Laser-Printed Emissive Metasurface as an Anticounterfeiting Platform

Chanhee Kim, Yeongseon Kim, Dongkyun Kang, Myeongkyu Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Optical security is a promising application of metasurfaces because light has large degrees of freedom in metasurfaces. Although many different structures/materials are proposed for this purpose, the fabrication of dynamic metasurfaces in a straightforward and scalable manner, while maintaining a high security level, remains a significant challenge. Herein, a metasurface consisting of a phase-changing GeSbTe layer and a metal back reflector is presented to space-selectively and dynamically control the infrared emission of the surface by a spatially modulated pulsed laser beam. Unlike conventional laser processes using a focused beam, the employed laser printing is an expanded beam-based parallel process that enables the fabrication of wafer-sized emission patterns. Owing to the multispectral responses of GeSbTe, mutually independent visible and infrared images can be printed in one region. Grayscale emission patterns can also be obtained by gradually modulating the spatial profile of the laser beam, which makes the replication of laser-printed emission patterns extremely difficult. These encouraging features indicate that the presented emissive metasurface has the potential for use as an effective platform for anticounterfeiting.

Original languageEnglish
Article number2200215
JournalLaser and Photonics Reviews
Issue number10
Publication statusPublished - 2022 Oct

Bibliographical note

Funding Information:
This work was supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (Grant Nos. NRF‐2020R1A2C2003575 and NRF‐2022M3H4A1A02046445).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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