Accessing phonon-polaritons in hyperbolic crystals by angle-resolved photoemission spectroscopy

Tomadin, Andrea and Principi, A. and Song, Justin C. W. and Levitov, L. S. and Polini, Marco (2015) Accessing phonon-polaritons in hyperbolic crystals by angle-resolved photoemission spectroscopy. Physical review letters, 115 (8). ISSN 0031-9007

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Abstract

Recently studied hyperbolic materials host unique phonon-polariton (PP) modes. The ultrashort wavelengths of these modes, as well as their low damping, hold promise for extreme subdiffraction nanophotonics schemes. Polar hyperbolic materials such as hexagonal boron nitride can be used to realize long-range coupling between PP modes and extraneous charge degrees of freedom. The latter, in turn, can be used to control and probe PP modes. Here we analyze coupling between PP modes and plasmons in an adjacent graphene sheet, which opens the door to accessing PP modes by angle-resolved photoemission spectroscopy (ARPES). A rich structure in the graphene ARPES spectrum due to PP modes is predicted, providing a new probe of PP modes and their coupling to graphene plasmons.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
129045
Deposited By:
Deposited On:
22 Nov 2018 14:44
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Apr 2020 06:32