Frontiers of Optoelectronics, Volume. 14, Issue 2, 229(2021)
Nanoimprint lithography for high-throughput fabrication of metasurfaces
Metasurfaces are composed of periodic subwavelength nanostructures and exhibit optical properties that are not found in nature. They have been widely investigated for optical applications such as holograms, wavefront shaping, and structural color printing, however, electron-beam lithography is not suitable to produce largearea metasurfaces because of the high fabrication cost and low productivity. Although alternative optical technologies, such as holographic lithography and plasmonic lithography, can overcome these drawbacks, such methods are still constrained by the optical diffraction limit. To break through this fundamental problem, mechanical nanopatterning processes have been actively studied in many fields, with nanoimprint lithography (NIL) coming to the forefront. Since NIL replicates the nanopattern of the mold regardless of the diffraction limit, NIL can achieve sufficiently high productivity and patterning resolution, giving rise to an explosive development in the fabrication of metasurfaces. In this review, we focus on various NIL technologies for the manufacturing of metasurfaces. First, we briefly describe conventional NIL and then present various NIL methods for the scalable fabrication of metasurfaces. We also discuss recent applications of NIL in the realization of metasurfaces. Finally, we conclude with an outlook on each method and suggest perspectives for future research on the high-throughput fabrication of active metasurfaces.
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Dong Kyo OH, Taejun LEE, Byoungsu KO, Trevon BADLOE, Jong G. OK, Junsuk RHO. Nanoimprint lithography for high-throughput fabrication of metasurfaces[J]. Frontiers of Optoelectronics, 2021, 14(2): 229
Category: REVIEW ARTICLE
Received: Nov. 11, 2020
Accepted: Feb. 2, 2021
Published Online: Dec. 1, 2021
The Author Email: OK Jong G. (jgok@seoultech.ac.kr)