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Frequency conversion of structured light

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10.1038/srep21390
 
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hdl:2117/102277

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Steinlechner, Fabian
Hermosa, Nathaniel
Pruneri, Valerio
Pérez Torres, JuanMés informacióMés informacióMés informació
Document typeArticle
Defense date2016-02-15
PublisherMacmillan Publishers
Rights accessOpen Access
Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain
Abstract
Coherent frequency conversion of structured light, i.e. the ability to manipulate the carrier frequency of a wave front without distorting its spatial phase and intensity profile, provides the opportunity for numerous novel applications in photonic technology and fundamental science. In particular, frequency conversion of spatial modes carrying orbital angular momentum can be exploited in sub-wavelength resolution nano-optics and coherent imaging at a wavelength different from that used to illuminate an object. Moreover, coherent frequency conversion will be crucial for interfacing information stored in the high-dimensional spatial structure of single and entangled photons with various constituents of quantum networks. In this work, we demonstrate frequency conversion of structured light from the near infrared (803¿nm) to the visible (527¿nm). The conversion scheme is based on sum-frequency generation in a periodically poled lithium niobate crystal pumped with a 1540-nm Gaussian beam. We observe frequency-converted fields that exhibit a high degree of similarity with the input field and verify the coherence of the frequency-conversion process via mode projection measurements with a phase mask and a single-mode fiber. Our results demonstrate the suitability of exploiting the technique for applications in quantum information processing and coherent imaging.
CitationSteinlechner, F., Hermosa, N., Pruneri, V., J. P. T. Frequency conversion of structured light. "Scientific reports", 15 Febrer 2016, vol. 6, núm. 21390, p. 1-8. 
URIhttp://hdl.handle.net/2117/102277
DOI10.1038/srep21390
ISSN2045-2322
Publisher versionhttp://www.nature.com/articles/srep21390
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