantum dots with a silicon photonic add-drop filter for on-chip filtering and routing of telecom single photons. A silicon microdisk resonator acts as a narrow filter that transfers the quantum dot emission and filters the background over a wide wavelength range. Moreover, by tuning the quantum dot emission wavelength over the resonance of the microdisk we can control the transmission of the emitted single photons to the drop and through channels of the add-drop filter. This result is a step toward the on-chip control of single photons using silicon photonics for applications in quantum information processing, such as linear optical quantum computation and boson sampling.

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Source: https://tomesphere.com/paper/1903.09155