Spatially modulated thermal light in atomic medium for enhanced ghost imaging

Recent years have seen vast progress in image modulation based on atomic media, with potential applications in both classical optical imaging and quantum imaging regions. However, there have been few investigations of how thermal light images interact with an electromagnetically induced transparent...

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Bibliographic Details
Published in:Scientific reports 2017-08, Vol.7 (1), p.8015-7, Article 8015
Main Authors: Cao, Mingtao, Wang, Jinwen, Yang, Xin, Qiu, Shuwei, Gao, Hong, Li, Fuli
Format: Article
Language:English
Subjects:
639/624
639/766/483/481
Cameras
Experiments
Humanities and Social Sciences
Image processing
Light
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Recent years have seen vast progress in image modulation based on atomic media, with potential applications in both classical optical imaging and quantum imaging regions. However, there have been few investigations of how thermal light images interact with an electromagnetically induced transparent medium. In this letter, we experimentally demonstrate pseudo-thermal light modulation on coherent population trapping conditions in 87 Rb vapor. By introducing the Laguerre-Gaussian beam as the control beam and the encoded speckle as the probe beam, we obtained sharper speckle patterns after the atom cell compared with that in free space. The spatially modulated thermal light was then used to enhance the image resolution in ghost imaging of which the resolution was enhanced by factor 3, since the ghost image resolution is heavily reliant on the speckle’s transverse coherent length. Our results are promising for potential applications in high resolution ghost imaging and image metrology, image processing and biomedical imaging.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-08374-3