Open AccessRotating polarization spectroscopy for single nano-antenna characterization
Author(s) -
Govinda Lilley,
K. Unterrainer
Publication year - 2013
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.21.030903
Subject(s) - optics , polarization (electrochemistry) , materials science , monochromatic color , spectroscopy , linear polarization , light beam , nano , beam (structure) , laser , optoelectronics , physics , chemistry , quantum mechanics , composite material
We report on a novel micro-spectroscopic technique to quantitatively measure the extinction cross-section σ(ext) of few and single linearly polarizing nano-antennas. This technique relies on rotating the linear polarization of a monochromatic laser beam at a frequency ω(1) while optically chopping the incident beam at ω(2) and using lock-in detection with a switched reference frequency input to measure the amount of scattered and absorbed power. The amount of power removed from the beam corresponds to σ(ext) of the polarizing nano-structure. Furthermore, this technique is easy to integrate into existing microscopy or micro-photoluminescence setups and does not depend on the sample's temperature.