Alumni Highlights

September 10, 2024

Written by Nora Berrah:

Debadarshini (Jolly) Mishra successfully defended her PhD thesis in May 2024 in Atomic, Molecular and Optical Physics. Jolly gave several presentations at national and international conferences and is the co-author of 8 publications. She is now a postdoc at Lawrence Berkeley National Lab and was hired before her thesis defense to contribute her research and learn new research techniques.

Her PhD thesis, entitled “Photo-induced ultrafast dynamics and non-linear processes in molecules” consisted at understanding the dynamics of various photo-induced physical and chemical processes in molecules, which is fundamental to physics, chemistry, and biology. The studied dynamics occur on the femtosecond time scales and are observable using ultrafast tools like ultrashort laser pulses that can be generated using our tabletop laser as well as using Free Electron Lasers (FELs) at national and international facilities as well as using an Ultrafast Electron Diffraction (UED) facility at SLAC National laboratory. Her thesis work systematically studied photo-induced processes using different laser wavelength and probing the molecular transformation using a powerful experimental technique, revealing new physics and offering insights into potential future control of the measured phenomena. Several molecules were studied such as 1 and 2-propanol, acetonitrile and C60. She used our pump-probe spectroscopy method combined with coincident Coulomb explosion imaging technique using our COLTRIMS instrument, to track and isolate the mechanisms leading to multi-body molecular dissociation. She identified, with our group members, a novel, elusive channel in acetonitrile indicative of H2/D2 roaming, published in Nature communication (Debadarshini Mishra*, Aaron C. LaForge*, Lauren M. Gorman, Sergio Diaz-Tendero, Fernando Martin, and Nora Berrah “Direct visualization of an elusive molecular reaction: Time-resolved H2 roaming in acetonitrile” (Nature communication in press). This work was supported by quantum chemistry calculations by our Madrid, Spain collaborators.

She also studied, with our group members, the energy redistribution dynamics in fullerenes irradiated with intense XUV radiation, using the FLASH FEL from Hamburg, Germany, By analyzing the kinetic energy spectra of ionic fragments from C60 molecules, we observed a transient nanoplasma state, which plays a critical role in energy redistribution within the molecule. This work not only elucidates the complex interplay between molecular and Coulombic forces in large molecules but also provides insights that are applicable to other such large molecular systems. This work was validated by theoretical calculation by the Dreden, Germany collaborators. (A. C. LaForge*, D. Mishra*, U. Saalmann, R. Obaid, S. Pathak, H. Lindenblatt, S. Meister, F. Trost, P. Rosenberger, R. Michiels, S. Biswas, K. Saraswathula, F. Stienkemeier, F. Calegari, M. Braune, M.Mudrich, M. F. Kling, D. Rolles, E. Kukk, T. Pfeifer, Jan M. Rost, R. Moshammer, and N. Berrah, “Fragmentation dynamics of fullerenes upon extreme electronic excitation near the giant resonance with XUV free-electron laser pulses” (Under review with Phys. Rev. Lett.)

Written by Daniel . Anglés-Alcázar:

As part of his Ph.D. project, Jonathan Mercedes-Feliz has made very important contributions to our understanding of the interplay between supermassive black holes and galaxies using state-of-the-art supercomputing simulations that for the first time model the propagation and impact of powerful black hole-driven winds from the very center of galaxies all the way to the intergalactic medium. Using novel data analysis approaches, Jonathan has shown that these powerful winds can simultaneously enhance the rate of formation of stars in localized regions while dramatically suppressing the global growth of massive galaxies, explaining seemingly contradictory results from recent observations and previous theoretical models. Besides excelling in research, Jonathan is deeply committed to advancing diversity, equity, and inclusion, and he has been an invaluable mentor for undergraduate and high school students from historically excluded groups as part of the McNair Scholars program, the Center for Access and Postsecondary Success (CAPS) Summer Program, and the YSSS Jack Kent Cooke Scholars program at UConn. With his published Ph.D. work already attracting significant attention in the community, Jonathan has accepted a postdoctoral research position funded by the NASA Astrophysics Theory Program to lead the next generation of simulations modeling the co-evolution of black holes and galaxies as part of Prof. Anglés-Alcázar’s group at the University of Connecticut.

