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Title: Embedded air core optical nano-waveguides
Authors: Lim, S.T.
Png, C.E.
Danner, A.J. 
Issue Date: 1-Oct-2010
Source: Lim, S.T., Png, C.E., Danner, A.J. (2010-10-01). Embedded air core optical nano-waveguides. Journal of the Optical Society of America B: Optical Physics 27 (10) : 1937-1941. ScholarBank@NUS Repository.
Abstract: We propose a nanometer-scale hollow core waveguide that can be fabricated with standard methods on a silicon-on-insulator substrate. High optical confinement in the core is possible, making such a waveguide structure suitable for sensing applications, applications making use of strong optical nonlinearities, and optofluidics applications. We extend a historical method (Marcatili's method) to provide analytical solutions for field distributions in the device and simulate power confinement, intensity, and parametric dependencies with beam propagation and finite-difference time-domain methods for two polarizations. In an example worked out, the optical confinement in the air core is ̃40% of the total waveguide power, which is favorable to that of a standard slot waveguide. The intensity per μm2 in the hollow core is 95% higher than in the silicon cladding region, indicating that avoiding optical nonlinearities is also possible. © 2010 Optical Society of America.
Source Title: Journal of the Optical Society of America B: Optical Physics
ISSN: 07403224
DOI: 10.1364/JOSAB.27.001937
Appears in Collections:Staff Publications

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