FEL2010 - List of Authors (Fullagar, W.K.)

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Fullagar, W.K.

Paper	Title	Page
THPA11	Transient Optical Gratings for Short Pulse, Short Wavelength Ionising Radiation Studies - Opportunities and Approaches	592
	W.K. Fullagar, D.M. Paganin Monash University, Faculty of Science, Victoria C.J. Hall ASCo, Clayton, Victoria
	From a detection perspective, short wavelength phase information is lost 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 lasers or holography, Bragg's X-ray microscope* 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 such as spatial light modulators, array detectors and femtosecond lasers have become widely available, routinely allowing versatile and computer-interfaced imposition of optical phase, detection, and molecular coherent control in pump-probe studies. Today, FELs begin to offer opportunities for atomic resolution and ultrafast studies. Thus we investigate an overlooked aspect of Bragg's X-ray microscope: the short-wavelength to visible-wavelength, incoherent to coherent conversion that is a necessary prerequisite for coherent optical computations. Some potential approaches, techniques and opportunities are outlined. * W.L. Bragg, A new type of 'X-Ray microscope', Nature 143, 678 (1939)

Paper

Title

Page

THPA11

Transient Optical Gratings for Short Pulse, Short Wavelength Ionising Radiation Studies - Opportunities and Approaches

592

W.K. Fullagar, D.M. Paganin
Monash University, Faculty of Science, Victoria
C.J. Hall
ASCo, Clayton, Victoria

From a detection perspective, short wavelength phase information is lost 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 lasers or holography, Bragg's X-ray microscope* 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 such as spatial light modulators, array detectors and femtosecond lasers have become widely available, routinely allowing versatile and computer-interfaced imposition of optical phase, detection, and molecular coherent control in pump-probe studies. Today, FELs begin to offer opportunities for atomic resolution and ultrafast studies. Thus we investigate an overlooked aspect of Bragg's X-ray microscope: the short-wavelength to visible-wavelength, incoherent to coherent conversion that is a necessary prerequisite for coherent optical computations. Some potential approaches, techniques and opportunities are outlined.

* W.L. Bragg, A new type of 'X-Ray microscope', Nature 143, 678 (1939)