Alp Sipahigil (Advisor)

Research advised by BSAC Co-Director Alp Sipahigil

Sipahigil Group: List of Projects | List of Researchers

BPN980: Spin-Photon Interfaces in Silicon Photonics

Hanbin Song

Xueyue (Sherry) Zhang

Lukasz Komza

Niccolo Fiaschi

Yu-Lung Tang

Yiyang Zhi

2024

Point defects in crystalline materials can introduce localized defects states with optical transitions, creating color centers. Color centers in silicon have recently shown their potential as telecom-band single photon emitters. Leveraging the mature semiconductor fabrication techniques, silicon color centers can be fabricated on a large scale and are compatible with integrated photonics. Among all the silicon color centers investigated so far, T centers provide a spin-photon interface suitable for quantum networking and communication applications. In this project, we demonstrate coherent...

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BPNX1032: A Quantum Nano-Electromechanical Transducer based on Interface Piezoelectricity

Kadircan Godeneli

Leo Sementilli

2025

Transduction of signals between electrical, mechanical, and optical domains is central to modern computing, sensing, and communication systems. Emerging quantum computing, sensing, and communication technologies also require the development of transducers capable of converting quantum-level signals such as single photons and phonons with high efficiency and low loss. Traditional piezoelectric materials such as aluminum nitride and lithium niobate are widely used in classical piezoelectric and electro-optic transducers. However, for quantum applications, these thin films have large defect...

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BPNX1030: Coupling a Single Spin Qubit to Superconducting Circuits on Silicon

Zihuai Zhang

2025

Silicon, a mature platform for the semiconductor industry, has become a leading platform for future quantum technologies. As a high-purity material, it serves as a low-noise host for a variety of spin qubits. As a low-loss material, it is a desirable substrate and material platform for next generation quantum devices. In this project, we aim to engineer a hybrid quantum system on silicon with superconducting circuits and acceptor-based spin qubits. We plan to fabricate high-impedance resonators using high kinetic inductance superconductors to enable strong electric dipole coupling between...

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Kerry Yu

Graduate Student Researcher

Electrical Engineering and Computer Sciences

Professor Alp Sipahigil (Advisor)

Ph.D. 2029 (Anticipated)

Kerry Yu is a Ph.D. candidate in Electrical Engineering and Computer Sciences (EECS) at UC Berkeley, advised by Prof. Alp Sipahigil. He earned his M.Sc. in Electrical and Computer Engineering from UCLA and High Honors B.Sc. in EECS from UC Berkeley. His current research focuses on the intersection between microwave and phononic engineering to mitigate the decoherence of superconducting qubits. Kerry is also a recipient of the NSF Graduate Research Fellowship.

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Lukasz Komza

Graduate Student Researcher

Physics

Professor Alp Sipahigil (Advisor)

Ph.D. 2026 (Anticipated)

Lukasz Komza is a Physics PhD student at the University of California, Berkeley. He started working with Alp Sipahigil in the Quantum Devices Group in 2021 on the characterization and integration of silicon qubits in photonics. Prior to starting his PhD, Lukasz interned at Bell Labs in Murray Hill, NJ, working with Michael Eggleston on optical coherence tomography. He studied quantum light sources in 2D materials with Stefan Strauf during his undergraduate education, where he received the Alfred M. Mayer prize.

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Hanbin Song

Graduate Student Researcher

Materials Science & Engineering

Professor Alp Sipahigil (Advisor)

Ph.D. 2027 (Anticipated)

BSAC Fall 2024 Research Review Presenter

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Xueyue (Sherry) Zhang

Alumni

Electrical Engineering and Computer Sciences

Professor Alp Sipahigil (Advisor)

PostDoc 2023-2024

Xueyue (Sherry) Zhang is an Assistant Professor in the Department of Applied Physics and Applied Mathematics at Columbia University starting January 2025. She earned her B.Eng. with honors in Microelectronics Engineering from Tsinghua University in 2017 and Ph.D. in Applied Physics from Caltech in 2023 supervised by Dr. Oskar Painter. Dr. Zhang then joined UC Berkeley as a Miller Postdoctoral Fellow, working with Dr. Alp Sipahigil in EECS and Physics.