Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material
When two-dimensional electron gases (2DEGs) are exposed to a magnetic field, they resonantly absorb electromagnetic radiation via electronic transitions between Landau levels 1 . In 2DEGs with a Dirac spectrum, such as graphene, theory predicts an exceptionally high infrared magneto-absorption, even...
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| Veröffentlicht in: | Nature nanotechnology 2019-08, Vol.14 (8), p.756-761 |
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| creator | Nedoliuk, Ievgeniia O. Hu, Sheng Geim, Andre K. Kuzmenko, Alexey B. |
| description | When two-dimensional electron gases (2DEGs) are exposed to a magnetic field, they resonantly absorb electromagnetic radiation via electronic transitions between Landau levels
1
. In 2DEGs with a Dirac spectrum, such as graphene, theory predicts an exceptionally high infrared magneto-absorption, even at zero doping
2
–
5
. However, the measured Landau-level magneto-optical effects in graphene have been much weaker than expected
2
,
6
–
12
because of imperfections in the samples available for such experiments. Here, we measure magneto-transmission and Faraday rotation in high-mobility encapsulated monolayer graphene using a custom-designed set-up for magneto-infrared microspectroscopy. Our results show strongly enhanced magneto-optical activity in the infrared and terahertz ranges, characterized by absorption of light near to the 50% maximum allowed, 100% magnetic circular dichroism and high Faraday rotation. Considering that sizeable effects have been already observed at routinely achievable magnetic fields, our findings demonstrate the potential of magnetic tuning in 2D Dirac materials for long-wavelength optoelectronics and plasmonics.
Colossal magneto-optical activity on Landau levels in the mid-infrared and terahertz ranges is observed in high-mobility encapsulated graphene. |
| doi_str_mv | 10.1038/s41565-019-0489-8 |
| format | Article |
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1
. In 2DEGs with a Dirac spectrum, such as graphene, theory predicts an exceptionally high infrared magneto-absorption, even at zero doping
2
–
5
. However, the measured Landau-level magneto-optical effects in graphene have been much weaker than expected
2
,
6
–
12
because of imperfections in the samples available for such experiments. Here, we measure magneto-transmission and Faraday rotation in high-mobility encapsulated monolayer graphene using a custom-designed set-up for magneto-infrared microspectroscopy. Our results show strongly enhanced magneto-optical activity in the infrared and terahertz ranges, characterized by absorption of light near to the 50% maximum allowed, 100% magnetic circular dichroism and high Faraday rotation. Considering that sizeable effects have been already observed at routinely achievable magnetic fields, our findings demonstrate the potential of magnetic tuning in 2D Dirac materials for long-wavelength optoelectronics and plasmonics.
Colossal magneto-optical activity on Landau levels in the mid-infrared and terahertz ranges is observed in high-mobility encapsulated graphene.</description><identifier>ISSN: 1748-3387</identifier><identifier>EISSN: 1748-3395</identifier><identifier>DOI: 10.1038/s41565-019-0489-8</identifier><identifier>PMID: 31285609</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/766 ; 639/766/1130 ; 639/925 ; Absorption ; Chemistry and Materials Science ; Circular dichroism ; Dichroism ; Electromagnetic radiation ; Electron transitions ; Faraday effect ; Gases ; Graphene ; Infrared absorption ; Letter ; Magnetic fields ; Materials Science ; Nanotechnology ; Nanotechnology and Microengineering ; Optical activity ; Optoelectronics ; Plasmonics</subject><ispartof>Nature nanotechnology, 2019-08, Vol.14 (8), p.756-761</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Limited 2019</rights><rights>Copyright Nature Publishing Group Aug 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c438t-63f758f0fd8d13a53ddeccdddfe1fc01bc74548310c94b547ab84090198358753</citedby><cites>FETCH-LOGICAL-c438t-63f758f0fd8d13a53ddeccdddfe1fc01bc74548310c94b547ab84090198358753</cites><orcidid>0000-0003-2410-0252 ; 0000-0001-9574-6435 ; 0000-0003-2861-8331</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41565-019-0489-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/s41565-019-0489-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31285609$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Nedoliuk, Ievgeniia O.</creatorcontrib><creatorcontrib>Hu, Sheng</creatorcontrib><creatorcontrib>Geim, Andre K.</creatorcontrib><creatorcontrib>Kuzmenko, Alexey B.</creatorcontrib><title>Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material</title><title>Nature nanotechnology</title><addtitle>Nat. Nanotechnol</addtitle><addtitle>Nat Nanotechnol</addtitle><description>When two-dimensional electron gases (2DEGs) are exposed to a magnetic field, they resonantly absorb electromagnetic radiation via electronic transitions between Landau levels
1
. In 2DEGs with a Dirac spectrum, such as graphene, theory predicts an exceptionally high infrared magneto-absorption, even at zero doping
2
–
5
. However, the measured Landau-level magneto-optical effects in graphene have been much weaker than expected
2
,
6
–
12
because of imperfections in the samples available for such experiments. Here, we measure magneto-transmission and Faraday rotation in high-mobility encapsulated monolayer graphene using a custom-designed set-up for magneto-infrared microspectroscopy. Our results show strongly enhanced magneto-optical activity in the infrared and terahertz ranges, characterized by absorption of light near to the 50% maximum allowed, 100% magnetic circular dichroism and high Faraday rotation. Considering that sizeable effects have been already observed at routinely achievable magnetic fields, our findings demonstrate the potential of magnetic tuning in 2D Dirac materials for long-wavelength optoelectronics and plasmonics.
