We have devised a simple method to determine the absorption and radiative decay rates of surface plasmon polaritons in an Au nanohole array by combining polarization-resolved reflectivity spectroscopy and temporal coupled-mode theory. The dependence of two rates on wavelength has been measured and they are found to agree with finite-difference time-domain simulations. As both absorption and radiative decay rates play a key role in several plasmonic applications, our approach offers a simple and effective means in determining them.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: October 18, 2012
Revised Manuscript: November 7, 2012
Manuscript Accepted: November 12, 2012
Published: December 11, 2012
Zhaolong Cao, Hau-Yung Lo, and Hock-Chun Ong, "Determination of absorption and radiative decay rates of surface plasmon polaritons from nanohole array," Opt. Lett. 37, 5166-5168 (2012)