Unified Approach to Ultrasonic Light Diffraction

Klein, W.; Cook, Bill D.

doi:10.1109/t-su.1967.29423

Cited by 503 publications

(156 citation statements)

References 14 publications

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“…The diffraction behaviour of Fresnel zone plates (and gratings in general) is classified into three regimes (Maser & Schmahl, 1992;Moharam & Gaylord, 1981;Klein & Cook, 1967); (i) the Raman-Nath (Raman & Nath, 1935) where the zone plate behaves like a thin grating and where, for instance, the theory developed by Kirz is applicable (Kirz, 1974); (ii) the Bragg regime, in which the FZP behaves like a thick grating; and (iii) the intermediate diffraction regime. The FZPs that fall into the Raman-Nath regime are characterized by very large Ár n relative to wavelength and very low aspect ratio.…”

Section: Materials Selection and Performance Expectations For Future mentioning

confidence: 99%

Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling

Mayer

Keskinbora

Grévent

et al. 2013

J Synchrotron Radiat

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Fresnel zone plates (FZPs) recently showed significant improvement by focusing soft X-rays down to ∼10 nm. In contrast to soft X-rays, generally a very high aspect ratio FZP is needed for efficient focusing of hard X-rays. Therefore, FZPs had limited success in the hard X-ray range owing to difficulties of manufacturing high-aspect-ratio zone plates using conventional techniques. Here, employing a method of fabrication based on atomic layer deposition (ALD) and focused ion beam (FIB) milling, FZPs with very high aspect ratios were prepared. Such multilayer FZPs with outermost zone widths of 10 and 35 nm and aspect ratios of up to 243 were tested for their focusing properties at 8 keV and shown to focus hard X-rays efficiently. This success was enabled by the outstanding layer quality thanks to ALD.Viathe use of FIB for slicing the multilayer structures, desired aspect ratios could be obtained by precisely controlling the thickness. Experimental diffraction efficiencies of multilayer FZPs fabricatedviathis combination reached up to 15.58% at 8 keV. In addition, scanning transmission X-ray microscopy experiments at 1.5 keV were carried out using one of the multilayer FZPs and resolved a 60 nm feature size. Finally, the prospective of different material combinations with various outermost zone widths at 8 and 17 keV is discussed in the light of the coupled wave theory and the thin-grating approximation. Al2O3/Ir is outlined as a promising future material candidate for extremely high resolution with a theoretical efficiency of more than 20% for as small an outermost zone width as 10 nm at 17 keV.

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Section: Materials Selection and Performance Expectations For Future mentioning

confidence: 99%

Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling

Mayer

Keskinbora

Grévent

et al. 2013

J Synchrotron Radiat

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“…Within such an application of the AOC, one can imagine that the AOC's aperture is going to zero, so that space-time signal , the acoustic transit time through that focal spot has the order of . It should be noted that with growing the KleinCook parameter [23], which is accompanied by increasing the diffraction efficiency of AOC, the output light cone assumes an elliptic shape due to appearing wave mismatch. Nevertheless, this estimation is rather close to allowable time of direct electronic amplitude modulation for the laser diodes or LEDs.…”

Section: Spatially One-dimensional Acousto-optical Input Devicesmentioning

confidence: 99%

High-Resolution Broadband Millimeter-Wave Astrophysical Spectrometer with Triple Product Acousto-Optical Processor

Dagostino¹,

Shcherbakov²,

Arellanes³

et al. 2013

IJAA

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An advanced conceptual design of a high-bit-rate triple product acousto-optical processor is presented that can be applied in a number of astrophysical problems. We briefly describe the Large Millimeter Telescope as one of the potential observational infrastructures where the acousto-optical spectrometer can be successfully used. A summary on the study of molecular gas in relatively old (age > 10 Myr) disks around main sequence stars is provided. We have identified this as one of the science cases in which the proposed processor can have a big impact. Then we put forward triple product acousto-optical processor is able to realize algorithm of the space-and-time integrating, which is desirable for a wideband spectrum analysis of radio-wave signals with an improved resolution providing the resolution power of about 10 5 -10 6 . It includes 1D-acousto-optic cells as the input devices for a 2D-optical data processing. The importance of this algorithm is based on exploiting the chirp Z-transform technique providing a 2D-Fourier transform of the input signals. The system produces the folded spectrum, accumulating advantages of both space and time integrating. Its frequency bandwidth is practically equal to the bandwidth of transducers inherent in acousto-optical cells. Then, similar processor is able to provide really high frequency resolution, which is practically equal to the reciprocal of the CCD-matrix photo-detector integration time. Here, the current state of developing the triple product acousto-optical processor in frames of the astrophysical instrumentation is shortly discussed.

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“…According to the work of (Klein & Cook, 1967)  is a perturbation of dielectric function by phonons or electric fields. The spectral width of output radiation depends on the geometrical ratio between thinckness of film d (see Fig.…”

Section: Raman Silicon Laser Developmentmentioning

confidence: 99%

Nonlinear Optoelectronic Devices Based on Nanocrystalline Silicon Films: Acoustoelectrical Switches for Optical Modes, Nonliear Optical Switches and Lasers

Milovzorov¹

2011

Nanocrystal

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Unified Approach to Ultrasonic Light Diffraction

Cited by 503 publications

References 14 publications

Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling

Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling

High-Resolution Broadband Millimeter-Wave Astrophysical Spectrometer with Triple Product Acousto-Optical Processor

Nonlinear Optoelectronic Devices Based on Nanocrystalline Silicon Films: Acoustoelectrical Switches for Optical Modes, Nonliear Optical Switches and Lasers

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