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Adaptive Pulse Shaping Provides Photoselective Molecular Excitation

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Researchers from the Universität Würzburg in Germany have discovered that selective excitation of individual molecule types in a heterogeneous solution, while not attainable through manipulation of single parameters such as wavelength or linear chirp control, is possible through adaptive femtosecond pulse shaping. The team used a combination of a pulse shaper and an automated "learning loop" algorithm to selectively excite one of two similar -- yet chemically distinct -- dye molecules suspended in the same solution. The pulse shaper used spectral phase modulation to vary laser fields based...Read full article

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    Published: January 2002
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