TY - JOUR
T1 - Phase-Change Hyperbolic Heterostructures for Nanopolaritonics
T2 - A Case Study of hBN/VO 2
AU - Dai, Siyuan
AU - Zhang, Jiawei
AU - Ma, Qiong
AU - Kittiwatanakul, Salinporn
AU - McLeod, Alex
AU - Chen, Xinzhong
AU - Corder, Stephanie Gilbert
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Lu, Jiwei
AU - Dai, Qing
AU - Jarillo-Herrero, Pablo
AU - Liu, Mengkun
AU - Basov, D. N.
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/5/3
Y1 - 2019/5/3
N2 - Unlike conventional plasmonic media, polaritonic van der Waals (vdW) materials hold promise for active control of light–matter interactions. The dispersion relations of elementary excitations such as phonons and plasmons can be tuned in layered vdW systems via stacking using functional substrates. In this work, infrared nanoimaging and nanospectroscopy of hyperbolic phonon polaritons are demonstrated in a novel vdW heterostructure combining hexagonal boron nitride (hBN) and vanadium dioxide (VO 2 ). It is observed that the insulator-to-metal transition in VO 2 has a profound impact on the polaritons in the proximal hBN layer. In effect, the real-space propagation of hyperbolic polaritons and their spectroscopic resonances can be actively controlled by temperature. This tunability originates from the effective change in local dielectric properties of the VO 2 sublayer in the course of the temperature-tuned insulator-to-metal phase transition. The high susceptibility of polaritons to electronic phase transitions opens new possibilities for applications of vdW materials in combination with strongly correlated quantum materials.
AB - Unlike conventional plasmonic media, polaritonic van der Waals (vdW) materials hold promise for active control of light–matter interactions. The dispersion relations of elementary excitations such as phonons and plasmons can be tuned in layered vdW systems via stacking using functional substrates. In this work, infrared nanoimaging and nanospectroscopy of hyperbolic phonon polaritons are demonstrated in a novel vdW heterostructure combining hexagonal boron nitride (hBN) and vanadium dioxide (VO 2 ). It is observed that the insulator-to-metal transition in VO 2 has a profound impact on the polaritons in the proximal hBN layer. In effect, the real-space propagation of hyperbolic polaritons and their spectroscopic resonances can be actively controlled by temperature. This tunability originates from the effective change in local dielectric properties of the VO 2 sublayer in the course of the temperature-tuned insulator-to-metal phase transition. The high susceptibility of polaritons to electronic phase transitions opens new possibilities for applications of vdW materials in combination with strongly correlated quantum materials.
KW - hexagonal boron nitride
KW - phase-change materials
KW - polaritons
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U2 - 10.1002/adma.201900251
DO - 10.1002/adma.201900251
M3 - Article
C2 - 30907483
AN - SCOPUS:85063357597
SN - 0935-9648
VL - 31
JO - Advanced Materials
JF - Advanced Materials
IS - 18
M1 - 1900251
ER -