Speakers

 

Speakers’ bios and abstracts below appear in order of their presentation according to the agenda. 

Workshop Presenters

Five-Minute Rapid Fire Presenters

Lab Tours

Poster Presenters

---

.

Workshop Presenters

_

Keynote Speaker
Cat Merrill

Title: 
Risky Business: A discussion of development paradigms for space programs

Bio:
Mrs. Merrill has over 20 years of experience in the optical field both in the private and public spheres. She currently serves as the Director of Space Telescope Programs for Steward Observatory at The University of Arizona. Prior to this, Cat was an owner and CFO at Ruda Optical, has worked at NOAO, managed the GMT Primary Mirror Segments at Steward Observatory and served as the Deputy PM and Lead Engineer for OCAMS on the OSIRIS-Rex mission. Cat started her career at Raytheon Missile Systems where she worked on the EKV and SM-3 sensor and seeker teams as well as in the Discrimination Product Center. Mrs. Merrill is originally from Racine Wisconsin. She received a B.S in Physics from NAU and earned her M.S. in Optics from UA in 2005. She studied under Dr. Kurt Thome and did her research on image processing and vicarious calibration techniques. Mrs. Merrill’s working legacy is a history of educational philanthropic efforts including work with MESA, JobPath, OSIRIS-Rex Ambassadors, Women United, Girl Scouts, and as part of the Women United Global Leadership Council.

_

Yuzuru Takashima, Professor of Optical Sciences 

Title:
Beam and Image Steering with MEMS-SLMs for Display, LiDAR, Communication, and Beyond

Abstract:
We overview emerging applications employing beam and image steering with Micro Electro Mechanical System (MEMS) based Spatial Light Modulators (SLMs).

Bio:
Dr. Yuzuru Takashima is a tenured full professor at James C. Wyant College of Optical Sciences of University of Arizona. His research focus is MEMS-based lidar for automotives and AR near to eye displays, as well as optical design and metrology of space optics. Prior to joining the University of Arizona, he was a research staff at Stanford University where he conducted research and development of high-density holographic data storage systems and nano-photonic electron beam generators. He was employed as an optical engineer at Toshiba Corporation in Japan and developed ultra-precision manufacturing process for optical components. He is a fellow of SPIE and senior member of OPTICA. He serves as a general co-chair of SPIE Industrial Optical Systems and Devices (iODS), and 2026 OPTICA 3D conference. He received B.S. in Physics from Kyoto University in Japan and M.S. and Ph.D. in Electrical Engineering from Stanford University. 

_

Yeran Bai, Assistant Professor of Optical Sciences

Title: 
Uncovering single cell function with mid infrared photothermal microscopy

Abstract:
Understanding biology and disease requires imaging molecular and metabolic details, yet most methods rely on labels or lack chemical specificity. Mid-infrared photothermal microscopy directly detects molecular vibrations, enabling label-free chemical imaging with submicrometer resolution. I will introduce its principles, recent advances in speed and selectivity, and applications in single-cell metabolism and antimicrobial responses.

Bio:
Yeran Bai is an Assistant Professor at the Wyant College of Optical Sciences at the University of Arizona, where she joined the faculty in 2025. She received her B.S. in 2013 from Huazhong University of Science and Technology and her Ph.D. in 2019 from the University of Chinese Academy of Sciences. Her research advances mid-infrared photothermal microscopy and related optical imaging technologies to probe cellular metabolism with chemical specificity and single-cell resolution. She focuses on uncovering metabolic heterogeneity and disease mechanisms by integrating optical engineering, vibrational spectroscopy, and biomedical applications to create next-generation tools for understanding complex biological systems.

_

Cristian Panda, Assistant Professor of Optical Sciences

 

Title:
Quantum Metrology and Sensing using Atoms and Molecules

Abstract: 
Exceptional levels of quantum control and coherence are necessary for performing quantum metrology and sensing with the utmost precision. Atom interferometers are powerful in both probing fundamental physics and everyday sensing, with results that range from the measurement of fundamental constants and tests of general relativity to the quantum sensing of gravity and inertial effects in the field for geophysical, defense and industrial applications. However, the use of atoms in free fall has so far limited their measurement times to a few seconds.

