Alp Sipahigil (Advisor)

Research advised by BSAC Co-Director Alp Sipahigil

Sipahigil Group:  List of Projects | List of Researchers

BPN967: Quantum Emitters in Silicon Photonics

Lukasz Komza
Yu-Lung Tang
Hanbin Song
Zihuai Zhang
2023

The G center, an atom-like single-photon emitter in silicon, has emerged as a promising candidate for realizing a quantum-coherent light source in integrated photonics. Our recent work demonstrating two-photon quantum interference with a single waveguide-integrated G center highlights the utility of G centers for photonic quantum information applications. However, improvements in the optical coherence properties of the G center must be achieved to enable its technological implementation. We will address this challenge by leveraging the integration capabilities of the silicon platform...

Zihuai Zhang

Postdoctoral Researcher
Electrical Engineering and Computer Sciences
Professor Alp Sipahigil (Advisor)

Zihuai is a postdoctoral researcher in Prof. Alp Sipahigil's group, working on solid-state quantum systems. He earned his Ph.D. in electrical and computer engineering in 2022 from Princeton University, where he worked on engineering coherent quantum defects in diamond in the lab of Prof. Nathalie de Leon. He received his B.S. in physics in 2016 from University of Science and Technology of China.

BSAC Spring 2023 Research Review Presenter

Phonon-Protected Superconducting Qubit

Mutasem Odeh
2022
Fall 2022 BSAC Research Review Presentation View Slides View Presentation at 10:05 BSAC Best Paper - Spring 2023

BPN981: Suppressing Energy Losses in Compact Superconducting Qubits

Kadircan Godeneli
Mutasem Odeh
Eric Li
2022

State-of-the-art quantum computers currently have qubit gate error rates that are too large for practical computing. Quantum error correction can protect computations from physical errors by encoding logical qubits in many physical qubits. However, physical qubit error rates need to be sufficiently low to minimize resource overhead and suppress errors. As a result, compact qubit designs with small dissipation and error rates are crucial to scaling up a fault-tolerant quantum computer. In this project, we aim to address the scaling up of superconducting quantum processors by...

Indistinguishable Photons from an Artificial Atom in Silicon Photonics

Lukasz Komza
Polnop Samutpraphoot
Mutasem Odeh
Yu-Lung Tang
Milena Mathew
Jiu Chang
Hanbin Song
Myung-Ki Kim
Yihuang Xiong
Geoffroy Hautier
Alp Sipahigil
2022

Silicon is the ideal material for building electronic and photonic circuits at scale. Spin qubits and integrated photonic quantum technologies in silicon offer a promising path to scaling by leveraging advanced semiconductor manufacturing and integration capabilities. However, the lack of deterministic quantum light sources, two-photon gates, and spin-photon interfaces in silicon poses a major challenge to scalability. In this work, we show a new type of indistinguishable photon source in silicon photonics based on an artificial atom. We show that a G center in a silicon waveguide can...

Polnop Samutpraphoot

Alumni
Electrical Engineering and Computer Sciences
Professor Alp Sipahigil (Advisor)
PostDoc 2022

BSAC's Best: Fall 2022 Awards Announced

September 28, 2022

BSAC would like to thank all of the researchers who presented their research during BSAC's Fall 2022 Research Review on September 21st.

BSAC Industrial Members voted for the outstanding paper and presentations and the results are in. Please join BSAC in congratulating the recipients of the Fall 2022 Best of BSAC honors, Alex Moreno, Mutasem Odeh, and Vivian Wang!

Outstanding Presenter...

BPN966: Cryogenic Fiber Coupling for Silicon Quantum Photonics

Polnop Samutpraphoot
Lukasz Komza
Mutasem Odeh
Milena Mathew
Myung-Ki Kim
2022

We introduce a method for achieving high-efficiency and broadband fiber interfaces to silicon photonic devices at cryogenic temperatures, utilizing edge coupling between waveguides and lensed fibers. We will describe the simulation, design, and fabrication of single-sided waveguides featuring Bragg mirrors and tapered mode converter optimized for maximum photon collection from emitters in the devices. We then present fabrication techniques, including deep etching for edge coupling, as well as the experimental setup used to test our devices at cryogenic temperatures. Our method will...