Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 28, 2018 | Submitted
Report Open

Terahertz Waveguiding in Silicon-Core Fibers

Abstract

We propose the use of a silicon-core optical fiber for terahertz (THz) waveguide applications. Finite-difference time-domain simulations have been performed based on a cylindrical waveguide with a silicon core and silica cladding. High-resistivity silicon has a flat dispersion over a 0.1 - 3 THz range, making it viable for propagation of tunable narrowband CW THz and possibly broadband picosecond pules of THz radiation. Simulations show the propagation dynamics and the integrated intensity, from which transverse mode profiles and absorption lengths are extraced. It is found that for 140 - 250 micron core diameters the mode is primarily confined to the core, such that the overall absorbance is only slightly less than in bulk polycrystalline silicon.

Additional Information

The authors wish to thank Robert R. Rice for useful discussions. DAB and SKC were supported by a Research Challenge Grant from the West Virginia Higher Education Policy Commission (HEPC.dsr.12.29) and NSF Graduate Research Fellowship (#1102689), respectively.

Attached Files

Submitted - 1305.0520.pdf

Files

1305.0520.pdf
Files (271.1 kB)
Name Size Download all
md5:872b52079ea035d667026e6fe30fe71c
271.1 kB Preview Download

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023