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Coherent Electron Trajectory Control in Graphene.

Christian Heide1, Takuya Higuchi1, Heiko B Weber2

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Summary
This summary is machine-generated.

We control electron motion in graphene using two laser pulses. This allows precise manipulation of electron trajectories and suppression of quantum interference, achieved with a simple laser system.

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Area of Science:

  • Solid State Physics
  • Quantum Optics
  • Materials Science

Background:

  • Coherent electron dynamics in two-dimensional materials are crucial for next-generation electronics.
  • Previous work demonstrated quantum path interference in graphene using linearly polarized laser pulses.

Purpose of the Study:

  • To investigate coherent electron dynamics in graphene driven by two orthogonally polarized laser pulses.
  • To explore the control of electron trajectories in graphene's reciprocal space.
  • To demonstrate a method for suppressing quantum path interference using tailored laser waveforms.

Main Methods:

  • Interaction of graphene with two few-cycle laser pulses with orthogonal polarization.
  • Control of electron dynamics via the relative delay and phase between the laser pulses.
  • Exploration of electron trajectories in the two-dimensional reciprocal space of graphene.

Main Results:

  • The relative pulse delay acts as a control parameter for electron trajectories.
  • Electron trajectories can be deformed to suppress quantum path interference.
  • Complex matter wave manipulation is achieved using a high repetition rate laser oscillator.

Conclusions:

  • Orthogonally polarized laser pulses offer precise control over electron dynamics in graphene.
  • Quantum path interference can be suppressed by manipulating electron trajectories.
  • This technique provides a cost-effective alternative to complex amplified laser systems for strong-field control.