Science· 2014Q1
Tunable Phonon Polaritons in Atomically Thin van der Waals Crystals of Boron Nitride
- 1,331citations
- Q1SCImago
- 2014year
Short summary
Phonon polariton wavelengths in hexagonal boron nitride (h-BN) can be tuned by changing the crystal thickness, down to a few atomic layers.
AI-generated from the title and abstract; the full text is not read.
Key points
- Surface phonon polaritons were studied in hexagonal boron nitride (h-BN) using infrared nanoimaging.
- The wavelength of polaritonic waves was successfully tuned by varying the number of atomic layers in the h-BN crystals.
- A scaling law governs the polaritonic wave dispersion with crystal thickness, holding true down to a few atomic layers.
- The findings are expected to apply to other polar van der Waals crystals.
AI-generated from the title and abstract; the full text is not read.
Abstract
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.
The authors' abstract, as published at the source. Science, 2014 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Civil and Structural Engineering
Civil and Structural EngineeringEngineering