Light-Matter Nonlinear Interactions Laboratory

News

New Publication: "Dynamics of Dissipative Cavity Solitons in a Lattice Trap" published as an open-access article in Laser & Photonics Reviews. In this work, we introduced a generalized analytical model offering quantitative and intuitive insight into the behavior of solitons both within and beyond the locking range, predicting new phenomena, and expounding unexplained experimental observations covering bistability, hysteresis, and Arnold tongues in dual-frequency pumped microcavities. 

New Publication: Our open-access paper "4H-SiC microring opto-mechanical oscillator with a self-injection locked pump" has been published in the Special Collection on "Brillouin Scattering and Optomechanics" in APL Photonics. A fruitful collaboration with NASA's JPL (Dr. Savchenkov and Dr. Mastko) and Carnegie Mellon University (Dr. Qing Li). This is the first demonstration of a DFB diode laser self-injection-locked to a 4H-SiC microring resonator, remarkably enabling resonant opto-mechanical oscillation in the cavity modes of this quantum-friendly material platform.

SPIE Invited Talk: We gave an invited talk at the SPIE Photonics West 2024 Conference in San Francisco, CA. A recording of this talk titled "Locking range in a sideband-injection-controlled frequency comb " is now availalbe online.

Snowbird Conference Invited Talk: We presented an invited talk at the Winter Colloquium on the Physics of Quantum Electronics (PQE 2024), an invitation-only international technical gathering sometimes referred to as the Snowbird Conference. The lab PI also chaired the Time Crystals session at this conference. (Thank you NSF!)

Invited Talk in Krakow, Poland: Our lab was invited to the Time Crystals Conference in Krakow, Poland. Great conference with excellent talks by a select group of researchers actively investigating various aspects of time varying systems! (Acknowledgments are due to the Jagiellonian University in Krakow, Poland and the US National Science Foundation.)

New Visiting Student: Visiting student Thomas Heim from Ostbayerische Technische Hochschule Regensburg spends the summer of 2023 in our lab. Welcome Thomas!

SPIE Invited Talk: Our invited contribution to SPIE Photonics West 2023 proceedings is now available online: "Stable Kerr frequency combs excited in the vicinity of strong modal dispersion disruptions." Here is the link to the open-access paper. Besides analyzing the impact of dual pumping near avoided mode crossings, we reported the emergence of certain bistable branches in the power-detuning plane and discussed why such states arise in the system.

Our Work Highlighted (for the 2nd time this year) in Scientific American: Scientific American highlights our work on all-optical time crystals in an end-of-year wrap up article titled "6 Times Quantum Physics Blew Our Minds in 2022." Here is the UCR press release.

NSF Grant: Our lab wins NSF grant to develop chip-scale photonic time crystals! Here is the Inside UCR article with more details. 

Invited Feature Article: Our invited feature article on time crystals in optics has been published in Optics and Photonics News and is also available online.

New Publication: Our recent work on dissipative discrete time crystals in pump-modulated Kerr cavities is published in Nature's Communications Physics and available online.

New Article (History of Science): Our article in Slate about Harriet Brooks, a largely forgotten physics luminary, and the challenges female scientists deal with even in the modern era, is out; link.

Broad Coverage of our All-Optical Time Crystal paper: Our work on dissipative discrete time crystals in dichromatically pumped Kerr cavities has been covered broadly, including by Scientific American, Optics & Photonics News, Physics World, PHYS.ORG, MSN, Science Daily, IFL Science, and Popular Science.. 

New Publication: Our paper on dissipative discrete time crystals has been published in Nature Communications and is now available online.

Invited Talk at ICTP, Trieste, Italy: We are invited to present at the ICTP (International Center for Theoretical Physics) Conference on Time Crystals in Italy. Conference program is now available online. Information for participants can be found in this flyer

Preprint Posted: A preprint of our work on all-optical discrete time crystals is posted on arXiv.

