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Pioneering New Frontiers in Topological Physics

04-28-22

A team of engineers led by Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, recently opened a new frontier in topological physics, which is the field that seeks to understand the topological properties that arise in coupled systems based on how they are organized and coupled. [Caltech story]

Tags: APhMS EE research highlights Alireza Marandi James Williams Midya Parto

A New Soliton Offers a Path Toward Compact Molecular Sensing

04-11-22

Scientists know that molecules in our exhaled breath can reveal a vast amount of medical information; for example, sensors to precisely measure minute changes in the concentrations of different vapors in breath may one day replace the standard blood test.” However, no technology is yet available to access this data from exhaled breath in a timely, affordable way. A new process for generating self-reinforcing wave pulses, also known as solitons, may pave the way toward bringing optical molecular sensing out of the lab and into medical devices with a compact footprint. 

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Tags: EE Alireza Marandi Rajveer Nehra Saman Jahani Luis Ledezma Arkadev Roy

New Caltech Center for Sensing to Intelligence (S2I) Launches Collaboration with Industry Partner

12-02-21

The Caltech Center for Sensing to Intelligence (S2I) has announced that, in collaboration with Rockley Photonics, a photonics-based health monitoring and communications solutions company, it will allocate $1.5 million in research grants over the next three years to jumpstart efforts to combine sensors with artificial intelligence. "We would like to have sensors in every device these days, generating a huge amount of data," says Azita Emami, Andrew and Peggy Cherng Professor of Electrical Engineering and Medical Engineering and the director of S2I. "But it's difficult to extract the most important information from the mountains of data they create." [Caltech story]

Tags: APhMS EE Changhuei Yang MedE CMS Azita Emami CNS Animashree Anandkumar Alireza Marandi Katie Bouman

New Insight into Nonlinear Optical Resonators Unlocks Door to Numerous Potential Applications

02-25-21

Devices known as optical parametric oscillators are among the widely used nonlinear resonators in optics; they are "nonlinear" in that there is light flowing into the system and light leaking out, but not at the same wavelengths. Though these oscillators are useful in a variety of applications, including in quantum optics experiments, the physics that underpins how their output wavelength, or spectrum, behaves is not well understood. "When you add strong nonlinearity to resonators, you enter what we call a 'rich physics regime,'" says Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics. "'Rich' in physics terms usually means complicated and hard to use, but we need nonlinearities to create useful functionalities such as switching for computing." To be able to make full use of nonlinear optical resonators, researchers want to be able to understand and model the physics that underpin how they work. Marandi and his colleagues recently uncovered a potential way to engineer those rich physics, while discovering phase transitions in the light that is generated by the resonators. [Caltech story]

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Alireza Marandi Named 2019 KNI-Wheatley Scholar

11-04-19

Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, has been named the 2019 KNI-Wheatley Scholar in Nanoscience for his proposal to develop and study resonator-based quadratically nonlinear nanophotonic devices. [Past recipients]

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Professor Marandi Wins AFOSR Young Investigator Award

10-14-19

Professor Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, has won a 2019 Air Force Office of Scientific Research (AFOSR) Young Investigator Award. The objectives of this program are: to foster creative basic research in science and engineering, enhance early career development of outstanding young investigators, and increase opportunities for the young investigators to recognize the Air Force mission and the related challenges in science and engineering. Professor Marandi received the award for his proposal entitled, "Simulton Frequency Combs: Quadratic Solitons for Generation of Few-Cycle Pulses in the Mid- and Long-Wave Infrared."  [AFOSR Press Release]

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Professor Marandi Receives Okawa Research Grant

09-16-19

Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, is a recipient of a 2019 Okawa Foundation Research Grant for his research project entitled "Non-Von Neumann Computing Using Nonlinear Photonics." This prize honors top young researchers working in the fields of information and telecommunications. [Past Recipients]

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Professor Marandi Wins Young Scientist Award

05-07-19

Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, has received a 2019 Young Scientist Award of the International Union of Pure and Applied Physics (IUPAP). He was recognized “for contributions to nonlinear photonics, particularly his pioneering work on computing with networks of Optical parametric oscillators (OPOs) and demonstration of optical Ising machines, as well as half-harmonic generation of mid-infrared frequency combs.” [List of award winners]

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Professor Marandi Receives NSF CAREER Award

02-19-19

Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, has been awarded the National Science Foundation's (NSF) Faculty Early Career Development (CAREER) Award for his project, "Quadratically Nonlinear Micro-Resonators: Enabling Next Generation Photonic Devices and Systems." The CAREER program is NSF's most prestigious awards for junior faculty members. The level and 5-year duration of the awards are designed to enable awardees to develop careers as outstanding teacher-scholars. Awardees are chosen because they exemplify the role of teacher-scholars through outstanding research, excellent education and the integration of education and research within the context of the mission of their organizations.

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Illuminating New Possibilities

10-10-18

Alireza Marandi, Assistant Professor of Electrical Engineering, explores how nonlinear photonics, a field of optics, enables a broad range of previously less-explored opportunities for using lasers and light detectors for a variety of purposes, including molecular sensing and computing. One possible application of his work is in breath analysis. He describes, “ there's a lot of useful information about your health contained in your breath, but it is difficult to analyze because the concentrations are so low. To overcome that, you could analyze the spectra of exhaled breath using lasers, searching for the spectral "fingerprints," or signatures, that reveal the presence of those compounds.” [Interview with Professor Marandi]

Tags: EE research highlights Alireza Marandi