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Yingjun Cheng on Muck Rack

Yingjun Cheng

As seen in: Optica
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Articles

Re-revealing dark-field scanning imaging via modal decomposition of bright-field light in the OAM domain

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By Enxi Zhao, Yunlong Du, Yingjun Cheng, Yuhua Zhuo
| Optica Verified
An alternative dark-field (DF) scanning imaging is re-revealed via modal decomposition of the bright-field (BF) light in the orbital angular momentum (OAM) domain. A Gaussian beam containing only the zeroth-order OAM mode illuminates the surface. The BF light scattered from the surface carries the phase shift induced by the surface feature and then diffracts into a distorted light field, which is a coherent sum of the different OAM modes.
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