2024 Physics PhDs Awarded

September 6, 2024

Bren Backhaus
Advisor: Jonathan Trump
Thesis: “Emission-Line Properties of High-Redshift Galaxies and their Black Holes”

Dharma Basaula
Advisor: Serge Nakhmanson
Thesis: “Mesoscale Modeling of Thermoelectric Materials”

Mitchell Bredice
Advisor: Vasili Kharchenko
Thesis: “Kinetics, Nucleation, and Relaxation Dynamics of Ion-Seeded Nanoparticles”

Michael Davino
Advisor: Carlos Trallero
Thesis: “Strong-field Physics from Atoms to Nanoparticles”

Ashok Gurung
Advisor: Serge Nakhmanson
Thesis: “Predictive Multiscale Modeling of Dielectric and Electromechanical Properties in Electroactive Materials”

Zachary “Zoey” Harris
Advisor: Gerald Dunne
Thesis: “On the Application of Resurgence to Effective Actions in Quantum Field Theories”

Tianye Liu
Advisor: Philip Mannheim
Thesis: “Investigation of the Anisotropy of Cosmic Microwave Background Based on Conformal Cosmological Fluctuation and Associated Legendre Functions”

Brean Maynard
Advisor: Peter Schweitzer
Thesis: “Theoretical Studies of Hadron Structure”

Jonathan Mercedes
Advisor: Daniel Angles-Alcazar
Thesis: “The Impact of Quasar Fueling and Feedback at Cosmic Noon in Cosmological Hydrodynamic Simulations”

Debadarshini Mishra
Advisor: Nora Berrah
Thesis: “Photo-Induced Ultrafast Dynamics in Molecules”

Daniel Norman
Advisor: Philip Mannheim
Thesis: “Investigation of the Analytic Structure of Conformal Cosmological Fluctuations”

Zhanna Rodnova
Advisor: Carlos Trallero
Thesis: “Towards New Mechanisms For The Generation of Long Wavelength Infrared Femtosecond Pulses”

Sebastian Seeds
Advisor: Andrew Puckett
Thesis: “The Two-Photon Exchange Contribution to Electron-Neutron Elastic Scattering (nTPE) and Extraction of GMn at Q^2 = 4.5 (GeV/c)^2 in Hall A at Jefferson National Lab”

Ravi Wickramathilake
Advisor: Vernon Cormier
Thesis: “Seismic Attenuation and Scattering in Earth’s Inner Core : New Modeling and Interpretation”

UConn Celebrates National Academies Members

August 29, 2024

Nora Berrah, Board of Trustees Distinguished Professor of Physics, speaking at the UConn National Academy of Sciences Celebration at UConn School of Law on Aug. 27, 2024. (Sean Flynn/UConn Photo)

On August 27, 2024, scholars, trustees, and friends of UConn gathered at the University of Connecticut School of Law to honor members of the university community elected to the National Academies of Sciences, Engineering, and Medicine. Established by an Act of Congress in 1863, the National Academy of Sciences was followed by the National Academy of Engineering in 1964 and the National Academy of Medicine in 1970, all under the same congressional charter. Collectively, they are known as the National Academies.

“Few honors can compare with election to a National Academy. It is a recognition by peers and the Academy itself of outstanding achievements in research and scholarship,” President Radenka Maric said at the celebration. Six UConn faculty members are elected members of the National Academies, with the most recent being Professor of Physics Nora Berrah, whose election was announced in May 2024.

For more information about the event, see the UConn Today article.

Department Head greeting

August 15, 2024

Dear Friends of UConn Physics,

Last year, I wrote to you as a new Interim Head of Physics and only barely a month into my appointment. During the past year, we conducted a search for a permanent head and I was selected. For this, I am very grateful for the trust and support I received from the department. The past year has been a bit of a rollercoaster: on the one hand, the complex budget situation has preoccupied the department heads and upper administration and student protests sparked discussions about free speech and activism on campus. On the other hand, the Physics Department had another excellent year in terms of research, teaching, and outreach and I had the pleasure of meeting several of our generous donors.

The most notable achievements of the past year were the election of Prof. Nora Berrah to the National Academy of Sciences, one of the highest honors in science, and her appointment as a UConn Board of Trustees Distinguished Professor, the highest honor at UConn. These will be celebrated at a special Edward Pollack Distinguished Lecture, on October 14, 2024, given by a longtime friend and colleague of Nora’s, Prof. Philip Bucksbaum, himself a member of the National Academy of Sciences and the Marguerite Blake Wilbur Professor in Natural Science at Stanford University.

A number of other faculty received notable awards this year. Prof. Moshe Gai will travel to Romania on a U.S. Fulbright Scholarship. Two faculty received awards from the College of Liberal Arts and Science (CLAS): Prof. Peter Schweitzer for Faculty Mentoring of Faculty and Prof. Erin Scanlon for promoting Climate, Diversity, Equity, and Inclusion. CLAS also funded a Diversity, Equity, and Inclusion Initiative: “UConn STARs (Science, Technology, and Astronomy Recruits),” Prof. Cara Battersby, PI.

