|approved||all_optical_electric_field_induced_second_harmonic_generation.pdf||2015-04-27 10:31:02||Roderick Davidson|
Author: Roderick B Davidson
Requested Type: Either Oral or Poster
Submitted: 2015-04-08 09:09:16
Co-authors: Anna Yanchenko, Jed I. Ziegler, Sergey M. Avanesyan, Ben J. Lawrie, Richard F. Haglund Jr.
6301 Stevenson Center
Nashville, Tennessee 37235
Efficient frequency modulation techniques are crucial to the development of plasmonic meta-surfaces for information processing and energy conversion. Nanoscale electric field confinement in optically pumped plasmonic structures enables stronger nonlinear susceptibilities than are attainable in bulk materials. The interaction of three distinct electric fields in χ3 optical processes allows for all-optical modulation of nonlinear signals. Here we demonstrate efficient third-order second harmonic generation (SHG) in a serrated nanogap plasmonic geometry that generates steep electric field gradients within a dielectric material. We utilize an ultrafast optical pump to control the plasmonically induced electric fields and to generate bandwidth-limited second-harmonic pulses driven by the control pulses. All-optical control of these designer plasmonic metasurfaces enables ultrafast switching technologies for on-chip nonlinear processes.