All-optical generation of surface plasmons in graphene
The strong confinement of plasmons in graphene makes them interesting for practical applications, but also difficult to excite. An all-optical technique can excite plasmons in graphene over a range of frequencies. Surface plasmons in graphene offer a compelling route to many useful photonic technolo...
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| Veröffentlicht in: | Nature physics 2016-02, Vol.12 (2), p.124-127 |
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| creator | Constant, T. J. Hornett, S. M. Chang, D. E. Hendry, E. |
| description | The strong confinement of plasmons in graphene makes them interesting for practical applications, but also difficult to excite. An all-optical technique can excite plasmons in graphene over a range of frequencies.
Surface plasmons in graphene offer a compelling route to many useful photonic technologies
1
,
2
,
3
. As a plasmonic material, graphene offers several intriguing properties, such as excellent electro-optic tunability
4
, crystalline stability, large optical nonlinearities
5
and extremely high electromagnetic field concentration
6
. As such, recent demonstrations of surface plasmon excitation in graphene using near-field scattering of infrared light
7
,
8
have received intense interest. Here we present an all-optical plasmon coupling scheme which takes advantage of the intrinsic nonlinear optical response of graphene. Free-space, visible light pulses are used to generate surface plasmons in a planar graphene sheet using difference frequency wave mixing to match both the wavevector and energy of the surface wave. By carefully controlling the phase matching conditions, we show that one can excite surface plasmons with a defined wavevector and direction across a large frequency range, with an estimated photon efficiency in our experiments approaching 10
−5
. |
| doi_str_mv | 10.1038/nphys3545 |
| format | Article |
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Surface plasmons in graphene offer a compelling route to many useful photonic technologies
1
,
2
,
3
. As a plasmonic material, graphene offers several intriguing properties, such as excellent electro-optic tunability
4
, crystalline stability, large optical nonlinearities
5
and extremely high electromagnetic field concentration
6
. As such, recent demonstrations of surface plasmon excitation in graphene using near-field scattering of infrared light
7
,
8
have received intense interest. Here we present an all-optical plasmon coupling scheme which takes advantage of the intrinsic nonlinear optical response of graphene. Free-space, visible light pulses are used to generate surface plasmons in a planar graphene sheet using difference frequency wave mixing to match both the wavevector and energy of the surface wave. By carefully controlling the phase matching conditions, we show that one can excite surface plasmons with a defined wavevector and direction across a large frequency range, with an estimated photon efficiency in our experiments approaching 10
−5
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Surface plasmons in graphene offer a compelling route to many useful photonic technologies
1
,
2
,
3
. As a plasmonic material, graphene offers several intriguing properties, such as excellent electro-optic tunability
4
, crystalline stability, large optical nonlinearities
5
and extremely high electromagnetic field concentration
6
. As such, recent demonstrations of surface plasmon excitation in graphene using near-field scattering of infrared light
7
,
8
have received intense interest. Here we present an all-optical plasmon coupling scheme which takes advantage of the intrinsic nonlinear optical response of graphene. Free-space, visible light pulses are used to generate surface plasmons in a planar graphene sheet using difference frequency wave mixing to match both the wavevector and energy of the surface wave. By carefully controlling the phase matching conditions, we show that one can excite surface plasmons with a defined wavevector and direction across a large frequency range, with an estimated photon efficiency in our experiments approaching 10
−5
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J.</au><au>Hornett, S. M.</au><au>Chang, D. E.</au><au>Hendry, E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>All-optical generation of surface plasmons in graphene</atitle><jtitle>Nature physics</jtitle><stitle>Nature Phys</stitle><date>2016-02-01</date><risdate>2016</risdate><volume>12</volume><issue>2</issue><spage>124</spage><epage>127</epage><pages>124-127</pages><issn>1745-2473</issn><eissn>1745-2481</eissn><abstract>The strong confinement of plasmons in graphene makes them interesting for practical applications, but also difficult to excite. An all-optical technique can excite plasmons in graphene over a range of frequencies.
Surface plasmons in graphene offer a compelling route to many useful photonic technologies
1
,
2
,
3
. As a plasmonic material, graphene offers several intriguing properties, such as excellent electro-optic tunability
4
, crystalline stability, large optical nonlinearities
5
and extremely high electromagnetic field concentration
6
. As such, recent demonstrations of surface plasmon excitation in graphene using near-field scattering of infrared light
7
,
8
have received intense interest. Here we present an all-optical plasmon coupling scheme which takes advantage of the intrinsic nonlinear optical response of graphene. Free-space, visible light pulses are used to generate surface plasmons in a planar graphene sheet using difference frequency wave mixing to match both the wavevector and energy of the surface wave. By carefully controlling the phase matching conditions, we show that one can excite surface plasmons with a defined wavevector and direction across a large frequency range, with an estimated photon efficiency in our experiments approaching 10
−5
.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/nphys3545</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0002-9555-9696</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 639/301/357/918 639/624/400/1021 639/624/400/385 Atomic Atoms & subatomic particles Classical and Continuum Physics Complex Systems Condensed Matter Physics Electromagnetic fields Excitation Experiments Frequency ranges Graphene letter Mathematical and Computational Physics Molecular Nonlinearity Optical and Plasma Physics Photonics Photons Physics Plasma physics Plasmons Surface waves Technology Theoretical |
| title | All-optical generation of surface plasmons in graphene |
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