We gave out our two undergraduate awards: the Katzenstein prize for the best undergraduate research paper went to Danya Alboslani and our Mark Miller award to fund a summer research project went to Leilani Ainsworth, working with Prof. Simone Colombo

We are fortunate to welcome two new faculty this year:

  • Assistant Professor Aleksandra Kuznetsova is currently a fellow at the Flatiron Institute and works on star and planet formation. She will join us this August.
  • Assistant Professor Shohini Bhattacharya currently holds an Oppenheimer Fellowship at Los Alamos National Laboratory in theoretical nuclear physics and will join us in January 2025.

This was also a great year for outreach. We welcomed over 100 enthusiastic second graders for a variety of hands-on activities, organized by Prof. Jason Hancock and Sarah Trallero. We held a viewing party for the opening of our newly renovated observatory, spearheaded by Prof. Matt Guthrie and we got permission to officially name it in honor of the late Prof. Cynthia Peterson, who funded and built the observatory in 1980. And, we had another exciting eclipse viewing party organized by Prof. Jonathan Trump – the second in seven years! We are looking forward to hosting CU*IP: Conference for Undergraduate Women and Under-represented Minorities in Physics, sponsored by the American Physical Society. It will take place in January2025 and is being organized by Prof. Nora Berrah, along with a large local organizing committee. Finally, I would like to cordially invite you to attend our 26th annual Katzenstein Distinguished Lecture on Friday, November 15, 2024, which will be held in our department. This year’s speaker is Professor Adam Riess from Johns Hopkins University where he is the Bloomberg Distinguished Professor. He was a joint winner, with Drs. Saul Perlmutter and Brian P. Schmidt, of the 2011 Nobel Prize for Physics, awarded “for the discovery of the accelerating expansion of the Universe.” I hope you can all attend and catch up on everything that is going on in the department and the Universe! I look forward to seeing you there.

Sincerely,

George Gibson
Department Head, Physics

UConn Physics Department Hosting January 2025 CU*iP.

August 14, 2024

Every year, the American Physical Society (APS) sponsors CU*IP – Conference for Undergraduate Women and Gender Minorities in Physics – at several locations around the country. This year, led by Prof. Nora Berrah, UConn Physics applied to host this national conference in Storrs and our proposal was accepted for January 24-26, 2025! The purpose of the conference is to bring together over 120 undergraduates from around the country to learn about many research areas in physics and also to lean many skills for pursuing a career in Physics or Science, such as networking, applying to graduate school, finding role models in academia or industry, learning how to succeed as an underrepresented minority, etc.

While the conference is partially funded by the APS, the host institution needs to raise a substantial amount of funds. So far, we have commitments from UConn, some generous donors, such as the Ed Eyler and Karen Greer foundation, alumnus Mark Miller, and the Del Boca family, as well as the American Association for the Advancement of Science, and Mirion Technologies.

The current members of the local organizing committee, composed of faculty, staff and students, are Cara Battersby, Tom Blum, Cameron Brady, Carrie Cichocki, Simone Colombo, Meg Davis, Elena Dormidontova, George Gibson, Matt Guthrie, Adam Kolano, Luchang Jin, Dani Lipman, Jessica Mitlehne, Michael Rozman, Dave Perry, Erin Scanlon, Peter Schweitzer, Juliette Stecenko, Sarah Trallero, Kaley Wilcox, Alan Wuosmaa and Nora Berrah.

The planned events demonstrate the Physics Department’s and UConn’s commitment to helping undergraduate women and gender minorities pursue physics following their undergraduate degree by providing them the opportunity to learn about different career tracks in STEM fields, graduate studies, and various professions in physics.

We will be very grateful to receive any donations to assist the Department in hosting the conference, which will be used to cover students’ meals, accommodation and travel, as well as the invited speakers’ and panelists’ travel and accommodation. Please visit our website at: https://physics.uconn.edu/cuwip/

In Memoriam: Lawrence “Larry” Kappers

August 8, 2024

Lawrence “Larry” Kappers, passed away on Friday, August 2, 2024. Professor Lawrence (Larry) Kappers (aka “Kap”) retired in 2009, having joined the UConn Physics Department in 1973. After receiving his Ph.D. from the University of Missouri-Columbia and completing postdoctoral appointments at the University of Minnesota and Oklahoma State University, he developed an active research program in the optical and ESR spectroscopy of color-centers in inorganic insulators. Larry later became interested in the optical properties of 3d ions at high pressure and developed a diamond-anvil cell to complete the spectroscopic measurements. He was especially proud of his service to the department as director of the Perkin-Elmer Program, which led to a Masters degree in Physics with a concentration in optics, and also his involvement with the collaborative program between the physics department and the Institute for Crystal Physics in Budapest, Hungary. Larry continued his productive research contributions with a project funded by Radiation Monitoring Devices, Inc. on the luminescent properties of scintillator materials.

