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Proceedings Paper

Multifunctional vacuum ultraviolet nonlinear metadevice (Conference Presentation)
Author(s): Ming Lun Tseng; Michael Semmlinger; Jian Yang; Ming Zhang; Chao Zhang; Din Ping Tsai; Peter Nordlander; Naomi J. Halas

Paper Abstract

Vacuum ultraviolet (VUV) light is electromagnetic radiation in the wavelength regime between 100nm and 200nm. Due to its high photon energy, VUV light is very important in many advanced applications, such as photochemistry, nanolithography, and novel spectroscopy. While several methods to generate coherent VUV light have been developed, a multifunctional nanophotonic device for efficient VUV light generation and control still remains an outstanding challenge. In this work, we demonstrate an all-dielectric metasurface device (metadevice) which can be used for nonlinearly generating coherent VUV light. Metasurfaces are artificial nanostructures with resonance properties that can be designed by carefully tailoring their geometric parameters. The metadevice demonstrated in this work consists of an array ZnO nano-resonators. To fabricate the metadevice, a 150-nm multicrystalline ZnO was nanopatterned using a focus ion beam system. In the linear transmission measurement, the metadevice shows a resonance dip at around 400nm. This resonance was found to be associated to a magnetic dipole resonance of the nano-resonators. When a visible femtosecond laser beam (wavelength: 394nm) as an excitation source was loosely focused on the metadevice, VUV light originating from second harmonic generation of the metadevice was produced. The dependence of the VUV signal on the excitation power as well as on the incident angle were carefully measured and analyzed. Furthermore, manipulation of the output VUV wavefront was realized by carefully controlling the nano-resonator arrangement. This work paves a novel route toward high-efficiency multifunctional nanophotonic devices for VUV applications [Nano Lett. 18, 5738 (2018)].

Paper Details

Date Published: 9 September 2019
Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110800G (9 September 2019); doi: 10.1117/12.2526710
Show Author Affiliations
Ming Lun Tseng, Research Ctr. for Applied Sciences (Taiwan)
Michael Semmlinger, Rice Univ. (United States)
Jian Yang, Rice Univ. (United States)
Ming Zhang, Rice Univ. (United States)
Chao Zhang, Rice Univ. (United States)
Din Ping Tsai, Research Ctr. for Applied Sciences (Taiwan)
Peter Nordlander, Rice Univ. (United States)
Naomi J. Halas, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 11080:
Metamaterials, Metadevices, and Metasystems 2019
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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