AI Article Synopsis
- The study presents a mechanical crystal that can have its defect mode altered using light, allowing for precise control over its properties.
- By applying an optical spring to a specific part of a phononic crystal membrane, the researchers were able to effectively move a mechanical mode into a band gap, concentrating its effect to a smaller area within the crystal.
- This technique offers a rapid and reversible method for engineering mechanical defects, providing the ability to reconfigure the crystal's properties on the spot.
Article Abstract
We demonstrate a mechanical crystal with an optically programmable defect mode. By applying an optical spring to a single unit cell of a phononic crystal membrane, we smoothly transfer a single mechanical mode into the band gap, thereby localizing its spatial profile from one spanning the entire crystal to one confined within a few unit cells. This localization is evidenced by an enhanced mechanical frequency shift commensurate with a 37-fold reduction in the mode's participating mass. This fast, reversible, all-optical control represents a qualitatively new way to engineer mechanical defects, advantageously with in situ reconfigurability.
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| http://dx.doi.org/10.1103/PhysRevLett.133.226904 | DOI Listing |
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