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Marcus Dyba

City: Gottingen
State/Country: DE

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Patents
US7253893 - Method and apparatus for spatially limited excitation of an optical transition -  08/07/2007 
A method of exciting an optical transition in a narrowly limited area of a material comprising the steps of focusing an excitation light beam whose wavelength is tuned to the optical transition to be excited into a focal area extending beyond a focal point; splitting up a de-excitation light beam which is at least somehow influencing the optical transition into at least two partial beams; focusing the at least two partial beams of the de-excitation light beam out of different directions onto the focal point to form a spatially extending interference pattern in the focal area; adjusting a relative phase of the at least two partial beams of the de-excitation light beam so that the interference pattern has an intensity minimum at the focal point and a plurality of intensity maxima on different sides of the focal point; and aberrating the wave fronts of the at least two partial beams of the de-excitation light beam so that the intensity maxima of the interference pattern on different sides of the focal point are spatially expanded without eliminating the intensity minimum at the focal point.
US20040207854 - Method and apparatus for spatially limited excitation of an optical transition -  10/21/2004 
A method of exciting an optical transition in a narrowly limited area of a material comprising the steps of focusing an excitation light beam whose wavelength is tuned to the optical transition to be excited into a focal area extending beyond a focal point; splitting up a de-excitation light beam which is at least somehow influencing the optical transition into at least two partial beams; focusing the at least two partial beams of the de-excitation light beam out of different directions onto the focal point to form a spatially extending interference pattern in the focal area; adjusting a relative phase of the at least two partial beams of the de-excitation light beam so that the interference pattern has an intensity minimum at the focal point and a plurality of intensity maxima on different sides of the focal point; and aberrating the wave fronts of the at least two partial beams of the de-excitation light beam so that the intensity maxima of the interference pattern on different sides of the focal point are spatially expanded without eliminating the intensity minimum at the focal point.

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