Nanoantenna couplers for metal-insulator-metal waveguide interconnects
Name
Onbasli-2010-Nanoantenna Couplers for Metal-Insulator-Metal Waveguide Interconnects.pdf
Size
691.41 KB
Format
Adobe PDF
Checksum (MD5)
5c9b704315d83ebb63e6b58e34313d3e
Author(s)
Onbasli, Mehmet Cengiz
Okyay, Ali K.
Date Issued
August 2010
Journal
Proceedings of SPIE--the International Society for Optical Engineering
Publisher
SPIE--the International Society for Optical Engineering
Citation
Onbasli, M. Cengiz, and Ali K. Okyay. “Nanoantenna Couplers for Metal-insulator-metal Waveguide Interconnects.” Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII,(September 10, 2010) Ed. Mark I. Stockman. 2010. 77573R–77573R–11. CrossRef. Web.© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering.
Version
Final published version
Abstract
State-of-the-art copper interconnects suffer from increasing spatial power dissipation due to chip downscaling and RC delays reducing operation bandwidth. Wide bandwidth, minimized Ohmic loss, deep sub-wavelength confinement and high integration density are key features that make metal-insulator-metal waveguides (MIM) utilizing plasmonic modes attractive for applications in on-chip optical signal processing. Size-mismatch between two fundamental components (micron-size fibers and a few hundred nanometers wide waveguides) demands compact coupling methods for implementation of large scale on-chip optoelectronic device integration. Existing solutions use waveguide tapering, which requires more than 4λ-long taper distances. We demonstrate that nanoantennas can be integrated with MIM for enhancing coupling into MIM plasmonic modes. Two-dimensional finite-difference time domain simulations of antennawaveguide structures for TE and TM incident plane waves ranging from λ = 1300 to 1600 nm were done. The same MIM (100-nm-wide Ag/100-nm-wide SiO2/100-nm-wide Ag) was used for each case, while antenna dimensions were systematically varied. For nanoantennas disconnected from the MIM; field is strongly confined inside MIM-antenna gap region due to Fabry-Perot resonances. Major fraction of incident energy was not transferred into plasmonic modes. When the nanoantennas are connected to the MIM, stronger coupling is observed and E-field intensity at outer end of core is enhanced more than 70 times.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1117/12.876177
