Optical images rotation and reflection with engineered orbital angular momentum spectrum
| Autor: | Xiancong Lu, Wuhong Zhang, Tianzhe Xu, Fangshu Li, Xiaodong Qiu, Lixiang Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Angular momentum Physics and Astronomy (miscellaneous) business.industry Phase (waves) Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Rotation 01 natural sciences 010309 optics symbols.namesake Phase factor Optics Reflection (mathematics) 0103 physical sciences symbols 0210 nano-technology business Doppler effect Beam (structure) Structured light |
| Zdroj: | Applied Physics Letters. 113:161109 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.5043229 |
| Popis: | According to the concept of digital spiral imaging, we reconstruct an arbitrary structured light beam with information based on orbital angular momentum (OAM) eigenstates, i.e., the Laguerre-Gaussian (LG) modes. We propose a method to realize the rotation and reflection of an image by imparting an extra phase factor to each constituent OAM mode. If each OAM mode is added by a time-varying phase, the structured light beams can be manipulated to rotate with a constant speed, similar to a reverse rotational Doppler effect. While making a conjugate transformation to each OAM mode and then adding a constant phase factor to them, the structured light beams can be flipped over along any axis. In experiment, we take two typical patterns, e.g., a smiley face and a letter “e,” to demonstrate the effectiveness of our scheme. The scheme presented in this work may find potential applications in optical micromanipulation and remote sensing. |
| Databáze: | OpenAIRE |
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