Tunable phonon polaritons in atomically thin van der Waals crystals of boron nitride.
نویسندگان
چکیده
van der Waals heterostructures assembled from atomically thin crystalline layers of diverse two-dimensional solids are emerging as a new paradigm in the physics of materials. We used infrared nanoimaging to study the properties of surface phonon polaritons in a representative van der Waals crystal, hexagonal boron nitride. We launched, detected, and imaged the polaritonic waves in real space and altered their wavelength by varying the number of crystal layers in our specimens. The measured dispersion of polaritonic waves was shown to be governed by the crystal thickness according to a scaling law that persists down to a few atomic layers. Our results are likely to hold true in other polar van der Waals crystals and may lead to new functionalities.
منابع مشابه
Tunable Phonon Polaritons in Atomically Thin van der Waals Crystals
, 1125 (2014); 343 Science et al. S. Dai of Boron Nitride Tunable Phonon Polaritons in Atomically Thin van der Waals Crystals This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to rep...
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ورودعنوان ژورنال:
- Science
دوره 343 6175 شماره
صفحات -
تاریخ انتشار 2014