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
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Additional details
- Eprint ID
- 87426
- Resolver ID
- CaltechAUTHORS:20180627-161213458
- HEPC.dsr.12.29
- West Virginia Higher Education Policy Commission
- DGE-1102689
- NSF Graduate Research Fellowship
- Created
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2018-06-28Created from EPrint's datestamp field
- Updated
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2023-06-02Created from EPrint's last_modified field