Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry
A method for analysis of spectroscopic ellipsometry data is demonstrated to extract the optical conductivity of mono- and bilayer chemical-vapor-deposited graphene. We model graphene as a truly two-dimensional (2D) material with a sheet conductivity, rather than a phenomenological effective refracti...
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| Veröffentlicht in: | Applied physics letters 2014-06, Vol.104 (26) |
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| container_title | Applied physics letters |
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| creator | Chang, You-Chia Liu, Chang-Hua Liu, Che-Hung Zhong, Zhaohui Norris, Theodore B. |
| description | A method for analysis of spectroscopic ellipsometry data is demonstrated to extract the optical conductivity of mono- and bilayer chemical-vapor-deposited graphene. We model graphene as a truly two-dimensional (2D) material with a sheet conductivity, rather than a phenomenological effective refractive index as has been used in the literature. This technique measures both the real and imaginary part of the optical conductivity, which is important for graphene optoelectronics and metamaterials. Using this method, we obtain broadband measurements of the complex optical conductivity for mono- and bilayer graphene from ultraviolet to mid-infrared wavelengths. We also study how chemical doping with nitric acid modifies the complex optical conductivity. |
| doi_str_mv | 10.1063/1.4887364 |
| format | Article |
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We model graphene as a truly two-dimensional (2D) material with a sheet conductivity, rather than a phenomenological effective refractive index as has been used in the literature. This technique measures both the real and imaginary part of the optical conductivity, which is important for graphene optoelectronics and metamaterials. Using this method, we obtain broadband measurements of the complex optical conductivity for mono- and bilayer graphene from ultraviolet to mid-infrared wavelengths. We also study how chemical doping with nitric acid modifies the complex optical conductivity.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4887364</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Bilayers ; Broadband ; Chemical vapor deposition ; Conductivity ; Graphene ; Metamaterials ; Nitric acid ; Optoelectronics ; Organic chemistry ; Refractivity ; Spectroellipsometry ; Two dimensional models</subject><ispartof>Applied physics letters, 2014-06, Vol.104 (26)</ispartof><rights>2014 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c323t-e5a0aaa950f0bf18f9130fb712225bcec38ff0e0ecbfd6459ccf753821f2919d3</citedby><cites>FETCH-LOGICAL-c323t-e5a0aaa950f0bf18f9130fb712225bcec38ff0e0ecbfd6459ccf753821f2919d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,27907,27908</link.rule.ids></links><search><creatorcontrib>Chang, You-Chia</creatorcontrib><creatorcontrib>Liu, Chang-Hua</creatorcontrib><creatorcontrib>Liu, Che-Hung</creatorcontrib><creatorcontrib>Zhong, Zhaohui</creatorcontrib><creatorcontrib>Norris, Theodore B.</creatorcontrib><title>Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry</title><title>Applied physics letters</title><description>A method for analysis of spectroscopic ellipsometry data is demonstrated to extract the optical conductivity of mono- and bilayer chemical-vapor-deposited graphene. We model graphene as a truly two-dimensional (2D) material with a sheet conductivity, rather than a phenomenological effective refractive index as has been used in the literature. This technique measures both the real and imaginary part of the optical conductivity, which is important for graphene optoelectronics and metamaterials. Using this method, we obtain broadband measurements of the complex optical conductivity for mono- and bilayer graphene from ultraviolet to mid-infrared wavelengths. We also study how chemical doping with nitric acid modifies the complex optical conductivity.</description><subject>Applied physics</subject><subject>Bilayers</subject><subject>Broadband</subject><subject>Chemical vapor deposition</subject><subject>Conductivity</subject><subject>Graphene</subject><subject>Metamaterials</subject><subject>Nitric acid</subject><subject>Optoelectronics</subject><subject>Organic chemistry</subject><subject>Refractivity</subject><subject>Spectroellipsometry</subject><subject>Two dimensional models</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNotkM9LwzAcxYMoOKcH_4OAJw-d-SZLmx5lzB8w8KIHTyFNv9k62qYmmaz_vZXt9Hi8D-_BI-Qe2AJYLp5gsVSqEPnygsyAFUUmANQlmTHGRJaXEq7JTYz7yUouxIx8r48pGJuafkvTDqn13dDikfohNda0k-_rwxT_Nmmk3tHO9z6jpq9p1bRmxEC3wQw77JFWI8W2bYboO0xhvCVXzrQR7846J18v68_VW7b5eH1fPW8yK7hIGUrDjDGlZI5VDpQrQTBXFcA5l5VFK5RzDBnaytX5UpbWukIKxcHxEspazMnDqXcI_ueAMem9P4R-mtQceC4LmSuYqMcTZYOPMaDTQ2g6E0YNTP8_p0GfnxN_mONhSw</recordid><startdate>20140630</startdate><enddate>20140630</enddate><creator>Chang, You-Chia</creator><creator>Liu, Chang-Hua</creator><creator>Liu, Che-Hung</creator><creator>Zhong, Zhaohui</creator><creator>Norris, Theodore B.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20140630</creationdate><title>Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry</title><author>Chang, You-Chia ; Liu, Chang-Hua ; Liu, Che-Hung ; Zhong, Zhaohui ; Norris, Theodore B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c323t-e5a0aaa950f0bf18f9130fb712225bcec38ff0e0ecbfd6459ccf753821f2919d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Applied physics</topic><topic>Bilayers</topic><topic>Broadband</topic><topic>Chemical vapor deposition</topic><topic>Conductivity</topic><topic>Graphene</topic><topic>Metamaterials</topic><topic>Nitric acid</topic><topic>Optoelectronics</topic><topic>Organic chemistry</topic><topic>Refractivity</topic><topic>Spectroellipsometry</topic><topic>Two dimensional models</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chang, You-Chia</creatorcontrib><creatorcontrib>Liu, Chang-Hua</creatorcontrib><creatorcontrib>Liu, Che-Hung</creatorcontrib><creatorcontrib>Zhong, Zhaohui</creatorcontrib><creatorcontrib>Norris, Theodore B.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chang, You-Chia</au><au>Liu, Chang-Hua</au><au>Liu, Che-Hung</au><au>Zhong, Zhaohui</au><au>Norris, Theodore B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry</atitle><jtitle>Applied physics letters</jtitle><date>2014-06-30</date><risdate>2014</risdate><volume>104</volume><issue>26</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>A method for analysis of spectroscopic ellipsometry data is demonstrated to extract the optical conductivity of mono- and bilayer chemical-vapor-deposited graphene. We model graphene as a truly two-dimensional (2D) material with a sheet conductivity, rather than a phenomenological effective refractive index as has been used in the literature. This technique measures both the real and imaginary part of the optical conductivity, which is important for graphene optoelectronics and metamaterials. Using this method, we obtain broadband measurements of the complex optical conductivity for mono- and bilayer graphene from ultraviolet to mid-infrared wavelengths. We also study how chemical doping with nitric acid modifies the complex optical conductivity.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4887364</doi></addata></record> |
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| ispartof | Applied physics letters, 2014-06, Vol.104 (26) |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Bilayers Broadband Chemical vapor deposition Conductivity Graphene Metamaterials Nitric acid Optoelectronics Organic chemistry Refractivity Spectroellipsometry Two dimensional models |
| title | Extracting the complex optical conductivity of mono- and bilayer graphene by ellipsometry |
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