Second-harmonic generation in monolithic lithium niobate metasurfaces

Carletti L, Li C, Sautter J, Staude I, De Angelis C, Li T, Neshev DN (2019)

Publication Type: Conference contribution

Publication year: 2019

Publisher: Institute of Electrical and Electronics Engineers Inc.

Conference Proceedings Title: 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019

Event location: Munich, DEU

ISBN: 9781728104690

DOI: 10.1109/CLEOE-EQEC.2019.8872706

Abstract

Second harmonic generation (SHG) in nonlinear metasurfaces has proven as a versatile tool for novel ultra-thin light sources with engineered spatial wavefronts. However, the availability of second-order nonlinear materials suitable for fabrication of such metasurfaces has so far been mainly limited to III-V semiconductors (e.g. GaAs, AlGaAs, GaP). Such systems have a limited transparency range and unusual off-diagonal second-order susceptibility tensors. These constraints have driven the search for new material platforms, including lithium niobate as one of the most promising nonlinear materials. Various approaches, such as plasmonic cavities [1], bottom-up techniques [2] and lithium niobate on insulator [3], have been recently explored, however with limited applicability. Here we propose a new design concept for second-order nonlinear metasurfaces on a monolithic substrate, which is not limited by the availability of thin crystalline films and can be applied to any non-centrosymmetric material. Our approach enables blue SHG from a monolithic lithium niobate metasurface with a conversion efficiency above 10∼5 using 1 GW/cm2 pump intensity, opening new opportunities for practical designs of nonlinear metasurfaces.

Involved external institutions

Università degli Studi di Brescia IT Italy (IT) Australian National University (ANU) AU Australia (AU) Friedrich-Schiller-Universität Jena DE Germany (DE)

How to cite

APA:

Carletti, L., Li, C., Sautter, J., Staude, I., De Angelis, C., Li, T., & Neshev, D.N. (2019). Second-harmonic generation in monolithic lithium niobate metasurfaces. In 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019. Munich, DEU: Institute of Electrical and Electronics Engineers Inc..

MLA:

Carletti, Luca, et al. "Second-harmonic generation in monolithic lithium niobate metasurfaces." Proceedings of the 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019, Munich, DEU Institute of Electrical and Electronics Engineers Inc., 2019.

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