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 15.03.2007   Карта сайта     Language По-русски По-английски
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15.03.2007

Letter


Nature 446, 301-304 (15 March 2007) | doi:10.1038/nature05595; Received 12 September 2006; Accepted 3 January 2007


Adaptive subwavelength control of nano-optical fields


Martin Aeschlimann1, Michael Bauer2, Daniela Bayer1, Tobias Brixner3, F. Javier García de Abajo4, Walter Pfeiffer5, Martin Rohmer1, Christian Spindler3 and Felix Steeb1



  1. Fachbereich Physik, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany
  2. Institut für Experimentelle und Angewandte Physik, Universität Kiel, Leibnizstr. 19, 24118 Kiel, Germany
  3. Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
  4. Instituto de Optica-CSIC, Serrano 121, 28006 Madrid, Spain
  5. Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33516 Bielefeld, Germany


Correspondence to: Tobias Brixner3 Correspondence and requests for materials should be addressed to T.B. (Email: brixner@physik.uni-wuerzburg.de).





Adaptive shaping of the phase and amplitude of femtosecond laser pulses has been developed into an efficient tool for the directed manipulation of interference phenomena, thus providing coherent control over various quantum-mechanical systems1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Temporal resolution in the femtosecond or even attosecond range has been demonstrated, but spatial resolution is limited by diffraction to approximately half the wavelength of the light field (that is, several hundred nanometres). Theory has indicated11, 12 that the spatial limitation to coherent control can be overcome with the illumination of nanostructures: the spatial near-field distribution was shown to depend on the linear chirp of an irradiating laser pulse. An extension of this idea to adaptive control, combining multiparameter pulse shaping with a learning algorithm, demonstrated the generation of user-specified optical near-field distributions in an optimal and flexible fashion13. Shaping of the polarization of the laser pulse14, 15 provides a particularly efficient and versatile nano-optical manipulation method16, 17. Here we demonstrate the feasibility of this concept experimentally, by tailoring the optical near field in the vicinity of silver nanostructures through adaptive polarization shaping of femtosecond laser pulses14, 15 and then probing the lateral field distribution by two-photon photoemission electron microscopy18. In this combination of adaptive control1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and nano-optics19, we achieve subwavelength dynamic localization of electromagnetic intensity on the nanometre scale and thus overcome the spatial restrictions of conventional optics. This experimental realization of theoretical suggestions11, 12, 13, 16, 17, 20 opens a number of perspectives in coherent control, nano-optics, nonlinear spectroscopy, and other research fields in which optical investigations are carried out with spatial or temporal resolution.



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А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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