Bio: 
Cristian Panda is an Assistant Professor at the Wyant College of Optical Sciences (OSC) at the University of Arizona. He received his undergraduate degree in Physics from Reed College with his thesis titled “The role of delay in the isochronal chaos synchronization of delay-coupled opto-electronic oscillators”. He then earned his A.M. and Ph.D. at Harvard University searching for physics beyond the Standard Model as part of the ACME experiment, where he measured the electron’s electric dipole moment with record precision enabled by the huge electric field available in the thorium monoxide molecule. From 2019 to 2024, he was a postdoctoral scholar at the University of California Berkeley, where he developed an interferometer with atoms held against Earth’s gravity by an optical lattice. This device was able to achieve quantum coherence beyond the minute scale and record sensitivity to measuring exotic dark energy candidate fields. Dr. Panda is an APS DAMOP Deborah Jin Thesis Prize Finalist, 2021, and has received the Purcell Fellowship, Harvard University, 2012-2013. He has authored over 20 peer-reviewed publications in journals such as Nature, Science, Physical Review, Applied Physics Letters, Journal of Physics and others. His community involvement includes multiple organization memberships, acting as a reviewer for a wide range of academic journals, as well as mentoring and teaching students outside of the classroom at all levels, including undergraduate, high school and middle school.

_

Mark Spencer, Robert M. Edmund Endowed Chair in Optical Sciences, Professor of Optical Sciences

Title:
High Energy Laser Perspectives from a Former Government Leader and Current Academic Researcher

Abstract:
Since 2019, the Military Services have developed several high energy laser (HEL) prototype systems in support of the near- and mid-term goals of the Department of War Directed Energy Roadmap. Currently, the most sophisticated prototypes under development are the HEL Counter Anti-ship-cruise-missile Program (HELCAP) being funded by the Office of Naval Research and the Indirect Fire Protection Capability HEL (IFPC-HEL) being funded by the U.S. Army’s Rapid Capabilities and Critical Technologies Office. Both prototypes are scheduled for field demos in FY26 in support of Golden Dome for America. Based on lessons learned from HELCAP and IFPC-HEL, one significant challenge that remains for future prototype systems is the timely integration of continuous-wave HEL sources at >100 kW-class power levels. A lot of these integration challenges can be overcome with enough time and funding; however, they can also be overcome with innovation. Either option will require an experienced workforce, and that is the point of this talk—to start a discussion on how the University of Arizona can help our industrial affiliates with respect to this cause.

Bio:
Mark F. Spencer is a Professor of Optical Sciences and the inaugural holder of the Robert M. Edmund Endowed Chair in Optical Sciences within the James C. Wyant College of Optical Sciences at the University of Arizona. At large, he is a scientist/engineer who has spent his career working in various technical and administrative capacities. Mark began his career at the Air Force Research Laboratory, Directed Energy Directorate (2014-2021) after receiving his PhD from the Air Force Institute of Technology as a SMART Scholar. Before taking his current role in academia, he served as a Directed Energy Staff Specialist at Headquarters US Indo-Pacific Command (2021-2023), as well as Director of the Joint Directed Energy Transition Office and Principal Director (Senior Official) for Directed Energy within the Office of the Under Secretary of Defense for Research and Engineering at the Pentagon (2023-2025). Mark is an internationally recognized expert in directed energy (specifically, beam control and propagation for laser systems) and currently conducts research in unconventional imaging, sensing, and adaptive optics for defense and commercial applications. He is a Senior Member of Optica and a Fellow of SPIE.

