X-Ray Optics on a Chip: Guiding X Rays in Curved Channels

Area of Science:

• Optics
• Materials Science
• Physics

Background:

• X-ray optics traditionally rely on large, complex structures.
• Waveguide effects are crucial for manipulating light, but challenging for hard X-rays.
• Curved waveguides offer potential for miniaturization and novel functionalities.

Purpose of the Study:

• To investigate hard X-ray propagation in single curved waveguide channels.
• To determine the limits of waveguide effects at small radii of curvature.
• To explore the potential for integrated X-ray optics on a chip.

Main Methods:

• Studying hard X-ray propagation through single curved X-ray waveguide channels.
• Observing waveguide effects at radii of curvature down to 10 mm.
• Analyzing radiation mode loss and persistence at high deflection angles (up to 30°).

Main Results:

• Observed significant waveguide effects in curved channels with radii as small as 10 mm.
• Demonstrated beam deflection up to 30°, far exceeding the critical angle for total reflection.
• Identified 'survivor' modes that persist despite significant radiation loss into the cladding.

Conclusions:

• Curved X-ray waveguides exhibit robust effects even at small radii, challenging previous assumptions.
• This work paves the way for integrated X-ray optics, enabling compact devices for X-ray pulse manipulation.
• Potential applications include splitting and delaying X-ray pulses for advanced imaging and spectroscopy.