Open AccessPower monitoring in dielectric-loaded surface plasmon-polariton waveguides
Author(s) -
Ashwani Kumar,
Jacek Gosciniak,
Thomas B. Andersen,
Laurent Markey,
Alain Dereux,
Sergey I. Bozhevolnyi
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.002972
Subject(s) - materials science , surface plasmon polariton , optics , surface plasmon , optoelectronics , magnesium fluoride , dielectric , polarization (electrochemistry) , wavelength , waveguide , wheatstone bridge , plasmon , voltage , layer (electronics) , nanotechnology , chemistry , physics , quantum mechanics , resistor
We report on propagating mode power monitoring in dielectric-loaded surface plasmon-polariton waveguides (DLSPPWs) by measuring the resistance of gold stripes supporting the DLSPPW mode propagation. Inevitable absorption of the DLSPPW mode in metal causes an increase in the stripe temperature and, thereby, in its resistance whose variations are monitored with an external Wheatstone bridge being accurately balanced in the absence of radiation in a waveguide. The investigated waveguide configuration consists of a 1-µm-thick and 10-µm-wide polymer ridges tapered laterally to a 1-µm-wide ridge placed on a 50-nm-thin and 4-µm-wide gold stripe, all supported by a magnesium fluoride substrate. Using single-mode polarization-maintaining fiber for in- and out-coupling of radiation, DLSPPW mode power monitoring at telecom wavelengths is realized with the responsivities of up to ~1.8 µV/µW (showing weak wavelength dependence) being evaluated for a bias voltage of 1 V.