Carrier-envelope phase control of ultrafast photocurrents in layered MoS$_2$

TL;DR

This study demonstrates the control of ultrafast photocurrents in layered MoS$_2$ using carrier-envelope phase of few-cycle laser pulses, revealing perturbative dynamics and expanding light-field-sensitive electronics to 2D materials.

Contribution

It introduces CEP-controlled photocurrents in layered MoS$_2$, showing their quadratic scaling and perturbative behavior, which extends current light-field control techniques to 2D transition-metal dichalcogenides.

Findings

Photocurrents scale quadratically with field amplitude.

Photocurrents are driven by few-cycle laser pulses.

Perturbative carrier dynamics observed in MoS$_2$.

Abstract

We demonstrate carrier-envelope-phase (CEP)-controlled photocurrents in mono-, bi-, and tri-layer MoS$_2$ driven by few-cycle laser pulses. The photocurrent in the two-terminal devices scales quadratically with the field amplitude, indicating perturbative carrier dynamics in the weak-field regime distinct from strong-field tunnelling. Our results extend light-field-sensitive current control from bulk dielectrics, semiconductors, and graphene to two-dimensional transition-metal dichalcogenides, highlighting their potential for electric-field sensitive optoelectronics.