X-Ray Optics

Guiding x-rays on a chip

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Science  04 Dec 2015:
Vol. 350, Issue 6265, pp. 1218-1219
DOI: 10.1126/science.350.6265.1218-e

For visible, infrared, and ultraviolet wavelengths of light, the ability to guide the light is very well served by a variety of mature platforms such as waveguides, optic fibers, and photonic crystals. Going to shorter wavelengths such as x-rays, however, provides a formidable challenge, because the light is penetrating and readily escapes attempts at confinement. By fabricating engineered channels in a layer of tantalum using electron beam lithography, Salditt et al. demonstrate the ability to guide hard x-rays in the curved waveguides and show that they can do so with channels of surprisingly small radii of curvature. The demonstration shows the possibility of extending the functionality of integrated optics to the x-ray regime.

Phys. Rev. Lett. 115, 203902 (2015).

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