Fabrication of ultra-thin single crystal diamond membrane by using laser ablation
ADVANCES IN X-RAY/EUV OPTICS AND COMPONENTS XVII(2022)
Abstract
We present fabrication and characterization of ultra-thin with similar to 15-25 mu m thick (300 mu m in diameter) diamond single-crystal membranes for various applications in synchrotron radiation sources, x-ray free-electron lasers (XFELs), and XFEL oscillators. Ultra-thin diamond single-crystal membranes are fabricated using laser ablation techniques with ultra-short (femtosecond) laser pulses. Here, we report optimizing the laser ablation parameters such as fluence, power, repetition rate, pulse length, and wavelengths. The crystal quality of the ultra-thin diamond membranes has been characterized by x-ray rocking curve imaging (RCI) of the crystal before and after laser ablation and subsequent high-temperature annealing.
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Key words
X-ray optics, diamond crystal, ultra-thin membrane, strain-free crystals, laser ablation
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