C. In, Sangwan Sim, Sungjoon Park, Hyemin Bae, N. Koirala, J. Moon, M. Salehi, Seongshik Oh, Dohun Kim, Hyunyong Choi
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Terahertz investigation of Dirac plasmons and phonon interaction in the topological insulator Bi2Se3 metamaterials
We have measured the terahertz responses of plasmon-phonon interaction in the topological insulator Bi2Se3 metamaterials. Upon photoexcitation, we observed transient phonon stiffening of ∼0.1 THz when the plasmon frequency is above the phonon energy.
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