Terahertz saturable absorption in superconducting metamaterials
We present a superconducting metamaterial saturable absorber at terahertz frequencies. The metamaterial was designed to have a resonant absorption peak at 0.5 THz for T= 10K. The absorber consists of an array of split ring resonators (SRRs) etched from a 100 nm YBa sub(2) Cu sub(3) O sub(7) film. A...
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| Veröffentlicht in: | Journal of the Optical Society of America. B, Optical physics Optical physics, 2016-12, Vol.33 (12), p.2649-2655 |
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| container_issue | 12 |
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| container_title | Journal of the Optical Society of America. B, Optical physics |
| container_volume | 33 |
| creator | Keiser, George R. Zhang, Jingdi Zhao, Xiaoguang Zhang, Xin Averitt, Richard D. |
| description | We present a superconducting metamaterial saturable absorber at terahertz frequencies. The metamaterial was designed to have a resonant absorption peak at 0.5 THz for T= 10K. The absorber consists of an array of split ring resonators (SRRs) etched from a 100 nm YBa sub(2) Cu sub(3) O sub(7) film. A polyimide spacer layer and gold ground plane are placed above the SRRs using the metamaterial tape concept, creating a reflecting perfect absorber. Increasing either the temperature or incident electric field (E) decreases the superconducting condensate density and corresponding kinetic inductance of the SRRs. This alters the impedance matching in the metamaterial, broadening the resonance and reducing the peak absorption. At low electric fields, the experimental absorption was optimized near 80% at [functionof] = 0.47THz for T= 10K and decreased to 20% for T= 70K. For E= 40kV/cm and T= 10K, the peak absorption was 70%, decreasing to 40% at 200 kV/cm, corresponding to a modulation of 43%. |
| doi_str_mv | 10.1364/JOSAB.33.002649 |
| format | Article |
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The metamaterial was designed to have a resonant absorption peak at 0.5 THz for T= 10K. The absorber consists of an array of split ring resonators (SRRs) etched from a 100 nm YBa sub(2) Cu sub(3) O sub(7) film. A polyimide spacer layer and gold ground plane are placed above the SRRs using the metamaterial tape concept, creating a reflecting perfect absorber. Increasing either the temperature or incident electric field (E) decreases the superconducting condensate density and corresponding kinetic inductance of the SRRs. This alters the impedance matching in the metamaterial, broadening the resonance and reducing the peak absorption. At low electric fields, the experimental absorption was optimized near 80% at [functionof] = 0.47THz for T= 10K and decreased to 20% for T= 70K. 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For E= 40kV/cm and T= 10K, the peak absorption was 70%, decreasing to 40% at 200 kV/cm, corresponding to a modulation of 43%.</description><subject>Absorption</subject><subject>Arrays</subject><subject>Electric fields</subject><subject>Etching</subject><subject>Ground plane</subject><subject>Metamaterials</subject><subject>Modulation</subject><subject>POLYIMIDES</subject><subject>SUPERCONDUCTIVITY</subject><subject>YTTRIUM OXIDE</subject><issn>0740-3224</issn><issn>1520-8540</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNotkD1PwzAURS0EEqUws0ZMLGltPzt1JlQQn6rUgTJbtvNCjdIk2M4Av55AmM5ydHV1CLlkdMGgEMuX7ev6dgGwoJQXojwiMyY5zZUU9JjM6ErQHDgXp-Qsxg9KqaCcz8jNDoPZY0jfWTRpCMY2mBkbu9An37WZb7M49Bhc11aDS759zw6YzMEkDN408Zyc1CPw4p9z8vZwv7t7yjfbx-e79SZ3ACrlZW1sZUtacCxQSVbxUloqJApXc4alVJYLbirOKslo7Yy1qiixrhTDChTAnFxNu11MXkfnE7r9eKpFlzQDgFVRjNL1JPWh-xwwJn3w0WHTmBa7IWqm1BhHcl6O6nJSXehiDFjrPviDCV-aUf3bU__11AB66gk_g8BpMQ</recordid><startdate>20161201</startdate><enddate>20161201</enddate><creator>Keiser, George R.</creator><creator>Zhang, Jingdi</creator><creator>Zhao, Xiaoguang</creator><creator>Zhang, Xin</creator><creator>Averitt, Richard D.</creator><general>Optical Society of America</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20161201</creationdate><title>Terahertz saturable absorption in superconducting metamaterials</title><author>Keiser, George R. ; Zhang, Jingdi ; Zhao, Xiaoguang ; Zhang, Xin ; Averitt, Richard D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c338t-9fabdb9062e6e851d295b045e4cf21e958b242ad21d510fcabb869efd81ed3833</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Absorption</topic><topic>Arrays</topic><topic>Electric fields</topic><topic>Etching</topic><topic>Ground plane</topic><topic>Metamaterials</topic><topic>Modulation</topic><topic>POLYIMIDES</topic><topic>SUPERCONDUCTIVITY</topic><topic>YTTRIUM OXIDE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Keiser, George R.</creatorcontrib><creatorcontrib>Zhang, Jingdi</creatorcontrib><creatorcontrib>Zhao, Xiaoguang</creatorcontrib><creatorcontrib>Zhang, Xin</creatorcontrib><creatorcontrib>Averitt, Richard D.</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Journal of the Optical Society of America. B, Optical physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Keiser, George R.</au><au>Zhang, Jingdi</au><au>Zhao, Xiaoguang</au><au>Zhang, Xin</au><au>Averitt, Richard D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Terahertz saturable absorption in superconducting metamaterials</atitle><jtitle>Journal of the Optical Society of America. B, Optical physics</jtitle><date>2016-12-01</date><risdate>2016</risdate><volume>33</volume><issue>12</issue><spage>2649</spage><epage>2655</epage><pages>2649-2655</pages><issn>0740-3224</issn><eissn>1520-8540</eissn><abstract>We present a superconducting metamaterial saturable absorber at terahertz frequencies. The metamaterial was designed to have a resonant absorption peak at 0.5 THz for T= 10K. The absorber consists of an array of split ring resonators (SRRs) etched from a 100 nm YBa sub(2) Cu sub(3) O sub(7) film. 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| source | Optica Publishing Group Journals |
| subjects | Absorption Arrays Electric fields Etching Ground plane Metamaterials Modulation POLYIMIDES SUPERCONDUCTIVITY YTTRIUM OXIDE |
| title | Terahertz saturable absorption in superconducting metamaterials |
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