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Updated: Jan 20, 2026
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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
9.6K
Revisiting the Photon-Drag Effect in Metal Films
Jared H Strait1, Glenn Holland1, Wenqi Zhu1,2
1Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Physical Review Letters
|September 7, 2019
Summary
The photon-drag effect in gold is influenced by adsorbed molecules, contrary to prior assumptions. This study reveals the effect
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- The photon-drag effect is a sensitive probe of radiation pressure mechanisms.
- Gold, as a canonical Drude metal, is a key material for studying light-matter interactions.
Purpose of the Study:
- To re-examine the photon-drag effect in gold.
- To investigate the influence of adsorbed molecules on the photon-drag signal.
- To clarify the intrinsic sign of the photon-drag effect.
Main Methods:
- Experimental investigation of the photon-drag effect in gold.
- Utilizing p-polarized light illumination in ambient air.
- Analysis of signal changes due to adsorbed molecules.
Main Results:
- The photon-drag signal in gold is sensitive to adsorbed molecules in ambient air, affecting both sign and magnitude.
- Previous measurements using this effect may require reinterpretation.
- The intrinsic sign of the photon-drag effect contradicts the intuitive model of direct momentum transfer to free electrons.
Conclusions:
- Adsorbed molecules play a significant role in the observed photon-drag effect in gold.
- A revised understanding of the photon-drag effect is needed, moving beyond simple momentum transfer models.
- This work opens new avenues for utilizing the photon-drag effect as a sensitive surface probe.
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