_

Laura Sawyer, PhD Student

Title: 
Exploring photocatalytic mechanisms via ultrafast time-resolved spectroscopy

Abstract: 
Photoredox catalysis has found widespread application in green chemistry, drug discovery and the production of industrially relevant chemicals. The field of photocatalysis includes a wide range of potential activation pathways in which the absorption of light brings the catalyst into an excited state to drive the catalytic process. Light-driven reactions offer the advantage of employing less reactive/low-energy reagents, unveiling previously elusive or unknown mechanistic pathways and positively influencing industrial production. Indirect methods, such as redox potential measurements, bond dissociation energies and spectroelectrochemistry, fall short in revealing comprehensive information about intermediates involved in catalytic processes. Optical ultrafast time-resolved techniques can be used to track processes central to photoredox catalysis, such as charge transfer, intersystem crossing, and internal conversion. Using time correlated single photon counting, transient absorption spectroscopy, and two-dimensional electronic spectroscopy, we can map the mechanisms of the photoredox catalysis, including the effects of excited state radicals, dimerization, and temperature in photoredox catalysis cycles.

Bio:
Laura Sawyer is a 6th year PhD candidate in the Ultrafast Nonlinear Spectroscopy group. Her current research focuses on Rhodamine 6G and its’ application in photoredox catalysis.

_

Clarissa DeLeon, PhD Student 

Title:
Relating Atmospheric Turbidity to Sky Neutral Point Location

Abstract: 
The Polarization Lab has developed the Ultraviolet Linear Stokes Imaging Polarimeter, a ground-based instrument that scans the sky to measure polarized light in the atmosphere. The focus of this work is tracking the location of the sky polarization neutral points, regions where light is randomly polarized due to multiple scattering in the atmosphere. The locations of the neutral points change with observation wavelength, diurnal and seasonal variations of the location of the Sun, and atmospheric turbidity. By performing longitudinal observations of the sky neutral point locations, this research explores the utility of monitoring perturbations in the diurnal trajectory of the sky polarization neutral points as indicators of changes in atmospheric turbidity. This talk will provide an overview of the project and showcase results from a summer field deployment in Bozeman, Montana.

Bio:
Clarissa earned her B.S. in Electrical Engineering with a minor in Optics and Photonics from Montana State University before starting her PhD at the University of Arizona. She currently works on the Ultraviolet Linear Stokes Imaging Polarimeter (ULTRASIP) project in the Polarization Lab. A proud Latina, Clarissa aspires to become a professor and advocate for Latinx representation in STEM. Her research interests focus on advancing optical techniques for environmental monitoring. Outside of academia, she enjoys crocheting, hiking, and reading.

---

.

Five-Minute Rapid Fire Presenters

_

James Taylor, PhD Student

Title:
Fast 3D Metrology for 360degree in-situ monitoring during additive manufacturing

Abstract: 
Directed Energy Deposition (DED) is a metal additive manufacturing process capable of building and repairing large, complex metal parts from a wide range of alloys. Its flexibility makes it attractive for applications in the aerospace, automotive, and biomedical industries. However, defects introduced during printing can, if not detected, significantly affect the final result and render a part unusable. Effective in situ correction methods require fast, high-resolution, three-dimensional inspection inside the machine, yet existing techniques often lack full surface coverage, require bulky hardware, or operate too slowly for layer-wise feedback.  In this talk, we present a fast, multi-view, polarized fringe projection profilometry (FPP) system for real-time, three-dimensional inspection during DED printing. Multiple camera–projector pairs are arranged around the deposition surface to capture single-shot measurements from different viewing directions, while specular reflections from the metallic surfaces are suppressed by cross-polarization filtering. The final 360° reconstruction is obtained by jointly registering the multi-view measurements. Our prototype, integrated inside a functional DED system, achieves depth precision better than 50 micrometers on reflective metal surfaces, enabling accurate layer-wise monitoring for closed-loop DED process control.

Bio:
James Taylor is a PhD student in the Wyant College of Optical Sciences at the University of Arizona. Before joining the 3DIM lab, he worked at 4D Technology, where he primarily contributed to the development of a dual-wavelength interferometry system for surface roughness testing. Prior to that, he earned bachelor’s degrees in Physics and Economics from Vanderbilt University in 2021. His current research focuses on exploring the fundamental limits of 3D measurement techniques and the trade-offs between them, particularly for applications in industrial inspection and automation.

