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Holographic Technique Traps Irregularly Shaped Microscopic Objects

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An optical manipulation technique that can securely control the position, orientation and shape of non-spherical microscopic samples, such as living cells, could have direct applications in biophotonics and soft matter physics. Most experiments using optical tweezers have focused on trapping spherical particles, where the optical forces and responding motion of microspheres can be easily predicted based on physical principles. However, when this method is used for trapping objects with complicated shapes, it can induce unstable motion in the particles and provide only limited control of...Read full article

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