Ultrafast and coupled: Atomic vibrations in the quantum material boron nitride

Materials consisting of a few atomic layers display properties determined by quantum physics. In a stack of such layers, vibrations of the atoms can be triggered by infrared light. New experimental and theoretical work shows that atomic vibrations within the layers of hexagonal boron nitride, the so-called transverse optical phonons, couple directly to motions of the layers against each other. For a period of some 20 ps, the coupling results in a frequency down-shift of the optical phonons and their optical resonance. This behavior is a genuine property of the quantum material and of interest for applications in high-frequency optoelectronics.

Symmetry breaking by ultrashort light pulses opens new quantum pathways for coherent phonons

Impact of Atomic Coating on Thermal Conductivity of Nano Materials

Ultrafast and coupled -- atomic vibrations in

Nanomaterials, Free Full-Text

LUI Lab

Coatings, Free Full-Text

Electronic Materials, Free Full-Text

Forschungsverbund Berlin e.V. - News

Researchers observe localized phonon modes at a heterointerface

Phase-controlled ultrafast nanoimaging of insulator-to-metal transition