personking |
2022-09-16 10:39 |
The research team invented a novel non-reciprocal femtosecond laser polarization ferroelectric domain technology. The femtosecond pulse laser is focused on the inside of lithium niobate crystal. By controlling the direction of laser movement, an effective electric field is formed inside the crystal, and the 3D structure can be directly written and erased z<s~` This new technology breaks through the optical diffraction limit of traditional femtosecond laser, and reduces the size of the three-dimensional structure of lithium niobate from the traditional 1 micron (equivalent to one-fiftieth of a human hair) to the nanoscale for the first time, reaching 30 nanometers, greatly improving the processing accuracy
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