Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-08-02
2005-08-02
Spector, David N. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S335000, C385S037000
Reexamination Certificate
active
06924920
ABSTRACT:
The present invention provides a method for modulating light by a driven particle beam is disclosed. An optical beam is being sent to metal-dielectric structure so that the optical field partially transforms into a delayed electromagnetic wave, in a preferred embodiment into the surface evanescent mode, and the beam of charged particles, such as electrons, is also sent to said structure the way that the particle's kinetic energy partially transforms into energy of the delayed electromagnetic wave having the same phase-frequency characteristics as transformed field of optical beam at that, transformation of the optical beam and excitation of wave by particle beam commonly take place at the same small space region, which is localized by said metal-dielectric structure. Delayed electromagnetic wave, which is generated by particle beam, is summarized with the optical field, which is transformed on said structure. Therefore, the particle beam influences on intensity of optical beam observed after passing the region of localized transformation. The controlled changing of parameters of particle beam in interaction region leads to adequate changing of intensity of the optical beam passed through said region and this way the predetermined modulation realizes.
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Keyack Albert T.
Spector David N.
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