*** WELCOME TO THE UCSB EXOPLANET POLARIMETRY LAB HOMEPAGE ***Last updated: Oct 6, 2026NEWS · 2026-10-02: Recruiting a new graduate studentNEWS · 2026-10-02: Onward and upwardNEWS · 2026-08-25: First-light paper for the NIRC2 polarimeterNEWS · 2026-08-19: Dr. Rebecca ZhangNEWS · 2026-04-15: Postdoc Position at UC BerkeleyPlease sign our guestbook before you leave!Best viewed in Netscape Navigator 4.0 at 800x600 *** WELCOME TO THE UCSB EXOPLANET POLARIMETRY LAB HOMEPAGE ***Last updated: Oct 6, 2026NEWS · 2026-10-02: Recruiting a new graduate studentNEWS · 2026-10-02: Onward and upwardNEWS · 2026-08-25: First-light paper for the NIRC2 polarimeterNEWS · 2026-08-19: Dr. Rebecca ZhangNEWS · 2026-04-15: Postdoc Position at UC BerkeleyPlease sign our guestbook before you leave!Best viewed in Netscape Navigator 4.0 at 800x600

Millar-Blanchaer
Research Group

University of California, Santa Barbara

EXOPLANETS · POLARIMETRY · HIGH-CONTRAST IMAGING

MEET THE GROUP~/group

The UCSB Exoplanet Polarimetry Lab: postdocs, graduate students and undergraduates working on instrumentation, observations and data analysis. Interested in joining? E-mail me. RECRUITING NEW GRADS

The research group at the 2026 Spirit of Lyot Conference
A good showing of the research group at the 2026 Spirit of Lyot Conference in Pasadena.

CURRENT GROUP MEMBERS

NO PHOTO
(YET)

Connor Vancil

Graduate Student

Connor's research is broadly focused on investigating exoplanets, brown dwarfs, and their atmospheres. More specifically, he thinks about how high resolution spectroscopy and polarimetry can be leveraged for atmospheric characterization.

Skyler Palatnick

Skyler Palatnick

Graduate Student

Skyler's research focuses on design, fabrication, and characterization of metasurface optics for high-contrast imaging, as well as usng current instrumentation for exoplanet and debris disk detection and characterization.

Ronald Lopez

Ronald Lopez

NSF Astronomy and Astrophysics Postdoctoral Fellow

Ronald is interested in astronomical instrumentation and the discovery and characterization of directly imaged exoplanets. He is currently working on the commissioning plan for the updated polarimetry mode on the upcoming GPI 2.0 instrument and developing an MKID high-resolution multi-object spectrograph testbed for exoplanet characterization. He is also passionate about taking steps towards a more diverse, equitable, and inclusive environment in physics and astronomy.

Briley Lewis

Briley Lewis

NSF Astronomy and Astrophysics Postdoctoral Fellow

Briley is interested in high-contrast + polarimetric instrumentation/data processing and observations of debris disks. She is currently working on commissioning the NIRC2 polarimetry mode and completing a uniform analysis of the Gemini Planet Imager debris disk sample using GPU-enabled modeling. She is also passionate about teaching, science writing, and accessibility in astronomy.

Ryan Hersey

Ryan Hersey

Graduate Student

Ryan is a 2nd year graduate student interested in developing metasurface optics for high contrast imaging.

NO PHOTO
(YET)

Mihir Kondapalli

Undergraduate Student

Mihir's research focuses on developing GPU enabled modeling techniques for debris disk and JWST forward modeling.

NO PHOTO
(YET)

Eric Shen

Undergraduate Student

Eric is a third year undergraduate student currently working on developing simulations and the data reduction pipeline for the Roman Coronagraph instrument. More broadly, he is interested in instrumentation for astronomy and high-contrast imaging.

Thomas McIntosh

Thomas McIntosh

Undergraduate Student

Thomas is a sophomore physics major interested in high contrast imaging instrumentation and observation. He is currently working on a Mueller matrix model for the Subaru/SCExAO/CHARIS spectropolarimetric mode that characterizes how the optical path polarizes incoming starlight and an accompanying open source Mueller matrix modeling package.

Sarah Choi

Sarah Choi

Undergraduate Student

Sarah is a CCS Physics student at UCSB interested in images, optics, and exoplanets. She is currently working on a visible-light polarimeter that will help understand how devices change one polarization state into another.

Ivan Bijamov

Ivan Bijamov

Undergraduate Student

Ivan is an undergraduate at Connecticut College interested in debris disks, high-contrast imaging, and exoplanet detection. He is currently modeling JWST/NIRCam observations of the HD 30447 debris disk to characterize its morphology and search for planetary companions.

GROUP ALUMNI~/group/alumni

Rebecca Zhang

Rebecca Zhang

Former Graduate Student

Rebecca's research focuses on characterizing the instrumental polarization of SCExAO VAMPIRES and developing new polarimetry techniques for exoplanet characterization.

Now: Postdoctoral Scholar at UC Berkeley

NO PHOTO
(YET)

Jaren N. Ashcraft (He/They)

Former NASA Hubble Fellow

Jaren conducts research at the intersection of optical instrumentation and direct exoplanet detection. Jaren has lead efforts to characterize NASA's Habitable Worlds Observatory's polarization aberrations, advance calibration of Mueller polarimeters, and design coronagraph masks for space-based ultraviolet exoplanet characterization.

Now: Optical Engineer III, NASA Jet Propulsion Laboratory

NO PHOTO
(YET)

Andy Zhou

Former Undergraduate Student

Andy’s research focuses on high-contrast imaging. His current work is on focal-plane wavefront sensing, developing regularized Speckle Area Nulling (SAN) method to suppress quasi-static speckles that can mimic planets.

Now: Graduate Student, James C. Wyant College of Optical Sciences, University of Arizona

NO PHOTO
(YET)

Jack Grossman

Former Undergraduate Student

Jack worked on high-contrast imaging techniques and data analysis.

Now: Graduate Student at Michigan Tech

NO PHOTO
(YET)

William Chang

Former Undergraduate Student

William's research focused on polarimetry and instrumentation development.

Now: Graduate Student at Yale

NO PHOTO
(YET)

Ivan Abreu

Former REU Student

Ivan worked on exoplanet detection and characterization.

NO PHOTO
(YET)

Kyle Lam

Former Undergraduate Student

Kyle's research focused on brown dwarf atmospheres and polarimetry.

NO PHOTO
(YET)

Sofia Hillman

Former Undergraduate Student

Sofia is working on characterizing optics for a new polarimetry mode at the Keck II telescope.

Now: Graduate Student at University of Arizona

Will Melby

Will Melby

Former UCSB Undergraduate Student

Will is a physics undergraduate interested in exoplanets and instrumentation. His research focuses on characterizing optics for a new polarimetry mode at the Keck II telescope.

Now: Graduate Student at University of Arizona

Maya (Ye) Ma

Maya (Ye) Ma

Undergraduate Student

Maya is a sophomore physics and computer science dual major. She is currently working on developing metasurface for direct imaging, focusing on fabrication at the UCSB Nanofab and optimizing the design of metasurface.

Yunxuan (Lucy) Jiang

Yunxuan (Lucy) Jiang

Former UCSB Undergraduate Student

Yunxuan is a senior data science major. Her work is dedicated to the Gemini Planet Imager (GPI) data pipeline extraction, with a special focus on optimizing the efficiency and accuracy of ePSF model extraction. She is interested in data modeling and optimization within the realms of astronomy and finance.