Reconfigurable hyperbolic polaritonics with correlated oxide metasurfaces

Neda Alsadat Aghamiri, Guangwei Hu, Alireza Fali, Zhen Zhang, Jiahan Li, Sivacarendran Balendhran, Sumeet Walia, Sharath Sriram, James H. Edgar, Shriram Ramanathan, Andrea Alù and Yohannes Abate ()
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Neda Alsadat Aghamiri: University of Georgia
Guangwei Hu: City University of New York
Alireza Fali: University of Georgia
Zhen Zhang: Purdue University
Jiahan Li: Kansas State University
Sivacarendran Balendhran: University of Melbourne
Sumeet Walia: School of Engineering RMIT University Melbourne
Sharath Sriram: Functional Materials and Microsystems Research Group and the Micro Nano Research Facility RMIT University
James H. Edgar: Kansas State University
Shriram Ramanathan: Purdue University
Andrea Alù: City University of New York
Yohannes Abate: University of Georgia

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Polaritons enable subwavelength confinement and highly anisotropic flows of light over a wide spectral range, holding the promise for applications in modern nanophotonic and optoelectronic devices. However, to fully realize their practical application potential, facile methods enabling nanoscale active control of polaritons are needed. Here, we introduce a hybrid polaritonic-oxide heterostructure platform consisting of van der Waals crystals, such as hexagonal boron nitride (hBN) or alpha-phase molybdenum trioxide (α-MoO3), transferred on nanoscale oxygen vacancy patterns on the surface of prototypical correlated perovskite oxide, samarium nickel oxide, SmNiO3 (SNO). Using a combination of scanning probe microscopy and infrared nanoimaging techniques, we demonstrate nanoscale reconfigurability of complex hyperbolic phonon polaritons patterned at the nanoscale with high resolution. Hydrogenation and temperature modulation allow spatially localized conductivity modulation of SNO nanoscale patterns, enabling robust real-time modulation and nanoscale reconfiguration of hyperbolic polaritons. Our work paves the way towards nanoscale programmable metasurface engineering for reconfigurable nanophotonic applications.

Date: 2022
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DOI: 10.1038/s41467-022-32287-z

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