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‘Joshua Caldwell’

Novel advanced light design and fabrication process could revolutionize sensing technologies

Oct. 21, 2021—Vanderbilt and Penn State engineers have developed a novel approach to design and fabricate thin-film infrared light sources with near-arbitrary spectral output driven by heat, along with a machine learning methodology called inverse design that reduced the optimization time for these devices from weeks or months on a multi-core computer to a few minutes on...

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Photonics discovery portends dramatic efficiencies in silicon chips

Mar. 1, 2021—A team led by Vanderbilt engineers has achieved the ability to transmit two different types of optical signals across a single chip at the same time. The breakthrough heralds a potentially dramatic increase in the volume of data a silicon chip can transmit over any period of time. With this project, the research team moved...

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Researchers develop unique process for producing light-matter mixture

Dec. 7, 2020—Discovery provides insight for developing next generation optoelectronic and infrared devices In groundbreaking new research, an international team that includes a Vanderbilt engineer has developed a unique process for producing a quantum state that is part light and part matter. The discovery provides fundamental new insights for more efficiently developing the next generation of quantum-based...

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Caldwell, Hatzell are inaugural Flowers Family Faculty Fellows in Engineering

Apr. 27, 2020—Mechanical engineering professors Joshua Caldwell and Kelsey Hatzell are inaugural recipients of Flowers Family faculty awards. Caldwell is the Flowers Family Chancellor’s Faculty Fellow in Engineering. Hatzell is the Flowers Family Dean’s Faculty Fellow in Engineering. The awards target professors who have shown a strong evidence of scientific accomplishment early in their careers and are...

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Caldwell is 2020 Materials Research Society Fellow

Feb. 21, 2020—Vanderbilt professor Joshua D. Caldwell has been selected as a 2020 Materials Research Society Fellow. The MRS Fellows will be recognized at the society’s spring meeting in Phoenix in April. The fellowship recognizes Caldwell for pioneering contributions to the understanding and utilization of polar semiconductors for power electronics and infrared nanophotonics, and for his volunteerism...

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Phase change materials may free up valuable real estate for optical data transmission

Nov. 21, 2018—New research into the phase-changing capabilities of vanadium dioxide and infrared properties of hexagonal boron nitride holds promise for faster, more efficient optical data transmission, particularly in big data “farms” where thousands of computers must communicate to provide answers. A team composed of researchers from Vanderbilt University, the University of Georgia and Kansas State University...

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Five professors named Junior Faculty Teaching Fellows

Aug. 17, 2018—Five engineering professors have been named Junior Faculty Teaching Fellows by the Vanderbilt University Center for Teaching. They join 12 other faculty members in the 2018-2019 class of fellows, the largest class since the program’s inception in 2010. They are assistant professors Leon Bellan, mechanical engineering; Uttam Ghosh, computer science; Taylor Johnson, computer engineering; Kenny...

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Hyperlens crystal capable of viewing living cells in unprecedented detail

Dec. 12, 2017—New hyperlens crystal is capable of resolving details as small as a virus on the surface of living cells. The atomic structure of the hexagonal boron nitride crystal is shown in the cutout. (Keith Wood / Vanderbilt) Just imagine: An optical lens so powerful that it lets you view features the size of a small...

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