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New Optical Switch Could Lead to Ultrafast All-Optical Signal Processing

07-30-22

One of the major limitations of optics-based systems at present is that, at a certain point, they still need to have electronics-based transistors to efficiently process the data. Now, a team led by Alireza Marandi, Assistant Professor of Electrical Engineering and Applied Physics, has created an all-optical switch. Such a switch could eventually enable data processing using photons. Device nanofabrication was performed at the Kavli Nanoscience Institute (KNI) at Caltech. [Caltech story]

Tags: research highlights KNI Alireza Marandi Rajveer Nehra Saman Jahani Luis Ledezma Arkadev Roy Qiushi Guo Ryoto Sekine Robert Gray

Nanofabrication Courses Let Caltech Undergraduates Get Hands-on at the Smallest Scales

05-27-22

The course combines topical lectures that give the students a preview of what they will be doing in the cleanroom along with hands-on practical training. Both components are conducted as a team effort between Scherer and the KNI technical staff. The first two lectures of the term were presented by KNI’s microscopist, Dr. Annalena Wolff, who lectured on scanning electron and focused ion beam microscopy. Additional lectures were presented by KNI’s Associate Director of Technical Operations, Dr. Guy DeRose, on electron beam lithography.

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Tags: APhMS EE research highlights MedE Axel Scherer KNI Changsoon Choi Paromita Mitchell Annalena Wolff Guy DeRose Bert Mendoza Alex Wertheim Kelly McKenzie

Böttger Luster: Solving an Artistic Cold Case

05-19-22

In the 18th century, a new purple overglaze enamel emerged from a factory near Dresden, Germany. Named after a German pioneer of porcelain and supposed alchemist, Johann Friedrich Böttger, this iridescent glaze became known as Böttger luster. Why this porcelain overglaze exhibited iridescence when other purple glazes of the time lacked a lustrous shine remained a mystery until now. The research that started at Northwestern University over a decade ago recently finished at Caltech under the leadership of Katherine Faber, Simon Ramo Professor of Materials Science. [Caltech story]

Tags: research highlights KNI Katherine Faber Celia Chari Zane Taylor Sujing Xie Anikó Bezur

Chaining Atoms Together Yields Quantum Storage

02-17-22

Engineers at Caltech have developed an approach for quantum storage that could help pave the way for the development of large-scale optical quantum networks. "The ability to build a technology reproducibly and reliably is key to its success," says graduate student Andrei Ruskuc. "In the scientific context, this let us gain unprecedented insight into microscopic interactions between ytterbium qubits and the vanadium atoms in their environment." The new system relies on nuclear spins—the angular momentum of an atom's nucleus—oscillating collectively as a spin wave. This collective oscillation effectively chains up several atoms to store information. "Based on our previous work, single ytterbium ions were known to be excellent candidates for optical quantum networks, but we needed to link them with additional atoms. We demonstrate that in this work," says Andrei Faraon, Professor of Applied Physics and Electrical Engineering. [Read the paper] [Caltech story]

Tags: APhMS EE research highlights MedE KNI Andrei Faraon Andrei Ruskuc

Professor Mirhosseini Receives Okawa Foundation Research Grant

02-09-22

Mohammad Mirhosseini, Assistant Professor of Electrical Engineering and Applied Physics, has been selected as a recipient of 2021 Okawa Foundation Research Grant for developing optical interconnects for microwave quantum processors. [Research Grant Recipients]

Tags: APhMS EE honors KNI Mohammad Mirhosseini

Mohammad Mirhosseini Named 2022 KNI-Wheatley Scholar

01-17-22

Mohammad Mirhosseini, assistant professor of Electrical Engineering and Applied Physics, is the recipient of the 2022 KNI-Wheatley Scholarship in Nanoscience, for his proposal to develop on-chip transducers that provide optical interconnects for superconducting qubits, one of the leading platforms for quantum computers.

Tags: honors KNI Mohammad Mirhosseini KNI-Wheatley Scholarship

Yu-Chong Tai Receives 2021 SoCalBio Innovation Award

12-06-21

Yu-Chong Tai, Anna L. Rosen Professor of Electrical Engineering and Medical Engineering; Andrew and Peggy Cherng Medical Engineering Leadership Chair; Executive Officer for Medical Engineering, has been awarded the 2021 Innovation Award for Outstanding Researcher by The Southern California Biomedical Council (SoCalBio). The Award is meant to recognize and celebrate the contributions of Greater Los Angeles Region's bioscience entrepreneurs, researchers, and educators.

Tags: EE MedE MCE KNI

Joseph Falson Named William H. Hurt Scholar

11-05-21

A $75 million gift from the late William (Bill) H. Hurt has established a suite of endowed early-career professorships that brings young faculty together to collaborate, build connections across disciplines, and engage in research and teaching that has the potential to define new fields of study, develop technologies, and advance innovative solutions to address the greatest challenges of the day. Joseph Falson, Assistant Professor of Materials Science, is among four faculty members who make up the inaugural cohort of William H. Hurt Scholars. William H. Hurt Scholars receive unrestricted funding and gain a network of colleagues with whom they will interact through programming designed to catalyze new research ideas and collaborations. [Caltech story]

Tags: APhMS honors KNI Joseph Falson

Harry Atwater Receives Von Hippel Award

11-02-21

Harry Atwater, Otis Booth Leadership Chair, Division of Engineering and Applied Science; Howard Hughes Professor of Applied Physics and Materials Science; Director, Liquid Sunlight Alliance, received the 2021 Von Hippel Award, the Materials Research Society’s (MRS) highest honor. Atwater is being recognized “for fundamental research in light-matter interactions—particularly nanophotonics, plasmonics, photonic metamaterials, and solar energy conversion—and numerous applications of photon control of materials illustrating the value of fundamental research to technologies that improve the quality of life.” The Von Hippel Award recognizes those qualities most prized by materials scientists and engineers—brilliance and originality of intellect, combined with vision that transcends the boundaries of conventional scientific disciplines, as exemplified by the life of Arthur von Hippel. [MRS story]

Tags: APhMS honors Harry Atwater KNI

Caltech and Amazon Partner to Create New Hub of Quantum Computing

10-26-21

This past year, a new two-story building took shape in the northeast corner of the Caltech campus. Though modest in design, what takes place inside the structure could transform the future of computing. The building is the AWS Center for Quantum Computing, the result of a partnership between Caltech and Amazon Web Services, the cloud-computing branch of Amazon. The goal of the collaboration is to create quantum computers and related technologies that have the potential to revolutionize data security, machine learning, medicine development, sustainability practices, and more. "AWS will benefit from the ideas percolating here on campus," says Oskar Painter, John G. Braun Professor of Applied Physics and Physics and head of quantum hardware at AWS. Painter says quantum computing is still a very young technology, so it is crucial for development efforts to be directly connected to the latest research in academia. [Caltech story]

Tags: APhMS CMS Oskar Painter KNI Fernando Brandão