SPIE Invited Talk: We have an invited talk at SPIE Photonics West 2021: "In search of time crystalline behavior in Kerr optical frequency combs." Conference schedule is now available online.

New Publication: Our work on coupled-mode theory for high-index-contrast photonic platforms, in collaboration with  Carnegie Mellon University, NIST, and Georgia Tech,  is published in Physical Review A. 

New Publication (Extensive Review Article): Our review paper "Emerging material systems for integrated optical Kerr frequency combs," a joint effort with the Armani Research Lab at USC, is published in Advances in Optics and Photonics, and now available on the journal website. 

New Lab Member: Dr. Anatoliy Savchenkov joins our group. Welcome Anatoliy!

Group Alumni Update: Mohammad joins ASML. Best of luck Mohammad!

New Conference Presentation: Mohammad presents group papers in the Frontiers in Optics 2019 Conference.

Recent Paper Covered in Laser Focus World: Our research on the merits of dissipative quartic solitons for WDM applications is covered in a recent article in the Laser Focus World magazine. Here is the link to the online version.

Recent Paper Highlighted by UCR: Our recent Optics Letters paper "Quartic dissipative solitons in optical Kerr cavities" is covered in a UCR article for general audience available here.

Recent publication chosen as Editor's Pick: Our recent paper "Synchronization behavior in a ternary phase model", published in the AIP journal Chaos, has been featured as the Editor's Pick. You can read the AIP press release here.

New Lab Member: Melody Asghari and Buddy Ugwumba  join our group. Welcome Melody and Buddy to UCR and our lab!

New Publication: Our paper  "Synchronization behavior in a ternary phase model" is published in the American Institute of Physics journal Chaos: An Interdisciplinary Journal of Nonlinear Science.

Recent publication chosen as Editor's Pick: Our recent publication "Quartic dissipative solitons in optical Kerr cavities", published in Optics Letters, has been highlighted by the journal as an Editor's Pick. 

New Publication: Our paper "Quartic dissipative solitons in optical Kerr cavities" is published in Optics Letters.

New Lab Member: Adil Han Dogan  joins our group from the University of Stuttgart. Welcome Adil!

Our lab presented at CLEO 2019 in San Jose, CA. The abstract titled "Gaussian Pulses in Kerr Nonlinear Microresonators with Pure Quartic Modal Dispersion" is now available online.

New Publication: "Dually-pumped Kerr microcombs for spectrally pure radio frequency signal generation and time-keeping" is now available on the SPIE Digital Library.

Our DAAD proposal was accepted. We will be hosting an intern from the University of Stuttgart. 

Our lab presented at Photonics West 2019.

We are deeply saddened to hear that Dr. Michael Gorodetsky has passed away. He was an extraordinary scientist whose seminal research was critical to the wide-spread use of high quality factor optical resonators and to establishing the field of microresonator-based optical frequency comb generation. Our thoughts and prayers are with his family and friends.

New Publication: "Phase-matched nonlinear second-harmonic generation in plasmonic metasurfaces",  our joint paper led by the Adibi group at Georgia Tech, is published in Nanophotonics De Gruyter. 

Invited Talk at Symposium on Frequcny Combs (Keio University, Japan): Our lab presented at the Keio Symposium on Microresonator Frequency Comb in Yokohama.  There were many wonderful talks from amazing researchers. Thank you Dr. Takasumi Tanabe for this wonderful program and your hospitality!

New Lab Member: Dr. Mohammadreza Ghasemkhani joins the group as a project scientist. Welcome Mohammad!

Our lab is participating in the DAAD (Deutscher Akademischer Austauschdienst) RISE Worldwide program.

We will be presenting in the SPIE 2019 Photonics West Conference in San Francisco, CA next February.

Our lab gave the opening seminar of the Fall Quarter in the ECE Department.

Our lab presented at the ECE Graduate Orientation at UCR.