_

Hill Tailor, PhD Student

Title: 
Fabrication of Wedged Glass Spacers for Segmented X-ray Mirror Assemblies using HF Etching

Abstract:
Future flagship X-ray astronomy missions require mirror assemblies that combine sub-arcsecond half-power diameter (HPD) performance with low mass to achieve large effective area. This is enabled by grazing-incidence optics composed of thin, precisely aligned nested mirror shells. In prototype mirror modules, glass spacers are used to bond and structurally integrate these shells. Because each shell is tilted relative to the optical axis, the spacers must incorporate a precisely controlled wedge profile to match the shell geometry. We developed a hydrofluoric acid (HF) etching process to fabricate wedged glass spacers for 157 mm-radius shells. Each spacer is suspended from a PTFE holder on a linear motion stage and etched in two cycles within a graduated cylinder. The first cycle establishes a uniform thickness and etch rate, while the second creates the wedge through controlled immersion. Spacer thickness is measured using a chromatic confocal sensor before and after each cycle. The resulting spacers show residuals within ±2 µm of an ideal planar wedge, meeting alignment requirements for mirror module integration.

Bio:
Hill Tailor is a fourth year PhD student in the College of Optical Sciences at the University of Arizona. He earned his bachelor’s degree in Applied Physics from the University of Arizona in May 2022 and is currently a member of the Lightweight Optics Lab (LOL) led by Dr. Brandon Chalifoux. His research focuses on advancing fabrication and metrology techniques to improve the accuracy of optomechanical support structures used for aligning lightweight, grazing-incidence X-ray mirror modules.

_

John Bass, PhD Student

Title:
Holographic Light Field Modulation Beyond the Current Limitations of Phase Light Modulators

Abstract: 
Phase Light Modulators (PLMs) are a new class of devices capable of directly modulating the phase of light at high resolution and speed without relying on polarization. However, they currently suffer from limited bit depths of 4–5 bits, which introduces quantization noise and restricts their use in holographic projection and display, as well as in adaptive optics applications. In this talk, we introduce a novel four-phase encoding method that significantly expands the effective bit depth of PLMs while simultaneously enabling the modulation of longer wavelengths beyond the wavelength limits of current PLM devices.

Bio:
John Bass is a 4th Year Ph.D. Candidate in Prof. Florian Willomitzer’s Computational 3D Imaging and Measurement Lab. His research focuses on computational field modulation beyond conventional limits, to improve the performance of communications systems, imaging devices, manufacturing hardware, and holographic displays.

_

Jiabin Chen, PhD Student

Title:

Deep Ultraviolet Microscopy for Stain-Free Tissue Imaging and Cytology Diagnostics

Abstract:
Deep ultraviolet (DUV) microscopy enables stain-free tissue and cellular imaging by exploiting the intrinsic absorption of nuclei. The shorter wavelengths provide higher spatial resolution, while the shallow penetration depth enables thin optical sectioning. I will present several DUV microscopy systems designed for label-free cytology and tissue diagnostics, which deliver high-contrast visualization of nuclei and fibrous structures without chemical staining. These results demonstrate the potential of DUV microscopy as a rapid, stain-free alternative to conventional histopathology workflows.

Bio:
Jiabin Chen is a PhD candidate in Optical Science at the University of Arizona, working in Prof. Rongguang Liang’s group. His research focuses on optical system design and microscopy imaging , with an emphasis on deep ultraviolet, multiphoton, and confocal imaging for stain-free biomedical diagnostics. He has extensive experience building and aligning advanced microscopy systems and translating optical innovations toward cytology and cancer screening applications. 

_

Patrick Cornwall, PhD Student

Title:
Towards Assessment of Deep Skin Lesions Using Synthetic Waves

Abstract:
Imaging and assessing deep skin lesions remains a significant challenge in dermatology, particularly for non-melanoma skin cancer, where weak absorption contrast and strong optical scattering limit sensitivity to deeper structures. To address these challenges, we propose the use of synthetic wavelength imaging (SWI), a computational imaging technique that combines optical fields acquired at closely spaced wavelengths to form a complex field at a longer, computational “synthetic” wavelength. This synthetic field is more robust to scattering while retaining contrast from the underlying optical carrier wavelengths. In this talk, we present initial considerations and experimental results toward the application of SWI for deep skin lesion assessment, leveraging its favorable properties to enable depth-resolved measurements through tissue beyond the capabilities of conventional approaches.

