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Feb 26 (Thu) @ 9:00am: "High Power Quantum Dot Gain on Silicon by Heterogeneous Micro Transfer Print Integration," Diya Hu, ECE PhD Defense

Date and Time

Location: Engineering Science Bldg (ESB), Room 2001
Zoom Link: https://ucsb.zoom.us/j/86137266642
Research Area: Electronics & Photonics
Research Keywords: Semiconductor Lasers, III–V/Si Photonic Integrated Circuits, Micro-Transfer Printing

Abstract

Demand for high bandwidth interconnects for data centers, high performance computers, and other applications including sensing, 5G/6G mobile networks, and IoT, has driven the development of high-power on-chip light sources for silicon photonics (SiPh). Typically, laser sources are coupled externally, co-packaged, or integrated through flip-chip or chiplets bonding, however, it is becoming increasingly desirable to integrate lasers and high-density gain with more scalable approaches. Micro-transfer print (MTP) integration involves the transfer of thin film coupons from native III-V substrates to silicon (Si). MTP provides a path to high throughput, low cost, high integration density and process maturity of III-V materials realized on native substrates. To date, demonstrations of MTP for SiPh have been limited to only a few mW of coupled power, therefore, improvements are required for higher coupled power and high efficiency. This dissertation focuses on the development of an MTP platform that integrates high-power etched-facet O-band quantum dot (QD) lasers with low-loss silicon nitride (SiN) waveguides on Si. The method systematically improves the power handling and coupling efficiency, demonstrated record coupled power level greater than 100 mW.

Bio

Diya Hu is a PhD candidate in the Electrical and Computer Engineering department advised by Professor Jonathan Klamkin. She received her M.S. in Electrical and Computer Engineering from University of California, Santa Barbara in 2022, and B. Eng. in Electronic and Information Engineering from the Hong Kong Polytechnic University in 2019. Her research focuses on the heterogeneous integration of high-power quantum dot gain in silicon photonics.

Hosted By: ECE Professor Jonathan Klamkin

Submitted By: Diya Hu <diya@ucsb.edu>