Colossal magneto-optical activity on Landau levels in the mid-infrared and terahertz ranges is observed in high-mobility encapsulated graphene.</description><subject>639/766</subject><subject>639/766/1130</subject><subject>639/925</subject><subject>Absorption</subject><subject>Chemistry and Materials Science</subject><subject>Circular dichroism</subject><subject>Dichroism</subject><subject>Electromagnetic radiation</subject><subject>Electron transitions</subject><subject>Faraday effect</subject><subject>Gases</subject><subject>Graphene</subject><subject>Infrared absorption</subject><subject>Letter</subject><subject>Magnetic fields</subject><subject>Materials Science</subject><subject>Nanotechnology</subject><subject>Nanotechnology and Microengineering</subject><subject>Optical activity</subject><subject>Optoelectronics</subject><subject>Plasmonics</subject><issn>1748-3387</issn><issn>1748-3395</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kFFrWyEYhmW0LG22H9CbcqA3u7HVo8bPy5F2baGwm-5uIEY9meGcY6amJfv1NSTLYNArhe95Xz8fhC4ouaaEwU3mVMwEJlRhwkFh-IDOqOSAGVPi5HgHOUHnOa8IEa1q-Uc0YbQFMSPqDP2cxz7mbPomjF0yybvGjK4pPplfPpU_zWCWoy8Rx3UJtmLGlvASyrbyjWnKa8QuDH7MIY51ehuSsTVT88H0n9BpZ_rsPx_OKfrx7e55_oCfvt8_zr8-YcsZFDxjnRTQkc6Bo8wI5py31jnXedpZQhdWcsGBUWIVXwguzQI4UfXbwARIwaboy753neLvjc9FDyFb3_dm9HGTddsKLoiSABW9-g9dxU2qq--oGUhQUraVonvKpion-U6vUxhM2mpK9E693qvXdQe9U693zZeH5s1i8O6Y-Ou6Au0eyHU0Ln369_T7rW-NAo7m</recordid><startdate>20190801</startdate><enddate>20190801</enddate><creator>Nedoliuk, Ievgeniia O.</creator><creator>Hu, Sheng</creator><creator>Geim, Andre K.</creator><creator>Kuzmenko, Alexey B.</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QO</scope><scope>7U5</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>F28</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>L6V</scope><scope>L7M</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M7P</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-2410-0252</orcidid><orcidid>https://orcid.org/0000-0001-9574-6435</orcidid><orcidid>https://orcid.org/0000-0003-2861-8331</orcidid></search><sort><creationdate>20190801</creationdate><title>Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material</title><author>Nedoliuk, Ievgeniia O. ; 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Nanotechnol</stitle><addtitle>Nat Nanotechnol</addtitle><date>2019-08-01</date><risdate>2019</risdate><volume>14</volume><issue>8</issue><spage>756</spage><epage>761</epage><pages>756-761</pages><issn>1748-3387</issn><eissn>1748-3395</eissn><abstract>When two-dimensional electron gases (2DEGs) are exposed to a magnetic field, they resonantly absorb electromagnetic radiation via electronic transitions between Landau levels
1
. In 2DEGs with a Dirac spectrum, such as graphene, theory predicts an exceptionally high infrared magneto-absorption, even at zero doping
2
–
5
. However, the measured Landau-level magneto-optical effects in graphene have been much weaker than expected
2
,
6
–
12
because of imperfections in the samples available for such experiments. Here, we measure magneto-transmission and Faraday rotation in high-mobility encapsulated monolayer graphene using a custom-designed set-up for magneto-infrared microspectroscopy. Our results show strongly enhanced magneto-optical activity in the infrared and terahertz ranges, characterized by absorption of light near to the 50% maximum allowed, 100% magnetic circular dichroism and high Faraday rotation. Considering that sizeable effects have been already observed at routinely achievable magnetic fields, our findings demonstrate the potential of magnetic tuning in 2D Dirac materials for long-wavelength optoelectronics and plasmonics.
Colossal magneto-optical activity on Landau levels in the mid-infrared and terahertz ranges is observed in high-mobility encapsulated graphene.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>31285609</pmid><doi>10.1038/s41565-019-0489-8</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-2410-0252</orcidid><orcidid>https://orcid.org/0000-0001-9574-6435</orcidid><orcidid>https://orcid.org/0000-0003-2861-8331</orcidid></addata></record> |
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| source | Springer Online Journals Complete; Nature Journals Online |
| subjects | 639/766 639/766/1130 639/925 Absorption Chemistry and Materials Science Circular dichroism Dichroism Electromagnetic radiation Electron transitions Faraday effect Gases Graphene Infrared absorption Letter Magnetic fields Materials Science Nanotechnology Nanotechnology and Microengineering Optical activity Optoelectronics Plasmonics |
| title | Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material |
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