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Joshua Caldwell

Joshua D. Caldwell

Cornelius Vanderbilt Chair of Mechanical Engineering
Professor of Electrical and Computer Engineering
Professor of Chemistry
334 Olin Hall
615-322-2413
Email

Overview

My research focuses on the confinement of electromagnetic energy and charged particles in the nano- to atomic-scale dimensions and the interactions between such confined systems. This involves the sub-diffractional confinement of light using 'polaritons' within the optical spectral domain (primarily the infrared), the design of nanoscale optical components, the role of polaritons in enhancing thermal conductivity, and identifying and characterizing novel optical, electro-optical, and electronic materials.



Awards

-Fellow of the Materials Research Society, Fellow of SPIE, Fellow of Optica
-Primary Inventor on NRL Edison Award (top patent of the year)
-4x NRL Alan Berman Award winner (top paper of the year)
-NRL Sabbatical Recipient at University of Manchester (UK) with the Novoselov group
-Chancellor鈥檚 Award for Research Excellence
-Plenary Speaker at 2023 AVS Meeting

Selected Publications

Multiresonant Nondispersive Infrared Gas Sensing: Breaking the Selectivity and Sensitivity Trade-Off. E. Bartelsen, R. Nolen, C.R. Gubbin, M. He, R.W. Spangler, J. Nordlander, C.L. Bogh, K. Diaz-Granados, S. De Liberato, J-P. Maria, J.R. McBride, J.D. Caldwell, ACS Photonics, 13, 1854-1862, (2026) View Abstract

Tailoring Phonon-Driven Responses in ?-MoO3 through Isotopic Enrichment. T.S. Arnaud, R.W. Spangler, J.D. Georgaras, J.B. Haber, D. Hirt, M. Obst, G. Alonzo-Perez, M. Long III, F.G. Kaps, J. Wetzel, C. Ragle, J.E. Buchner, Y. Kim, A. Senarath, R. Niemann, M. He, G. Carini, U. Arregui-Leon, A.C. Behara, R. Bangari, N. Sahoo, N.C. Brumby, J.M. Klopf, M. Wolf, L.M. Eng, S.C. Kehr, T.G. Folland, A. Paarmann, P.E. Hopkins, F. Jornada, J-P. Maria, J.D. Caldwell, Advanced Materials, 38, e73629, (2026) View Abstract

Tuning Vibrational Coupling Strength Between Hyperbolic Media and Organic Molecules. C.L. Ragle, J.E. Buchner, I-H. Lee, Y. Kim, B-I. Noh, S. Dixit, J. Matson, J. Li, S. Dai, J. H. Edgar, S-H. Oh, L.E. Buchanan, J.D. Caldwell, Nanophotonics, 15, e70051, (2026) View Abstract

Heavy Ion-Induced Single Event Leakage Current and Burnout in Homojunction Gan PiN Diodes. A.S. Senarath, S. Islam, A. Sengupta, T. Anderson, A. Jacobs, R. Kaplar, J.R. McBride, M.W. McCurdy, R.A. Reed, S.T. Pantelides, M.A. Ebrish, D.M. Fleetwood, J.D. Caldwell, R.D. Schrimpf , IEEE Transactions on Nuclear Science, 72, 2377-2385, (2025) View Abstract

Investigation of Natural Dyes and Taxonomic Identification of Fibers Used in Chancay Textiles by Vibrational Spectroscopy and Mass Spectrometry. K.S. Diaz-Granados, L.J. Bergemann, M. Ballard, G.A. Newsome, G.M. Kavich, J.D. Caldwell, T.P. Cleland, Journal of Proteome Research, 24, 710-728, (2025) View Abstract

Education

Ph.D., University of Florida, 2004

B.A., Virginia Tech, 2000