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In article number 1703878, Jie Yao, Junqiao Wu, and co‐workers demonstrate a lithography‐free, rewritable metacanvas, on which nearly arbitrary metaphotonic devices can be rapidly and repeatedly written and erased. The writing is performed with a low‐power laser. The metacanvas opens up possibilities where photonic elements can be field‐programmed to deliver dynamic, complex, and system‐level functionalities...
The unique correspondence between mathematical operators and photonic elements in wave optics enables quantitative analysis of light manipulation with individual optical devices. Phase‐transition materials are able to provide real‐time reconfigurability of these devices, which would create new optical functionalities via (re)compilation of photonic operators, as those achieved in other fields such...
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