Open AccessControlling temperature dependence of silicon waveguide using slot structure
Author(s) -
Jong-Moo Lee,
Duk-Jun Kim,
Gwan-Ha Kim,
O–Kyun Kwon,
Kap-Joong Kim,
Gyungock Kim
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.001645
Subject(s) - silicon , materials science , cladding (metalworking) , resonator , waveguide , slab , optics , slot waveguide , wavelength , silicon photonics , refractive index , optoelectronics , composite material , physics , geophysics
We show that the temperature dependence of a silicon waveguide can be controlled well by using a slot waveguide structure filled with a polymer material. Without a slot, the amount of temperature-dependent wavelength shift for TE mode of a silicon waveguide ring resonator is very slightly reduced from 77 pm/ degrees C to 66 pm/ degrees C by using a polymer (WIR30-490) upper cladding instead of air upper cladding. With a slot filled with the same polymer, however, the reduction of the temperature dependence is improved by a pronounced amount and can be controlled down to -2 pm/ degrees C by adjusting several variables of the slot structure, such as the width of the slot between the pair of silicon wires, the width of the silicon wire pair, and the height of the silicon slab in our experiment. This measurement proves that a reduction in temperature dependence can be improved about 8 times more by using the slot structure.