Ming C. Wu (Advisor)

Research Advised by Professor Ming C. Wu

BPN974: Lidar-Camera Fusion for Autonomous Driving

Philip L. Jacobson
2022

Within the past few decades, the goal of fully-autonomous vehicles has moved from a thought experiment to a potential reality thanks to advances in machine intelligence. One of the key challenges to still be overcome is the building of robotic perception systems which can achieve performance on-par with or surpassing that of humans. Currently, most autonomous driving researchers rely on several different modalities for collecting visual information, namely lidar, radar, and cameras. Although relying on lidar for perception has the drawback of high cost, maturing lidar technology has opened...

Fabrication Tolerant Inverse Design Grating Couplers for Scalable Trapped Ion Quantum Computing

Daniel Klawson
Mizuki Shirao
Sara Mouradian
Ming C. Wu
2022

A fabrication tolerant Si grating coupler for 1.762 µm operation is optimized with inverse design, allowing for −30 dB crosstalk between a pair of 133Ba+ trapped ion qubits within expected fabrication variation.

Large-scale Silicon Photonics Focal Plane Switch Array for Optical Beam Steering

Xiaosheng Zhang
Kyungmok Kwon
Johannes Henriksson
Jianheng Luo
Ming C. Wu
2021

We report on 128×128-element two-dimensional silicon photonics focal plane switch arrays with microelectromechanical-system optical switches for random-access optical beam steering. A 70°×70° field-of-view and sub-MHz steering speed are experimentally demonstrated.

A Large-Scale Microelectromechanical-Systems-Based Silicon Photonics LiDAR

Xiaosheng Zhang
Kyungmok Kwon
Johannes Henriksson
Jianheng Luo
Ming C. Wu
2022

Three-dimensional (3D) imaging sensors allow machines to perceive, map and interact with the surrounding world1. The size of light detection and ranging (LiDAR) devices is often limited by mechanical scanners. Focal plane array-based 3D sensors are promising candidates for solid-state LiDARs because they allow electronic scanning without mechanical moving parts. However, their resolutions have been limited to 512 pixels or smaller2. In this paper, we report on a 16,384-pixel LiDAR with a wide field of view (FoV, 70° × 70°), a fine addressing resolution (0.6° × 0.6°), a narrow beam...

Low-Loss Wafer-Bonded Silicon Photonic MEMS Switches

Amirmahdi Honardoost
Johannes Henriksson
Kyungmok Kwon
Jianheng Luo
Ming C. Wu
2022

We report on 32×32 silicon photonic switches realized through wafer bonding. Broadband operation is demonstrated over 1260-1320 nm range. The maximum on-chip loss is measured to be 4 dB and the cross-talk is −80 dB.

Keywords: Wafer bonding, Optical losses, Optical switches, Microswitches,Silicon photonics, Loss measurement, Optical fiber communication

Microlens Input/Output Couplers for Silicon Photonic Chips

Jianheng Luo
2022
Fall 2022 BSAC Research Review Presentation View Slides View Presentation at 29:35

BPN957: MEMS Switch Based Integrated FTIR

Jianheng Luo
Johannes Henriksson
2022

This project aims to develop integrated FTIR technology for material detection using MEMS-based photonic switch as building block. This implementation of integrated FTIR promises high resolution (1cm^-1) on small chip size ( 5mm x 5mm).

Project ended 08/22/2022

Sangyoon Han

Alumni
Electrical Engineering and Computer Sciences
Professor Ming C. Wu (Advisor)
Ph.D. 2016, PostDoc 2016

Sangyoon Han is an alumnus of BSAC and currently an assistant professor at DGIST, Korea. He received the B.S. degree in Electrical Engineering from the Seoul National University in 2010, and the Ph.D. degree in Electrical Engineering and Computer Sciences from the University of California, Berkeley in 2016. From 2016 to 2020, he was a postdoctoral researcher at the physics department, KAIST, Korea. His research interests include silicon photonics, non-linear optics, MEMS, heterogeneous integration, and LIDAR. He has authored and co-authored over 30 papers in leading technical journals and...

Packaging of Si Photonic MEMS Switches

Johannes Henriksson
2022
Spring 2022 BSAC Research Review Presentation View Slides View Presentation

Fast optical switches have been proposed as a promising alternative to enable continual scaling of data centers with increasing size and data rates We have previously demonstrated the largest integrated optical switch reported to date, a 240x240...

Amirmahdi Honardoost

Postdoctoral Researcher
Electrical Engineering and Computer Sciences
Professor Ming C. Wu (Advisor)
PostDoc 2022

I received a Ph.D. degree in Electrical Engineering from the University of Central Florida UCF, Orlando, FL, in May 2020. During my Ph.D. studies at UCF, I was with the CREOL, the College of Optics and Photonics, as a graduate research assistant in Prof. Sasan Fathpour's IPES group, working on design, fabrication, and characterization of photonic integrated circuits focusing on thin-film lithium niobate devices such as electro-optic modulators, and second-order nonlinear optical frequency converters. From May to August 2019, I was with the imec USA, as a photonics research intern. In May...