Bio:
Patrick Cornwall is a PhD student at the Wyant College of Optical Sciences, University of Arizona, working under Prof. Florian Willomitzer. His research focuses on computational imaging through scattering media, fibers, and free space using synthetic wavelength and multispectral interferometric techniques. He contributes to the development of synthetic wavelength imaging (SWI) and synthetic light-in-flight (SLiF) methods that enable wide-field, real-time imaging through dynamic and volumetric scatterers. His current work demonstrates imaging through biological tissue and volumetric phantoms, showing potential applications in deep tissue imaging and other biomedical contexts. He is especially interested in expanding SWI to single-shot acquisition for robust imaging in real-world conditions.

_

Lily McKenna, PhD Student

Title: 
Rapid infrared Mueller polarimetry for in vivo eye imaging

Abstract: 
The cornea of the human eye is an anisotropic material that exhibits polarization-dependent refraction, known as birefringence. Mueller matrix polarimetry measures the birefringence and other polarization effects of the cornea by capturing a series of images. A limitation of time-modulated polarimeters is the temporal resolution of the measurement. A potential method to increase the speed of a polarimeter is by incorporating prior knowledge of the sample to decrease the number of unknown parameters in the Mueller matrix reconstruction.

Bio:
Lily McKenna is a third-year PhD student and an NSF Graduate Research Fellow working in the Polarization Lab with Prof. Meredith Kupinski, where they study polarization imaging for computer vision applications. They are especially interested in developing imaging systems for industrial or biomedical applications, as well as for monitoring climate and environmental systems.

_

Atkin Hyatt, PhD Student

Title:
Optomechanics with Ultralow Loss Torsional Nanoresonators

Abstract:
From early tests of gravity and electrostatics to the first observation of radiation pressure, torsion oscillators have played an instrumental role in the advancement of modern physics. Their exceptionally low dissipation and resilience to environmental noise make them especially attractive as weak force sensors for both table-top and nanoscale experiments. In torsional optomechanics, rotational motion is transduced optically through its coupling to the spatial structure of a probing laser beam. In this talk, I provide an overview of torsional optomechanics focusing on the design of ultralow loss nanomechanical oscillators, the unique optomechanical coupling to spatial modes, and making quantum-limited measurements with an optical lever. Finally, I discuss the use of active feedback to laser-cool these devices to millikelvin temperatures.

Bio:
Atkin Hyatt is a third-year PhD student at the Wyant College of Optical Sciences, where he specializes in experimental optical physics. His research explores how optomechanics can enable fundamental physics experiments and precision metrology. He focuses on how light can measure and control the motion of nanomechanical torsion oscillators, with applications ranging from tests of quantum gravity, searches for dark matter, and ultra-precise sensors.

_

Alana Gonzales, PhD Student 

 

Title:
An Accessory Endoscope for Performing Optical Coherence Tomography and Elastography for Early Stomach Cancer Detection

Abstract: 
Changes in tissue architecture and increased tissue stiffness are characteristic of stomach cancer, and we have demonstrated the use of optical coherence tomography (OCT) and elastography (OCE) to visualize these changes in ex vivo samples of human stomach tissue. This work now aims to devise a miniature accessory endoscope for performing OCT and OCE in patients to improve sensitivity of stomach cancer screening, especially at early stages of disease.

Bio:
Alana G. Gonzales is an Optical Sciences PhD student at the University of Arizona. She is a member of the Tissue Optics Lab led by Dr. Jennifer Barton. She earned a B.A. in Engineering from Scripps College, a B.S. in Biomedical Engineering from the University of Arizona, and an M.S. in Biomedical Engineering from Duke University. Her research interests include endoscopic optical coherence tomography (OCT), optical coherence elastography (OCE), and early detection of cancer.

---

.

