Judith Su

Judith Su

@judithsu.bsky.social

Associate Professor, The University of Arizona; http://wp.optics.arizona.edu/jsu/

177 followers259 following50 posts

Judith Su
@judithsu.bsky.social

We combine resonantly enhanced sensing with spectral fingerprinting by letting gas molecules interact directly with a comb-generating microtoroid optical resonator. Our new preprint reports an estimated 178-ppt methane detection limit with low humidity cross-sensitivity. arxiv.org/abs/2610.24338

arxiv.orgMicrocomb spectral fingerprinting enables parts-per-trillion methane detection with low humidity cross-sensitivityOptical frequency combs have transformed molecular spectroscopy by enabling broadband, high-resolution analysis, yet they are conventionally used as light sources to interrogate external samples. Here...
Judith Su
@judithsu.bsky.social

Our lab's first quantum photonics preprint is out! We present an electrically tunable silica microtoroid that preserves polarization entanglement while enabling frequency-bin encoding. Preprint: arxiv.org/abs/2607.03437

arxiv.orgDesign of an Electrically Tunable Microtoroid for Frequency Selection of Polarization-Entangled PhotonsEncoding quantum information into discrete optical frequencies, or "frequency bins," uses different colors of light as additional information channels, allowing each photon to carry more information t...
Judith Su
@judithsu.bsky.social

Honored to receive the Excellence in Applied Research and Engineering Award as part of the University of Arizona Convergence Awards. The Convergence Awards represent one of the university’s highest recognitions for interdisciplinary research and impact. research.arizona.edu/convergence-...

research.arizona.eduConvergence AwardsThrough these awards, we recognize and elevate the people whose contributions strengthen our institutional excellence and advance the university’s role as a driver of discovery and meaningful change.
Judith Su
@judithsu.bsky.social

New in Laser & Photonics Reviews: onlinelibrary.wiley.com/doi/full/10.... Free-space–coupled, frequency-locked WGM microtoroids for gas sensing. 25 ppt detection (2-CEES) 10⁷ Q preserved after polymer coating 3 orders of magnitude improvement No fiber tapers. Real-world comptabile.

onlinelibrary.wiley.comFree‐Space‐Coupled Frequency‐Locked Microtoroid Resonators With Reactive Polymer Functionalization for Part‐Per‐Trillion Gas DetectionA robust free-space-coupled FLOWER platform is demonstrated for label-free, part-per-trillion gas sensing. By integrating frequency-locked microtoroid resonators with selective polymer functionalizat...
Judith Su
@judithsu.bsky.social

Together with researchers submitting manuscripts to Optics Letters and reviewers, I look forward to advancing impactful work across these areas of optical science and engineering.

Judith Su
@judithsu.bsky.social

Many thanks to the students and collaborators who contributed to this effort, and to our sponsors, the National Institute of Mental Health (NIMH) and the National Institute on Aging (NIA), for their support.

Judith Su reposted

Optica
@optica.org

Meet the new #OpticaFellows! The Optica Board of Directors is pleased to announce that 121 members from 23 countries have been elected as Fellows for their outstanding contributions and service to Optica and the community. Find the full class: https://bit.ly/4rgXHtn

Judith Su
@judithsu.bsky.social

This issue highlights 30 of the most exciting peer-reviewed optics papers from the past year. My thoughts on optics in 2026 and beyond were also included. Many thanks to my team and sponsors (NIH and Gordon and Betty Moore Foundation) for making this possible.

Judith Su
@judithsu.bsky.social

Honored that our work on label-free optical mapping of single 5-nm quantum dots using our photothermal-based FLOWER platform was selected for inclusion in Optics & Photonics News’ Year in Optics 2025 issue. Here is the link to the original paper: www.nature.com/articles/s41...

nature.comSingle 5-nm quantum dot detection via microtoroid optical resonator photothermal microscopy - Light: Science & ApplicationsWe demonstrate ultra-sensitive photothermal microscopy with whispering gallery mode microtoroid resonators, detecting single 5 nm quantum dots with SNR > 104 and achieving a minimum heat dissipation detection of 0.75 pW, which is below that from single dye molecules.
Judith Su
@judithsu.bsky.social

Glad to share our latest article which is part of Chem. Comm' 2025 Emerging Investigators collection. The article focuses on my past and current research and puts it in perspective. I appreciate all my lab members, collaborators, and sponsors who made this possible: pubs.rsc.org/en/content/a...

pubs.rsc.orgFLOWER: A Frequency-Locked Optical Whispering Evanescent Resonator for Label-Free Molecular DetectionThe ability to detect trace amounts of biomolecules, chemicals, and environmental contaminants is critical for advancing diagnostics, drug discovery, and public health. Most high-sensitivity detection...
Judith Su
@judithsu.bsky.social

Glad to share our latest work entitled: Free-space-coupled, frequency-locked microtoroid sensor for part-per-trillion detection of mustard gas simulant. I appreciate our collaborators (Brian Stoltz and Euan McLeod) and talented associates. chemrxiv.org/engage/chemr...

chemrxiv.orgFree-space-coupled, frequency-locked microtoroid sensor for part-per-trillion detection of mustard gas simulantSulfur mustard remains a serious chemical warfare threat, but its extreme toxicity complicates sensor development. As a chemically and physically similar simulant, 2-chloroethyl ethyl sulfide (2-CEES)...
Judith Su
@judithsu.bsky.social

I'm glad to participate in this moderated panel discussion this morning at the @optica.org Sensing Congress: "Precision Versus Price-Point: Core Driver of the Sensing Domain" When: Thursday, 24 July 08:00 - 09:30 Where: International I, II, Hilton Long Beach

Judith Su
@judithsu.bsky.social

Panelists: Gilberto Brambilla, Uni of Southampton, UK Sergio Carbajo, UCLA, USA Tanya Myers, Pacific Northwest National Lab, USA Lukasz Sterczewski, Wroclaw University of Science and Technology, Poland Judith Su, UArizona, USA (joining remotely) John Williams, Boeing Research & Technology, USA

Judith Su
@judithsu.bsky.social

It was an honor to present to Winnie Ye the Robert E. Hopkins Leadership Award at @optica.org's 2025 Integrated Photonics Research conference (IPR) 2025 in Marseille. Congratulations on this wonderful achievement! #AdvancedPhotonicsCongress

Judith Su
@judithsu.bsky.social

I discuss how optical frequency combs are opening up new frontiers in biosensing, diagnostics, and environmental monitoring and how interdisciplinary collaboration is key to translating this technology into real-world tools. The article highlights our recent incubator meeting and roadmap efforts.

Judith Su
@judithsu.bsky.social

I'm optimistic that integrating state-of-the-art optical sensors and AI will revolutionize our ability to track key health biomarkers and environmental exposures, ultimately driving improvements in long-term health.

Judith Su
@judithsu.bsky.social

Getting ready for #CLEO2025 in Long Beach! I’m co-chairing the Biomedical Applications sub-committee, giving an invited talk in Environmental Sensing, and speaking at a panel on Smart Optics + AI/Quantum metrology. Excited to reconnect & catch the latest in photonics!

Judith Su
@judithsu.bsky.social

Happy to share our latest work: "Whispering gallery mode optical resonators for biological and chemical detection: current practices, future perspectives, and challenges" which is now available online in Reports on Progress in Physics. doi.org/10.1088/1361...

doi.orgWhispering gallery mode optical resonators for biological and chemical detection: current practices, future perspectives, and challenges - IOPscienceSearchWhispering gallery mode optical resonators for biological and chemical detection: current practices, future perspectives, and challenges, Shuang Hao, Judith Su

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