Quantum Photonics

Integrated quantum photonics: Integrated quantum photonics mainly focus on on-chip single photon generation, photonic qubit process and single photon detecting. We use nonlinear photonic materials as waveguides for on on-chip entangled photon pair generation and photonic qubit control. We have fabricated aluminum nitride and lithium niobate waveguides that can generate photon pairs and control the photonic qubits. Final goal is the on-chip quantum simulation and quantum key distribution.

Diamond nanophotonics: We study NV centers in diamond as single photon sources. The research includes the single photon emitting efficiency improvement and accurate location control of NV center in diamond by specially designed structures.

Fundamental research on quantum information: Quantum physics is at the heart of quantum information science and technology. We are interested in studying fundamental aspects of quantum physics such as quantum coherence, entanglement, and quantum measurement.

Publication

H.-S. Jang et al., “Aluminum nitride integrated quantum photonic circuits”, submitted.
T.-Y. Hwang et al., “Sub-10 nm precision engineering of solid-state defects via nanoscale aperture array mask”, Nano Lett. 22, 1672 (2022).
S. Hong et al., “Demonstration of Complete Information Trade-Off in Quantum Measurement”, Phys. Rev. Lett. 128, 050401 (2022).
S.-W. Jeon et al., “Diamond photonic crystal mirror with a partial bandgap by two 2D photonic crystal layers”, Opt. Express 28, 39048 (2020).