Sub-cycle valleytronics: control of valley polarization using few-cycle linearly polarized pulses

Jimenez-Galan A, Silva REF, Smirnova O, Ivanov M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Optica Optical Society of America

Book Volume: 8

Pages Range: 277-280

Journal Issue: 3

DOI: 10.1364/OPTICA.404257

Abstract

So far, it has been assumed that selective excitation of a desired valley in the Brillouin zone of a hexagonal two-dimensional material has to rely on using circularly polarized fields. We theoretically demonstrate a way to control the valley excitation in hexagonal 2D materials on a few-femtosecond timescale using a few-cycle, linearly polarized pulse with controlled carrier–envelope phase. The valley polarization is mapped onto the strength of the perpendicular harmonic signal of a weak, linearly polarized pulse, which allows to read this information all-optically without destroying the valley state and without relying on the Berry curvature, making our approach potentially applicable to inversion-symmetric materials. We show applicability of this method to hexagonal boron nitride and MoS2.

Involved external institutions

Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. / Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy

Germany (DE) Universidad Autónoma de Madrid (UAM)

Spain (ES)

How to cite

APA:

Jimenez-Galan, A., Silva, R.E.F., Smirnova, O., & Ivanov, M. (2021). Sub-cycle valleytronics: control of valley polarization using few-cycle linearly polarized pulses. Optica, 8(3), 277-280. https://doi.org/10.1364/OPTICA.404257

MLA:

Jimenez-Galan, Alvaro, et al. "Sub-cycle valleytronics: control of valley polarization using few-cycle linearly polarized pulses." Optica 8.3 (2021): 277-280.

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