We theoretically study the cascaded four-wave mixing (FWM) in broadband tapered plasmonic nanoantennas. In comparison with nonlinear bulk medium they demonstrate a 300-fold increase in nonlinear frequency conversion detected in the main lobe of the nanoantenna far-field pattern. This is achieved by tuning the elements of the nanoantenna to resonance frequencies involved in the FWM interaction. Our findings have a potentially broad application in ultrafast nonlinear spectroscopy, sensing, on-chip optical frequency conversion, nonlinear optical metamaterials, and photon sources.
© 2012 Optical Society of America
Original Manuscript: August 27, 2012
Revised Manuscript: November 28, 2012
Manuscript Accepted: December 7, 2012
Published: December 20, 2012
I. S. Maksymov, A. E. Miroshnichenko, and Yu. S. Kivshar, "Cascaded four-wave mixing in tapered plasmonic nanoantenna," Opt. Lett. 38, 79-81 (2013)