EAS Remembers Roy W. Gould
Roy W. Gould, Simon Ramo Professor of Engineering, Emeritus, passed away on February 19, 2022. He was 94 years old. Gould earned his bachelor's degree from Caltech in 1949, a master's from Stanford University in 1950, and a doctorate from Caltech in 1956. After leaving Stanford, he worked as an engineer on missile guidance and control at JPL, which Caltech manages for NASA, and then at Hughes Aircraft. He joined Caltech's faculty in 1955. Gould started as an Assistant Professor of Electrical Engineering, became Associate Professor of Electrical Engineering in 1958, Associate Professor of Electrical Engineering and Physics in 1960, and Professor in 1962. He was named Professor of Applied Physics in 1974 and became Ramo Professor of Engineering in 1980. He served as Executive Officer of Applied Physics from 1973–79 and Chair of the Division of Engineering and Applied Science from 1979–85. Gould's research focused on plasma physics and thermonuclear fusion. During his long career, Gould earned numerous awards and recognitions. [Caltech story]
Chaining Atoms Together Yields Quantum Storage
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]
EAS New Horizons Diversity, Equity & Inclusion Award
The Division of Engineering and Applied Sciences seeks nominations to recognize and honor individuals within the EAS community who have actively contributed to EAS’s goal to be a diverse, equitable, and inclusive engineering community. The award is available to members of the EAS community, including current students, postdoctoral scholars, staff, and faculty. Nominations are due Wednesday, May 19, 2021 and are accepted from anyone in the EAS community, EAS alumni and members of the Caltech community. Click here for full description of how to make a nomination.
New Insight into Nonlinear Optical Resonators Unlocks Door to Numerous Potential Applications
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]