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Ultra-Thin Camera Creates Images Without Lenses

06-22-17

Professor Ali Hajimiri and colleagues have developed a new camera design that replaces the lenses with an ultra-thin optical phased array (OPA). The OPA does computationally what lenses do using large pieces of glass: it manipulates incoming light to capture an image. "Here, like most other things in life, timing is everything. With our new system, you can selectively look in a desired direction and at a very small part of the picture in front of you at any given time, by controlling the timing with femto-second—quadrillionth of a second—precision," says Professor Hajimiri. [Caltech story] [ENGenious silicon photonics feature]

Tags: EE research highlights MedE Ali Hajimiri

Professor Hajimiri Elected to National Academy of Inventors

12-16-15

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering; Executive Officer for Electrical Engineering; Director, Information Science and Technology, has been named fellow of the National Academy of Inventors (NAI). His research covers broad areas within high-speed and high-frequency electronics- and photonics-integrated circuits. This year, the Hajimiri group synthesized a 3-D camera—called a nanophotonic coherent imager—that provides the highest depth-measurement accuracy (similar to resolution) of any such nanophotonic 3-D imaging device. Election as an NAI fellow is an honor bestowed upon academic innovators and inventors who have "demonstrated a prolific spirit of innovation in creating or facilitating outstanding inventions and innovations that have made a tangible impact on quality of life, economic development, and the welfare of society." [Caltech story] [NAI release]

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Space Solar Power Initiative

04-28-15

Caltech and Northrop Grumman Corporation have signed a $17.5 million sponsored research agreement for the development of the Space Solar Power Initiative (SSPI). The initiative will develop technologies in three areas: high-efficiency ultralight photovoltaics; ultralight deployable space structures; and phased array and power transmission. "The Space Solar Power Initiative brings together electrical engineers, applied physicists, and aerospace engineers in the type of profound interdisciplinary collaboration that is seamlessly enhanced at a small place like Caltech... We are working on extremely difficult problems that could eventually provide the world with new, and very cost-competitive technology for sustainable energy,” said EAS Chair Ares Rosakis. [Caltech story] [Northrop Grumman Release]

Tags: APhMS EE energy research highlights GALCIT Harry Atwater Ares Rosakis Ali Hajimiri Sergio Pellegrino

Ali Hajimiri's New Camera Chip Provides Superfine 3-D Resolution

04-06-15

To make an exact copy of an object with a 3-D printer, you must first produce a high-resolution scan of the object with a 3-D camera that measures its height, width, and depth. The most sensitive systems generally are too large and expensive to be used in consumer applications. Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, has created a new device called a nanophotonic coherent imager (NCI) that is an inexpensive silicon chip less than a millimeter. The NCI provides the highest depth-measurement accuracy of any such nanophotonic 3-D imaging device. 3-D imaging may be a possible feature in future smartphones. [Caltech story]

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Professor Hajimiri Receives IEEE Microwave Prize

03-06-15

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, and colleagues Steven Bowers, Kaushik Sengupta, and Kaushik Dasgupta were awarded the 2015 Microwave Prize for the most significant contribution by a published paper in the previous year to the field of interest of the IEEE Microwave Theory and Techniques Society. The paper is entitled “Integrated Self-Healing for mm-Wave Power Amplifiers”. IEEE Microwave Theory and Techniques Society promotes the advancement of microwave theory and its applications, including radio frequency, microwave, millimeter-wave, and terahertz technologies. [List of past recipients]

Tags: EE honors MedE Ali Hajimiri Kaushik Sengupta Steven Bowers Kaushik Dasgupta

Professor Hajimiri Receives Excellence in Teaching Award

07-07-14

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, has received a 2013-2014 Associated Students of the California Institute of Technology (ASCIT) Teaching Award. [List of past recipients]

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Bending the Light with a Tiny Chip

03-10-14

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, and colleagues have developed a new light-bending silicon chip that acts as a lens-free projector--and could one day end up in your cell phone. They were able to bypass traditional optics by manipulating the coherence of light—a property that allows the researchers to "bend" the light waves on the surface of the chip without lenses or the use of any mechanical movement. [Caltech Release]

Tags: EE energy research highlights MedE Ali Hajimiri

Creating Indestructible Self-Healing Circuits

03-11-13

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, and colleagues have built electronic chips that repair themselves. The team has demonstrated this self-healing capability in tiny power amplifiers. The amplifiers are so small, in fact, that 76 of the chips—including everything they need to self-heal—could fit on a single penny. In perhaps the most dramatic of their experiments, the team destroyed various parts of their chips by zapping them multiple times with a high-power laser, and then observed as the chips automatically developed a work-around in less than a second. [Caltech Release]

Tags: EE energy MedE Ali Hajimiri

A New Tool for Secret Agents—And the Rest of Us

12-10-12

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, and Postdoctoral Scholar in Electrical Engineering, Kaushik Sengupta, have developed tiny inexpensive silicon microchips that generate terahertz (THz) waves that fall into a largely untapped region of the electromagnetic spectrum and that can penetrate a host of materials without the ionizing damage of X-rays. When incorporated into handheld devices, the new microchips could enable a broad range of applications in fields ranging from homeland security to wireless communications to health care, and even touchless gaming. "This extraordinary level of creativity, which has enabled imaging in the terahertz frequency range, is very much in line with Caltech's long tradition of innovation in the area of CMOS technology," says Chair Ares Rosakis. "Caltech engineers, like Ali Hajimiri, truly work in an interdisciplinary way to push the boundaries of what is possible." [Caltech Release]

Tags: EE energy research highlights MedE health Ali Hajimiri Kaushik Sengupta

Intellectual Ventures-Caltech Invention Competition Winners Announced

03-16-12

Third place in the 2012 Intellectual Ventures Invention Competition and $10,000 went to senior Alexander Hu and graduate students Steven Bowers, Kaushik Dasgupta, and Kaushik Sengupta. Drawing inspiration from the biological world and the ability of living things to heal wounds, they designed a circuit with its own fully integrated system for self-healing.  This group was mentored by Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering. [Caltech Feature]

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