Strong-field theory of attosecond tunneling microscopy
arxiv(2023)
摘要
Attosecond observations of coherent electron dynamics in molecules and
nanostructures can be achieved by combining conventional scanning tunneling
microscopy (STM) with ultrashort femtosecond laser pulses. While experimental
studies in the sub-cycle regime are underway, a robust strong-field theory
description has remained elusive. Here we devise a model based on the
strong-field approximation. Valid in all regimes, it provides a surprising
analogy to the standard model of STM. We also show that the intuitive
three-step model of attosecond science directly emerges from our model and
describe the optimal conditions for attosecond STM experiments.
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