Plasmon lasers at deep subwavelength scale

Rupert F. Oulton, Volker J. Sorger, Thomas Zentgraf, Ren-Min Ma, Christopher Gladden, Lun Dai, Guy Bartal and Xiang Zhang ()
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Rupert F. Oulton: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA
Volker J. Sorger: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA
Thomas Zentgraf: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA
Ren-Min Ma: State Key Lab for Mesoscopic Physics and School of Physics, Peking University
Christopher Gladden: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA
Lun Dai: State Key Lab for Mesoscopic Physics and School of Physics, Peking University
Guy Bartal: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA
Xiang Zhang: NSF Nanoscale Science and Engineering Centre, 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA

Nature, 2009, vol. 461, issue 7264, 629-632

Abstract: Plasmonic lasers advance To push the physical limitations of lasers to the nanoscale regime it is necessary to tackle the fundamental challenge of surpassing the diffraction limit. It has been suggested that surface plasmons — light–matter waves trapped on the surface of a conductor — can be used to tightly confine light on very short length scales, but such approaches have been previously hampered by severe losses. Oulton et al. now demonstrate that it is possible to circumvent this problem by utilizing a hybrid between a dielectric waveguide and a conducting surface supporting a plasmon mode, thereby showing the experimental realization of a nanoscale plasmonic laser with an optical mode a hundred times smaller than the diffraction limit. Such hybrid plasmonic coherent light sources offer the possibility to explore extreme interactions between light and matter, and may open important new avenues in optoelectronics.

Date: 2009
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DOI: 10.1038/nature08364

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