High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme

Timo Paschen; Michael Förster; Michael Krüger; Christoph Lemell; Georg Wachter; Florian Libisch; Thomas Madlener; Joachim Burgdörfer; Peter Hommelhoff

doi:https://doi.org/10.1080/09500340.2017.1281453

High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme

Timo Paschen, Michael Förster, Michael Krüger, Christoph Lemell, Georg Wachter, Florian Libisch, Thomas Madlener, Joachim Burgdörfer, Peter Hommelhoff

Research output: Contribution to journal › Article › peer-review

Abstract

In this article, we present coherent control of above-threshold photoemission from a tungsten nanotip achieving nearly perfect modulation. Depending on the pulse delay between fundamental (1560nm) and second harmonic (780nm) pulses of a femtosecond fiber laser at the nanotip, electron emission is significantly enhanced or depressed during temporal overlap. Electron emission is studied as a function of pulse delay, optical near-field intensities, DC bias field and final photoelectron energy. Under optimized conditions modulation amplitudes of the electron emission of 97.5% are achieved. Experimental observations are discussed in the framework of quantum-pathway interference supported by local density of states simulations.

Original language	English
Pages (from-to)	1054-1060
Number of pages	7
Journal	Journal of Modern Optics
Volume	64
Issue number	10-11
DOIs	https://doi.org/10.1080/09500340.2017.1281453
State	Published - 1 Jul 2017
Externally published	Yes

Keywords

Density functional theory
Electron emitter
Nanotip
Two-color laser field

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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https://doi.org/10.1080/09500340.2017.1281453

Cite this

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title = "High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme",

abstract = "In this article, we present coherent control of above-threshold photoemission from a tungsten nanotip achieving nearly perfect modulation. Depending on the pulse delay between fundamental (1560nm) and second harmonic (780nm) pulses of a femtosecond fiber laser at the nanotip, electron emission is significantly enhanced or depressed during temporal overlap. Electron emission is studied as a function of pulse delay, optical near-field intensities, DC bias field and final photoelectron energy. Under optimized conditions modulation amplitudes of the electron emission of 97.5% are achieved. Experimental observations are discussed in the framework of quantum-pathway interference supported by local density of states simulations.",

keywords = "Density functional theory, Electron emitter, Nanotip, Two-color laser field",

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doi = "https://doi.org/10.1080/09500340.2017.1281453",

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T1 - High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme

AU - Paschen, Timo

AU - Förster, Michael

AU - Krüger, Michael

AU - Lemell, Christoph

AU - Wachter, Georg

AU - Libisch, Florian

AU - Madlener, Thomas

AU - Burgdörfer, Joachim

AU - Hommelhoff, Peter

PY - 2017/7/1

Y1 - 2017/7/1

N2 - In this article, we present coherent control of above-threshold photoemission from a tungsten nanotip achieving nearly perfect modulation. Depending on the pulse delay between fundamental (1560nm) and second harmonic (780nm) pulses of a femtosecond fiber laser at the nanotip, electron emission is significantly enhanced or depressed during temporal overlap. Electron emission is studied as a function of pulse delay, optical near-field intensities, DC bias field and final photoelectron energy. Under optimized conditions modulation amplitudes of the electron emission of 97.5% are achieved. Experimental observations are discussed in the framework of quantum-pathway interference supported by local density of states simulations.

AB - In this article, we present coherent control of above-threshold photoemission from a tungsten nanotip achieving nearly perfect modulation. Depending on the pulse delay between fundamental (1560nm) and second harmonic (780nm) pulses of a femtosecond fiber laser at the nanotip, electron emission is significantly enhanced or depressed during temporal overlap. Electron emission is studied as a function of pulse delay, optical near-field intensities, DC bias field and final photoelectron energy. Under optimized conditions modulation amplitudes of the electron emission of 97.5% are achieved. Experimental observations are discussed in the framework of quantum-pathway interference supported by local density of states simulations.

KW - Density functional theory

KW - Electron emitter

KW - Nanotip

KW - Two-color laser field

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DO - https://doi.org/10.1080/09500340.2017.1281453

M3 - مقالة

SN - 0950-0340

VL - 64

SP - 1054

EP - 1060

JO - Journal of Modern Optics

JF - Journal of Modern Optics

IS - 10-11

ER -

High visibility in two-color above-threshold photoemission from tungsten nanotips in a coherent control scheme

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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