Department:SAS/ Physics and Astronomy
Research Overview: Jay is interested in systems ranging from molecules to nanomaterials to strongly correlated bulk solids, with a special interest in spin and orbital magnetism. Often his work aims to find new ways to understand these materials by introducing new static and transient optical spectroscopies. His group's time-resolved work on colossally magnetoresistive manganites compared spin and charge dynamics and found evidence for photonucleated transitory magnetic ordering using the dynamical magneto-optical Kerr effect. We have developed a method of optical magnetometry to produce background-free measurements of diamagnetic anisotropy in different chiralities of carbon nanotubes, a strategy we are now using for other low dimensional compounds. They introduced a method of phonon sideband spectroscopy for studying finite-momentum ‘dark’ excitons in carbon nanotubes, and used this technique to provide a comprehensive study of these excitons across a wide range of nanotube chiralities. His group has also recently developed a sub-picosecond photoluminescence system, which we used to study the Purcell effect in plasmonically enhanced nanowires. This Kerr gate system is one of only a few in the world and is now being employed to study charge and energy migration in nanocrystal assemblies.
Honors and Awards: 2001 William McMillan Award - NSF Faculty Early Career Development Award (2001-) - Alfred P. Sloan Fellow (2001-02) - Research Innovation Award (2000-02) - Parsons Foundation Fellow (1994-95) - Department of Education Condensed Matter Fellow (1991-93)