86 research outputs found
Positive and Normative Judgments Implicit in U.S. Tax Policy, and the Costs of Unequal Growth and Recessions
In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
An in situ transmission-based
system has been designed to optically
monitor the ellipsometry constants of a hyperbolic plasmonic metamaterial
during electrochemical growth. The metamaterial, made from an array
of vertically aligned gold nanorods, has demonstrated an unprecedented
ability to manipulate the polarization of light using subwavelength
thickness slabs, making in situ ellipsometric data a powerful tool
in the controlled design of such components. In this work, we show
practical proof-of-principle of this design method and rationalize
the ellipsometric output on the basis of the modal properties of the
nanorod metamaterial. The real-time optical monitoring setup provides
excellent control and repeatability of nanostructure growth for the
design of future ultrathin optical components. The performance of
the ellipsometric method was also tested as a refractive index sensor.
Monitoring refractive index changes near the metamaterial’s
epsilon near zero (ENZ) frequency showed a sensitivity on the order
of 500°/RIU in the ellipsometric phase for a metamaterial that
shows 250 nm/RIU sensitivity in its extinction
Ferromagnetic Resonance Study of Deposition Conditions in Ni<sub>x</sub>Fe<sub>100-x</sub>Â Thin Films for Shielding Applications
Dynamic in situ optical and magneto-optical monitoring of the growth of Co-Pd multilayers
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