"Dielectric and Molecular Optical Antennas: Transmitters, Receivers, and Artificial Electromagnetic Materials"

Dr. Jon A. Schuller, Columbia University Energy Frontier Research Center (EFRC)

February 22nd (Wednesday), 8:30am
Engineering Science Building RM 2001

Antennas are at the heart of modern radio and microwave frequency communications technologies. Researchers have recently extended antenna concepts to the optical frequency domain, greatly enhancing light-matter interactions in a variety of nanophotonic systems (e.g. solar cells, molecular sensors, optical tweezers) [1]. Thus far, optical antennas have primarily been constructed from metallic materials which support plasmonic resonances. In this talk I experimentally and theoretically characterize optical antenna resonances in dielectric nanowires. I derive and verify a variety of general analytical results [2] applicable to all antenna systems and demonstrate novel antenna-based light emitters (transmitters) [3] and photo-detectors (receivers) [4]. I show that the collective response of multiple antennas can lead to interesting optical phenomena such as negative index of refraction [5]. I conclude by quantifying optical antenna effects in layered nanomaterials arising from distinct intra- and inter-layer exciton species [6].

[1] J.A. Schuller et al., Nature Mater. 9, 193 (2010).
[2] J.A. Schuller et al., Opt. Express 17, 24084 (2009).
[3] J.A. Schuller et al., Nature Photon. 3, 658 (2009).
[4] L. Cao et al., Nature Mater. 8, 643 (2009).
[5] J.A. Schuller et al., Phys. Rev. Lett. 99, 107401 (2007).
[6] J.A. Schuller et al., (submitted)

About Dr. Jon A. Schuller:

Dr. Jon A. Schuller received a B.S. in physics from UCSB in 2003 and graduated with a PhD in applied physics from Stanford University in 2009. In his thesis work on nanophotonics, Dr. Schuller pioneered investigations into optical antenna effects in dielectric nanostructures and applied these results to demonstrations of all-dielectric negative index metamaterials and subwavelength optical antenna thermal light emitters.

Dr. Schuller is currently the Columbia University Energy Frontier Research Center (EFRC) Fellow. In this interdisciplinary position Dr. Schuller collaborates with researchers in the Chemistry, Electrical Engineering, and Physics departments at Columbia in addition to scientists at Brown University, Case Western Reserve University, and Brookhaven National Labs to investigate the optical design of solar cells and the optical properties of solar cell materials.

Hosted by: Professor John Bowers