Hao-Jing Chen (陈豪敬)

I am a Postdoctoral Scholar in Applied Physics at the California Institute of Technology (Caltech), where I work with Prof. Kerry Vahala. I am also a co-founder of the ultralow-loss Ge:silica integrated photonics platform.

My research focuses on integrated photonics and its applications. My long-term ambition is to bring the coherence and ultralow loss of optical fiber into scalable photonic chips, advancing integrated photonics from isolated device demonstrations toward practical platforms for fundamental physics tests, universal quantum computing, and high-capacity optical communications in AI infrastructure.

Highlighted Work

Towards fibre-like loss for photonic integration from violet to near-infrared
Nature 649, 338–344 (2026)

Developed an ultralow-loss Ge:silica integrated photonics platform that brings fibre-inspired material performance to CMOS-compatible chips, enabling record-low waveguide propagation loss and highly coherent on-chip laser sources from the visible to the near-infrared. This work opens a scalable path toward integrated systems for precision metrology, communications, and quantum technologies.

Featured by Caltech News and MIT Technology Review China. The work was also recognized by the Optical Fiber Communication Conference and Exposition (OFC) 2026 as a Top-Scored Paper and one of only three papers selected worldwide for an OFC 2026 official news release. In the release, program chair Takashi Matsui described the result as demonstrating “fiber-class waveguide performance on chip” and highlighted the significance for precision and quantum photonics.

Prospective Collaboration

Any inquiries from researchers of the broader academic and industrial community are welcome! Please contact me via email: haojing@caltech.edu.