Lab Tours

Image Science 

Faculty: Yeran Bai
Biomedical Applied Imaing Lab
Meinel 672 & 678
Presenter: Aileen Zhang

Faculty: David Brady
High resolution color imaging
GCRB 275
Presenter: Adel Al-Ghazwi

Faculty: Florian Willomitzer
Structured Light 3D Imaging for Industrial Inspection, Medical Imaging, and AR/VR
GCRB 255
Presenters: Jiazhang Wang, James Taylor, Tianyi Wang

Faculty: Florian Willomitzer
Synthetic Wavelength Imaging and Holographic Wavefront Shaping & Sensing
GCRB 260
Presenters: Muralidhar Madabhushi, John Bass, Patrick Cornwall

Faculty: Dongkyun Kang
Translational Optical Imaging Lab
GCRB 321
Presenters: Kenneth Marcelino, Momoka Sugimura

Faculty: Leilei Peng
Fluorescence microscopy
Meinel 616
Presenter: Leilei Peng

Faculty: Meredith Kupinski 
Polarimetry in Remote Sensing
Meinel 767
Presenter: Meredith Kupinski 

Faculty: Meredith Kupinski 
Applications of Imaging Polarimeters
Meinel 765
Presenter: Jeremy Parkinson

Faculty: Meredith Kupinski
Polarimeter in the LWIR
Meinel 467
Presenter: TBD

Faculty: Amit Ashok
I2SL (Optical Super-resolution/Chronography/Wavefront Sensing)
GCRB 315, 317
Presenters: Caleb Cook, Jacob Trzaska

Optical Engineering

Faculty: Yuzuru Takashima
Takashima Advanced Lidar and Display Lab
GCRB 225, 235
Presenters: Chuan Lup, Tianyao Zhang, Yexin Pei, Zhouxiangru Yu, Yiran Xie, Shriniketh Nick Sreevatsan, Avion Lowery, Abrar Fahim Liaf, Keaton Shurilla, Nathan Queen

Faculty: Jennifer Barton
Tissue Optics Lab
BSRL 160
Presenter: Jennifer Barton

Faculty: Ronald Driggers
Drone and Degraded Visual Environment Lab
Meinel 453
Presenters: Jordan Rubis, Amy Hermann

Faculty: Ronald Driggers
Active Imaging Lab
GCRB 213
Presenters: David Bloom Joshua Teague

Faculty: Ronald Driggers
Pilotage Lab
GCRB 215
Presenter: Chance Lawrence

Faculty: Jeff Czapla-Myers
Bi-directional reflectance measurement live demo
Meinel 653
Presenter: Nik Anderson

Faculty: Jose Sasian
Student optical fabrication
Meinel 440
Presenter: Jose Sasian

Faculty: Felipe Guzman
LASSO
GCRB 055
Presenter: Felipe Guzman

Faculty: Felipe Guzman
LASSO
GCRB 050
Presenter: Felipe Guzman

Faculty: Felipe Guzman
LASSO
GCRB 045
Presenter: Felipe Guzman

Optical Physics 

Faculty: Cristian Panda
Quantum Sensing and Metrology
Meinel 106 G
Presenter: Cristian Panda 

Faculty: Dalziel Wilson
Quantum Optomechanics Lab
GCRB 060, 065, 070
Presenters: Morgan Choi, Charles Condos, Atkin Hyatt

Faculty: Jason Jones
Spectroscopy of gases and plasmas
Meinel 656
Presenters: Kelby Todd, Charlie Chisholm, Liam Frank

Photonics 

Faculty: Xiushan Zhi
Single-frequency Fiber Lasers
Meinel 229 
Presenter: Khawkah AlYahyaei

Faculty: Khanh Kieu
Ultrafast fiber lasers and multiphoton microscopy
Meinel 662
Presenter: Lam Nguyen

Faculty: Robert Norwood
Photonic Integrated Circuit Test Lab
Meinel 207
Presenter: Dr. Kyung-Jo Kim

Faculty: Robert Norwood
Photonics Materials and Devices Lab
Meinel 506/506A
Presenter: Matthew Malaker

Faculty: Viktor Dubrovin
Specialty Optical Glass Lab
Meinel 553
Presenter: Viktor Dubrovin

top