Paper 13383-8
Paper 13383-8
Accelerating complex wavefront shaping with line-scanning holography using digital micromirror devices (Invited Paper)
29 January 2025 • 10:50 AM - 11:20 AM PST | Moscone South, Room 206 (Level 2)
Abstract
Digital micromirror devices (DMDs) allow for complex wavefront shaping with their unique advantage of modulation speeds reaching up to a few tens of kilohertz. Here, we have developed a method called the fast line-scanning amplitude-encoded scattering-assisted holography (FLASH) technique to further increase the speed of complex wavefront shaping by three orders of magnitude using a DMD. By converting spatial degrees of freedom into temporal degrees of freedom, the FLASH technique achieves three-dimensional control of micron-sized foci at a speed of 30 MHz, though at the cost of focal contrast. Potential applications include 3D laser-scanning microscopy, laser micromachining, and high-speed beam scanning.
Presenter
Moosoek Jang
KAIST (Korea, Republic of)
Mooseok Jang earned his PhD degree in electrical engineering from the California Institute of Technology (Caltech), Pasadena, California, in 2016 under the guidance of Changhuei Yang. He is an associate professor of the Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), South Korea. His main research interest lies in ‘solving’ and ‘using’ a disordered optical system. He has taken a leading role in the pioneering works of digital optical phase conjugation – a complex wavefront shaping method to focus light through a disordered medium. In ‘using’ optical complexity, he proposed for the first time the concept of engineered-disorder based on the metasurface platform that overcomes the conventional paradigm based on traditional optics such as lens and grating. Now, his research group works at the junction of optical imaging, complex optics, acousto-optics, and computational techniques for imaging.