Brett L. Ringel;Jeffrey W. Teng;Mozhgan Hosseinzadeh;Delwyn G. Sam;Peter J. Francis;Hari Parameswaran;Arielle Little;George N. Tzintzarov;Daniele M. Monahan;Stephen D. LaLumondiere;John D. Cressler
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引用次数: 0
Abstract
The total-ionizing-dose (TID) responses of silicon and low-loss silicon-nitride (SiN) integrated waveguides are evaluated. Mach-Zehnder interferometers (MZIs), which allow for both TID-induced changes in effective refractive index (
$n_{\mathrm { eff}}$
) and transmission losses to be observed, were exposed to 10-keV highly localized X-ray pulses facilitating very high dose irradiation for small exposure areas. TID-induced shifts in
$n_{\mathrm { eff}}$
and transmission losses were observed for both waveguide types above 3 Mrad(Si), with the silicon waveguides exhibiting better radiation resilience for both metrics. Data collected were used to create Ansys Lumerical simulations to propose potential mechanisms of TID-induced degradation in waveguides. Furthermore, to better understand the effects of
$n_{\mathrm { eff}}$
degradation on other passive components, both silicon and SiN TID-damaged ring resonators were simulated in MATLAB. Differences in
$n_{\mathrm { eff}}$
changes and transmission losses imply that for high dose environments (>10 Mrad(Si)), when comparing waveguide types, silicon waveguides will provide similar loss performance and comparably smaller shifts in
$n_{\mathrm { eff}}$
compared to typically lower-loss SiN waveguides.
期刊介绍:
The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years.
The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.