Electromagnetic reprogrammable coding-metasurface holograms

By Lianlin Li, Tie Jun Cui, Wei Ji, Shuo Liu, Jun Ding, Xiang Wan, Yun Bo Li, Menghua Jiang, Cheng-Wei Qiu, Shuang Zhang. Nature Communications, 2017

1,001 citations recorded by the source corpus.

Metasurfaces have enabled a plethora of emerging functions within an ultrathin dimension, paving way towards flat and highly integrated photonic devices. Despite the rapid progress in this area, simultaneous realization of reconfigurability, high efficiency, and full control over the phase and amplitude of scattered light is posing a great challenge. Here, we try to tackle this challenge by introducing the concept of a reprogrammable hologram based on 1-bit coding metasurfaces. The state of each unit cell of the coding metasurface can be switched between ‘1’ and ‘0’ by electrically controlling the loaded diodes. Our proof-of-concept experiments show that multiple desired holographic images can be realized in real time with only a single coding metasurface. The proposed reprogrammable hologram may be a key in enabling future intelligent devices with reconfigurable and programmable functionalities that may lead to advances in a variety of applications such as microscopy, display, security, data storage, and information processing. Realizing metasurfaces with reconfigurability, high efficiency, and control over phase and amplitude is a challenge. Here, Li et al. introduce a reprogrammable hologram based on a 1-bit coding metasurface, where the state of each unit cell of the coding metasurface can be switched electrically.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/531e4b3b95972cecb6c23f9947c4baeb4c3e2f2a

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Citations in the corpus

Metasurface holography: from fundamentals to applications (2018, background): “ically controlling the loaded diodes. Consequently, the binary amplitude holograms can be reprogrammed through digitalization. The reconfiguration time is completely determined by the FPGA clock rate [102]. Such reprogrammable metasurface holograms can be readily extended to exhibit multiple bits an”
Intelligent Metasurfaces with Continuously Tunable Local Surface Impedance for Multiple Reconfigurable Functions (2018, methodology): “This approach enables us to achieve more exotic functionalities such as beam steering, focusing, imaging, and holography [17, 23, 31–33].”
Tunable metasurfaces towards versatile metalenses and metaholograms: a review (2022, methodology): “An electromagnetic reprogrammable hologram device exploits 1-bit coding of the diodes on the metasurfaces.(154) Additionally, a conducting polymer and polyaniline can be used to electrochemically control a metaholographic device.”
Weighted Sum-Rate Maximization for Reconfigurable Intelligent Surface Aided Wireless Networks (2019, background): “RECONFIGURABLE intelligent surface (RIS), also known as intelligent reflection surface, is an artificial structure consisting of passive radio elements, each of which could adjust the reflection of the incident electromagnetic waves with unnatural properties [1]–[7].”
Addressable metasurfaces for dynamic holography and optical information encryption (2018, background): “In addition, electrically tunable metasurface holograms have been demonstrated at microwave frequencies( 21 ).”