期刊
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
卷 26, 期 6, 页码 1383-1391出版社
A V S AMER INST PHYSICS
DOI: 10.1116/1.2975196
关键词
membranes; optical waveguides; polaritons; surface plasmons
The fabrication and physical characterisation of waveguides and integrated components on freestanding membranes are described. The waveguides consist of a thin (20-25 nm) narrow (similar to 5 mu m) Au/Cr stripe, on an ultrathin (20-30 nm) large-area (similar to 1 mm(2)) freestanding Si3N4 membrane clamped around its perimeter to an underlying Si substrate. The integrated components are implemented with this waveguide and consist of Mach-Zehnder interferometers and couplers. The waveguide and components are dimensioned such that they propagate long-range surface plasmon-polariton waves in a vacuum (air) or H2O background. The fabrication process flow adopted and some specific process steps are described. Physical characterisation was conducted on structures having undergone intermediate process steps and on finished structures, and characterisation results are given and discussed. The structures were found to be robust enough for careful use, and to routinely sustain similar to 3 mu N of point force without shattering.
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