Double-layer metasurface for enhanced photon up-conversion

A quantum dot molecule (QDM) device with excellent optical properties is demonstrated. The QDMs are deterministically integrated into a photonic structure with a circular Bragg grating (CBG). Using JCMsuite, the layer design and the geometry of the CBG is numerically optimized. The measured photon extraction efficiency of up to (24 ± 4)% is in good agreement with numerical simulations.

J. Schall, et al. Bright Electrically Controllable Quantum-Dot-Molecule Devices Fabricated by In Situ Electron-Beam Lithography. Adv. Quantum Technol., 4, 2100002 (2021).

DOI: 10.1002/qute.202100002