Facilities

NSF names UC Santa Barbara home to its first Quantum Foundry, a center for developing materials and devices for quantum information-based technologies

A Quantum Leap
UC Santa Barbara is selected as the site of the nation’s first NSF-funded Quantum Foundry, a center for the development of materials and devices for quantum information-based technologies

Congrats to Yating and group for demonstration the first tunable single wavelength quantum dot (QD) laser directly grown on Si.

We demonstrate the first tunable single wavelength quantum dot (QD) laser directly grown on Si. A simple, integrable architecture is implemented without involving re-growth steps or sub-wavelength grating lithography. 16 nm tuning range was achieved with over 45 dB SMSR and output powers exceeding 2.7 mW per tuning wavelength. The choice of QD gain material promotes high lasing efficiency in the presence of defects introduced by lattice-mismatched growth.