4f-Less Terahertz Optical Pattern Recognition Enabled by Complex Amplitude Modulating Metasurface Through Laser Direct Writing

Zongyuan Wang; Bin Hu; Jingyu Liu; Guocui Wang; Weiguang Liu; Chenjie Xiong; Jianzhou Huang; Juan Liu; Yan Zhang

doi:10.1002/adom.202300575

4f-Less Terahertz Optical Pattern Recognition Enabled by Complex Amplitude Modulating Metasurface Through Laser Direct Writing

Zongyuan Wang, Bin Hu^*, Jingyu Liu, Guocui Wang, Weiguang Liu, Chenjie Xiong, Jianzhou Huang, Juan Liu, Yan Zhang^*

^*Corresponding author for this work

School of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Optical pattern recognition (OPR) has the advantage of single intensity detection ability for low-cost terahertz (THz) systems of imaging or security checks. However, conventional 4f-system-based OPR is limited by the paraxial approximation and bulky device volumes for THz applications. Here, a full-diffraction-based 4f-less OPR method is proposed using a single complex-amplitude-modulating metasurface, which is valid for systems with large Fresnel numbers. Moreover, a laser-induced graphene technique is applied for processing the device. A 15 mm × 15 mm metasurface can be fabricated by one-step laser writing in 34 s, indicating the potential of the proposed method in developing THz OPR systems with miniaturization, fast fabrication, and low-cost.

Original language	English
Article number	2300575
Journal	Advanced Optical Materials
Volume	11
Issue number	19
DOIs	https://doi.org/10.1002/adom.202300575
Publication status	Published - 4 Oct 2023

Keywords

4f-less optical pattern recognition
complex-amplitude modulation
laser direct writing
laser-induced graphene

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10.1002/adom.202300575

Cite this

@article{9ca688fa3189488782196b58a33ac2ba,

title = "4f-Less Terahertz Optical Pattern Recognition Enabled by Complex Amplitude Modulating Metasurface Through Laser Direct Writing",

abstract = "Optical pattern recognition (OPR) has the advantage of single intensity detection ability for low-cost terahertz (THz) systems of imaging or security checks. However, conventional 4f-system-based OPR is limited by the paraxial approximation and bulky device volumes for THz applications. Here, a full-diffraction-based 4f-less OPR method is proposed using a single complex-amplitude-modulating metasurface, which is valid for systems with large Fresnel numbers. Moreover, a laser-induced graphene technique is applied for processing the device. A 15 mm × 15 mm metasurface can be fabricated by one-step laser writing in 34 s, indicating the potential of the proposed method in developing THz OPR systems with miniaturization, fast fabrication, and low-cost.",

keywords = "4f-less optical pattern recognition, complex-amplitude modulation, laser direct writing, laser-induced graphene",

author = "Zongyuan Wang and Bin Hu and Jingyu Liu and Guocui Wang and Weiguang Liu and Chenjie Xiong and Jianzhou Huang and Juan Liu and Yan Zhang",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.",

year = "2023",

month = oct,

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doi = "10.1002/adom.202300575",

language = "English",

volume = "11",

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T1 - 4f-Less Terahertz Optical Pattern Recognition Enabled by Complex Amplitude Modulating Metasurface Through Laser Direct Writing

AU - Wang, Zongyuan

AU - Hu, Bin

AU - Liu, Jingyu

AU - Wang, Guocui

AU - Liu, Weiguang

AU - Xiong, Chenjie

AU - Huang, Jianzhou

AU - Liu, Juan

AU - Zhang, Yan

PY - 2023/10/4

Y1 - 2023/10/4

N2 - Optical pattern recognition (OPR) has the advantage of single intensity detection ability for low-cost terahertz (THz) systems of imaging or security checks. However, conventional 4f-system-based OPR is limited by the paraxial approximation and bulky device volumes for THz applications. Here, a full-diffraction-based 4f-less OPR method is proposed using a single complex-amplitude-modulating metasurface, which is valid for systems with large Fresnel numbers. Moreover, a laser-induced graphene technique is applied for processing the device. A 15 mm × 15 mm metasurface can be fabricated by one-step laser writing in 34 s, indicating the potential of the proposed method in developing THz OPR systems with miniaturization, fast fabrication, and low-cost.

AB - Optical pattern recognition (OPR) has the advantage of single intensity detection ability for low-cost terahertz (THz) systems of imaging or security checks. However, conventional 4f-system-based OPR is limited by the paraxial approximation and bulky device volumes for THz applications. Here, a full-diffraction-based 4f-less OPR method is proposed using a single complex-amplitude-modulating metasurface, which is valid for systems with large Fresnel numbers. Moreover, a laser-induced graphene technique is applied for processing the device. A 15 mm × 15 mm metasurface can be fabricated by one-step laser writing in 34 s, indicating the potential of the proposed method in developing THz OPR systems with miniaturization, fast fabrication, and low-cost.

KW - 4f-less optical pattern recognition

KW - complex-amplitude modulation

KW - laser direct writing

KW - laser-induced graphene

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DO - 10.1002/adom.202300575

M3 - Article

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JF - Advanced Optical Materials

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ER -

4f-Less Terahertz Optical Pattern Recognition Enabled by Complex Amplitude Modulating Metasurface Through Laser Direct Writing

Abstract

Keywords

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