Acoustic plasmonics of Au grating/Bi<sub>2</sub>Se<sub>3</sub> thin film/sapphire hybrid structures

Acoustic plasmonics of Au grating/Bi₂Se₃ thin film/sapphire hybrid structures

Li Weiwu¹, Riegel Konstantin¹, Liu Chuanpu², Taskin Alexey³, Ando Yoichi³, Liao Zhimin², Dressel Martin¹, Yan Yuan^{1, 4, 5, †}

The reflectivity of the Ref-sample (a) and the TI-sample (b) with various grating widths in the spectral range from 540 cm⁻¹ to 650 cm⁻¹. (c) Comparison of resonant frequencies as a function of the grating width for Ref-sample and TI-sample.