Nonperturbing observation of optical near field

Sekatskii, S.K.; Dietler, G.; Mironov, B.N.; Kompanets, V.O.; Matveets, Yu. A.; Chekalin, S.V.; Letokhov, V.S.
December 2003
Applied Physics Letters;12/15/2003, Vol. 83 Issue 24, p4900
Academic Journal
The spatial distribution of light intensity in the near field is studied by observing the photoelectron projection images of a subwavelength nanoaperture. The imaging electrons are obtained as a result of a two-photon external photoelectric effect induced in the aperture formed at the end of an optical fiber by femtosecond pulses of the second-harmonic radiation (410 nm) of a Ti:sapphire laser. The light-field distribution in the aperture is not distorted by any near-by object (such as a medium containing fluorescent molecules), which allows nonperturbing measurement of such a distribution. © 2003 American Institute of Physics.


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