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| 3. |
- Drexler, C., et al.
(författare)
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Terahertz radiation induced edge currents in graphene
- 2011
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Ingår i: RMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves. - 9781457705090
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Konferensbidrag (refereegranskat)abstract
- We report on the observation of the terahertz radiation induced edge photogalvanic effect. The directed net electric current is generated in single layer graphene by the irradiation of the samples' edges with linearly or circularly polarized terahertz laser radiation at normal incidence. We show that the directed net electric current stems from the sample edges, which reduce locally the symmetry and result in an asymmetric scattering of carriers driven by the radiation field.
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| 4. |
- Ganichev, S.D., et al.
(författare)
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Photon helicity driven currents in graphene
- 2010
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Ingår i: IRMMW-THz 2010 - 35th International Conference on Infrared, Millimeter, and Terahertz Waves, Conference Guide. - 9781424466573
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We report on the observation of photon helicity driven currents in graphene. We demonstrate that by illuminating unbiased monolayer graphene samples with terahertz (THz) laser radiation at room temperature under oblique and normal incidence causes directed electric currents. This includes currents which are solely driven by the light's helicity.
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| 5. |
- Garcia-Ruiz, A., et al.
(författare)
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Hermetic all-fiber phase modulators using Joule heating in carbon-coated fibers
- 2018
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Ingår i: Optics InfoBase Conference Papers. - Washington, D.C. : OSA - The Optical Society. - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- Certain applications of fiber sensors (e.g. avionics, oil industry) imply extreme operating conditions spurring the development of hermetic all-fiber devices. We present a hermetic all-fiber phase modulator based on Joule heating in a carbon-coated fiber.
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| 6. |
- Gladyshev, Alexey V., et al.
(författare)
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Second-order nonlinearity in optical fibers : Achievements and perspectives
- 2016
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Ingår i: Optics InfoBase Conference Papers. - 9781943580170
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Konferensbidrag (refereegranskat)abstract
- Recent progress in thermal poling of silica fibers is reviewed. It is demonstrated that state-of-the-art poled fibers can be used in a number of practical applications. Challenges for further development of poled fiber devices are discussed and possible solutions proposed.
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| 7. |
- Karch, J., et al.
(författare)
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Dynamic Hall Effect Driven by Circularly Polarized Light in a Graphene Layer
- 2010
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Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 105:22, s. 227402-
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Tidskriftsartikel (refereegranskat)abstract
- We report the observation of the circular ac Hall effect where the current is solely driven by the crossed ac electric and magnetic fields of circularly polarized radiation. Illuminating an unbiased monolayer sheet of graphene with circularly polarized terahertz radiation at room temperature generates-under oblique incidence-an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. Alike the classical dc Hall effect, the voltage is caused by crossed E and B fields which are, however rotating with the lights frequency.
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| 8. |
- Karch, J., et al.
(författare)
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Terahertz Radiation Driven Chiral Edge Currents in Graphene
- 2011
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Ingår i: Physical Review Letters. - : American Physical Society. - 1079-7114 .- 0031-9007. ; 107:27
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Tidskriftsartikel (refereegranskat)abstract
- We observe photocurrents induced in single-layer graphene samples by illumination of the graphene edges with circularly polarized terahertz radiation at normal incidence. The photocurrent flows along the sample edges and forms a vortex. Its winding direction reverses by switching the light helicity from left to right handed. We demonstrate that the photocurrent stems from the sample edges, which reduce the spatial symmetry and result in an asymmetric scattering of carriers driven by the radiation electric field. The developed theory based on Boltzmann's kinetic equation is in a good agreement with the experiment. We show that the edge photocurrents can be applied for determination of the conductivity type and the momentum scattering time of the charge carriers in the graphene edge vicinity.
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| 9. |
- Lago, L., et al.
(författare)
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Specialty fibres and components for advanced microscopy
- 2014
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Ingår i: Specialty Optical Fibers, SOF 2014. - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- We investigate fibre basic functions like SHG and pulse gating. We achieved 5.2% conversion efficiency into green light with 50 W peak pump power and demonstrated in-fibre pulse gating at 1 MHz repetition rate. © 2014 OSA.
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| 10. |
- Myren, N, et al.
(författare)
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In-fiber electrode lithography
- 2004
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Ingår i: Journal of the Optical Society of America B (Optical Physics. ; 21:12, s. 2085-88
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Tidskriftsartikel (refereegranskat)
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