For the full obituary, see https://www.wenigfh.com/obituaries/lawrence-larry-kappers.

UConn STARs visits Hartford Public High School

August 5, 2024

The UConn STARs group visited Hartford Public High School (HPHS) to teach physics for a total of eight class periods from May 6th-9th, 2024. UConn brought 16 undergraduate students from the STARs program to HPHS for our annual outreach program, during which we interacted with about 100 high school students. We collaborated with physics teacher Dr. Thomas Longyear to develop four lesson plans on topics of: 1) Phases of Matter, 2) Waves, 3) Electrostatics, and 4) Gravity over the course of the academic year. During our visit to HPHS, the STARs participants led these engaging lesson plans with hands-on demos and activities, over the course of four days. The goal of the STARs program is to improve the retention of students from Historically Excluded Groups (HEGs) in physics at UConn by addressing key factors responsible for their attrition. We have academic year events that focus on social engagement, professional development, and community building. The STARs program just concluded its 3rd year, with consistent progress and growth, and is looking forward to continued growth in our fourth year!

Pictured below are the STARs participants and the HPHS students during our May 2024 visit.

In Memoriam: Thaddeus Burch

July 30, 2024

Father Thaddeus J. Burch passed away May 14, 2024 in Wauwatosa, WI. He was 93 years old, a Jesuit for 75 years and a priest for 62 years. His life combined his deep religious faith with a quest and appreciation for the world of physics. In addition to his two bachelor’s degrees in philosophy and theology, he earned bachelor’s and master’s degrees in physics and then a PhD at Fordham University. His PhD thesis on “A Nuclear Resonance Study of Order-Disorder in Ferromagnetic Alloys” was completed in 1968 under the direction of Professor Joseph Budnick. In 1974, Joe left Fordham to become the department chair in physics at the University of Connecticut and Thaddeus joined him as a visiting professor and a member of the Institute of Materials Sciences from 1974 to 1976. The research they completed together over the years led to 41 peer-reviewed journal articles that used NMR to probe ferromagnetic materials. Father Burch later joined Marquette University and was a professor of physics, physics department chair, and dean of the graduate school. Professor Budnick remembers Father Burch as “a dedicated and gifted student at Fordham and a creative and interactive researcher in the lab. He was a genuinely wonderful person in every way.”

Prof. Moshe Gai Awarded 2024-2025 Fulbright U.S. Scholar Award

July 16, 2024


Professor Moshe Gai, the director of the Laboratory for Nuclear Science, aka the Astrophysics Laboratory, https://astro.uconn.edu, was awarded a 2024-2025 Fulbright US Scholar Award to teach and do research in Romania. He will spend five months at the newly constructed world highest power laser lab (10 PW), the Extreme Light Infrastructure Nuclear Physics (ELI-NP), recently constructed by the EU in Bucharest, where Prof. Gai plans to apply expertise he gained working at Duke University for using Time Projection Chamber (TPC) detectors with gamma-beams to study stellar process in the lab.

Nobel Prize Winner, Professor Adam Riess, Katzenstein Distinguished Lecturer

July 2, 2024

The University of Connecticut, Department of Physics is proud to announce the 26th Annual Katzenstein Distinguished Lecturer that will be on Friday, November 15th. For the details of the lecture see the Web Calendar post.

Adam Riess is a Bloomberg Distinguished Professor, the Thomas J. Barber Professor in Space Studies at the Krieger School of Arts and Sciences at Johns Hopkins University, a distinguished astronomer at the Space Telescope Science Institute and a member of the National Academy of Sciences. He received his bachelor’s degree in physics from the Massachusetts Institute of Technology in 1992 and his PhD from Harvard University in 1996. His research involves measurements of the cosmological framework with supernovae (exploding stars) and Cepheids (pulsating stars). Currently, he leads the SHOES Team in efforts to improve the measurement of the Hubble Constant and the Higher-z Team to find and measure the most distant type Ia supernovae known to probe the origin of cosmic acceleration.

In 2011, he was named a co-winner of the Nobel Prize in Physics and was awarded the Albert Einstein Medal for his leadership in the High-z Supernova Search Team’s discovery that the expansion rate of the universe is accelerating, a phenomenon widely attributed to a mysterious, unexplained “dark energy” filling the universe. The discovery was named by Science magazine in 1998 as “the Breakthrough Discovery of the Year.” His accomplishments have been recognized with a number of other awards, including a MacArthur Fellowship in 2008, the Gruber Foundation Cosmology Prize in 2007 (shared), and the Shaw Prize in Astronomy in 2006.