Angular dependency of spatial frequency modulation in diffusion media
- URL: http://arxiv.org/abs/2206.12580v1
- Date: Sat, 25 Jun 2022 07:06:42 GMT
- Title: Angular dependency of spatial frequency modulation in diffusion media
- Authors: Yun Chen, Chengyuan Wang, Zibin Jiang, Wei Zhang, Zehao Shen, Hong
Gao, Fuli Li
- Abstract summary: The angular deviation between the control and probe beams could be utilized as a degree of freedom to modulate the SF of the probe beam.
Our findings could be broadly applied to the fields of quantum information processing, all-optical image manipulation and imaging through diffusive media.
- Score: 7.481044907091694
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: An optical field will undergo coherent diffusion when it is mapped into
thermal-motioned atoms, e.g., in a slow or storage light process. As was
demonstrated before, such diffusion effect is equivalent to a spatial low-pass
filter attenuating the high spatial frequency (SF) components of the optical
field. Here, employing electromagnetically induced transparency (EIT) based
light storage in hot atomic vapor, we demonstrate that the angular deviation
between the control and probe beams could be utilized as a degree of freedom to
modulate the SF of the probe beam. The principle is to change the
diffusion-induced low-pass filter into a band-pass filter, whose SF response
can be tuned by varying the direction and magnitude of the angular deviation.
Transverse multimode light fields, such as optical images and Laguerre-Gaussian
modes are utilized to study such SF modulation. Our findings could be broadly
applied to the fields of quantum information processing, all-optical image
manipulation and imaging through diffusive media.
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