Transient optical gratings for short pulse, short wavelength ionising radiation studies - Opportunities and approaches

W. K. Fullagar, D. M. Paganin, C. J. Hall

    Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


    Loss of short wavelength phase information occurs when event sizes exceed radiation wavelengths, making conventional holography impossible above a material-dependent quantum energy limit. Despite this, and prior to the invention of holography or lasers, Bragg's X-ray microscope [1] opened the door to optical computation in short-wavelength studies using spatially coherent visible light, including phase retrieval methods. This optical approach lost ground to semiconductor detection and digital computing in the 1960s. Since then, visible optics including spatial light modulators, array detectors and femtosecond lasers have become widely available, routinely allowing versatile and computer-interfaced imposition of optical phase, molecular coherent control, and detection. Today, free electron lasers (FELs) begin to offer opportunities for atomic resolution and ultrafast pump-probe studies. Thus we investigate an overlooked aspect of Bragg's X-ray microscope: the incoherent ionising radiation to coherent visible (IICV) spatial light modulator (SLM) conversion that is a necessary prerequisite for coherent optical computations. Some potential opportunities and approaches are outlined.

    Original languageEnglish
    Title of host publicationFEL 2010 - 32nd International Free Electron Laser Conference
    Number of pages4
    Publication statusPublished - 2010
    Event32nd International Free Electron Laser Conference, FEL 2010 - Malmo City, Sweden
    Duration: 23 Aug 201027 Aug 2010


    Conference32nd International Free Electron Laser Conference, FEL 2010
    CityMalmo City

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