Design and analysis of high-index-contrast gratings using coupled mode theory

Aftab Ahmed; Marco Liscidini; Reuven Gordon

doi:10.1109/JPHOT.2010.2079322

Design and analysis of high-index-contrast gratings using coupled mode theory

Aftab Ahmed, Marco Liscidini, Reuven Gordon

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We analyze high-refractive-index-contrast subwavelength grating structures using truncated coupled mode theory (CMT). CMT not only provides physical insight into the role of each mode in the overall response but also allows for improved design. An analytic expression is derived for the design of broadband reflectors, providing a near-optimal design that is within 0.08% of the maximum broadband reflectivity calculated by the finite-difference time-domain method. Furthermore, the CMT is used to design a high-quality narrow-band reflector with 28% improved quality factor over previously reported results, as quantified by rigorous coupled wave analysis.

Original language	English (US)
Article number	5582125
Pages (from-to)	884-893
Number of pages	10
Journal	IEEE Photonics Journal
Volume	2
Issue number	6
DOIs	https://doi.org/10.1109/JPHOT.2010.2079322
State	Published - 2010
Externally published	Yes

Keywords

Photonic materials and engineered photonic structures
engineered photonic nanostructures
subwavelength structures
theory and design

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10.1109/JPHOT.2010.2079322

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title = "Design and analysis of high-index-contrast gratings using coupled mode theory",

abstract = "We analyze high-refractive-index-contrast subwavelength grating structures using truncated coupled mode theory (CMT). CMT not only provides physical insight into the role of each mode in the overall response but also allows for improved design. An analytic expression is derived for the design of broadband reflectors, providing a near-optimal design that is within 0.08% of the maximum broadband reflectivity calculated by the finite-difference time-domain method. Furthermore, the CMT is used to design a high-quality narrow-band reflector with 28% improved quality factor over previously reported results, as quantified by rigorous coupled wave analysis.",

keywords = "Photonic materials and engineered photonic structures, engineered photonic nanostructures, subwavelength structures, theory and design",

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AU - Liscidini, Marco

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AB - We analyze high-refractive-index-contrast subwavelength grating structures using truncated coupled mode theory (CMT). CMT not only provides physical insight into the role of each mode in the overall response but also allows for improved design. An analytic expression is derived for the design of broadband reflectors, providing a near-optimal design that is within 0.08% of the maximum broadband reflectivity calculated by the finite-difference time-domain method. Furthermore, the CMT is used to design a high-quality narrow-band reflector with 28% improved quality factor over previously reported results, as quantified by rigorous coupled wave analysis.

KW - Photonic materials and engineered photonic structures

KW - engineered photonic nanostructures

KW - subwavelength structures

KW - theory and design

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Design and analysis of high-index-contrast gratings using coupled mode theory

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