Overview
The Applied
Optical Physics Group focuses on the interactions of light with materials and
nanostructures that exhibit compelling optical and electro-optical
properties. Much of
our work has featured the dynamics of the insulator-to-metal transition of
vanadium dioxide, for applications in femtosecond silicon photonics, hybrid
metamaterials and dynamically reconfigurable metasurfaces. We fabricate Archimedean nanospirals at
dimensions smaller than the wavelength of light to study second-harmonic
generation and manipulate the orbital angular momentum in light beams Newer initiatives are yielding exciting
results in single-photon emitters for quantum information science and
applications, and control of the deep subwavelength, hyperbolic phonon
polaritons in a wide bandgap two-dimensional insulator, hexagonal boron
nitride. Our research projects all
incorporate a balance of nanomaterials growth and characterization; laser
spectroscopy and microscopy; and modeling and simulation. And we collaborate with groups around the
United States and around the world to use the unique capabilities of
synchrotron light sources and X-ray lasers.
Awards
-Fellow, American Physical Society
-Alexander von Humboldt Foundation Research Prize
-Alexander von Humboldt Foundation Research Fellowship
Selected Publications
Harmonic Generation up to Fifth Order from Al/Au/CuS Nanoparticle Films. Yan Y, Spear NJ, Meng Q, Singh MR, Macdonald JE, Haglund RF, Nano Letters, 24, , (2024) View Abstract
Substrate Chemistry and Lattice Effects in Vapor Transport Growth of Vanadium Dioxide Microcrystals. White ST, Thompson EA, Brown PF, Haglund RF , Crystal Growth and Design, 21, 3770-3778, (2023) View Abstract
Surface plasmon mediated harmonically resonant effects on third harmonic generation from Au and CuS nanoparticle films. Spear NJ, Yan YM, Queen JM, Singh MR, Macdonald JE, Haglund RF , Nanophotonics, 12, 273-284, (2023) View Abstract
Ultrafast X-ray imaging of the light-induced phase transition in VO2. Johnson AS, Perez-Salinas D, Siddiqui KM, Kim S, Choi S, Volckaert K, Majchrzak PE, Ulstrup S, Agarwal N, Hallman K, Haglund Jr RH, Gu?nther CM, Pfau B, Eisebitt S, Backes D, Maccherozzi F, Fitzpatrick A, Dhesi SS, Gargiani P, Valvidares M, Artrith N, de Groot F, Choi H, Jang D, Katoch A, Kwon S, Park SH, Kim H, Wall SE , Nature Physics, 19, 215-220, (2022) View Abstract
Sub-Picosecond Response Time of a Hybrid VO2:Silicon Waveguide at 1550 nm. Hallman KA, Miller KJ, Baydin A, Weiss SM, Haglund RF, Advanced Optical Materials, 9, 2001721, (2021) View Abstract
Education
Postdoctoral Scholar, Los Alamos National Laboratory, 1975-1977Ph.D., Nuclear Physics, University of North Carolina, Chapel Hill, 1975
M.A., Physics, State University of New York, Stony Brook, 1968
B.A. with honors, Physics, Wesleyan University, 1967