Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum

Tenio Popmintchev; Ming Chang Chen; Alon Bahabad; Michael Gerrity; Pavel Sidorenko; Oren Cohen; Ivan P. Christov; Margaret M. Murnane; Henry C. Kapteyn

doi:10.1073/pnas.0903748106

Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum

Tenio Popmintchev, Ming Chang Chen, Alon Bahabad, Michael Gerrity, Pavel Sidorenko, Oren Cohen, Ivan P. Christov, Margaret M. Murnane, Henry C. Kapteyn

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

329 Scopus citations

Abstract

We show how bright, tabletop, fully coherent hard X-ray beams can be generated through nonlinear upconversion of femtosecond laser light. By driving the high-order harmonic generation process using longer-wavelength midinfrared light, we show that, in theory, fully phase-matched frequency upconversion can extend into the hard X-ray region of the spectrum. We verify our scaling predictions experimentally by demonstrating phase matching in the soft X-ray region of the spectrum around 330 eV, using ultrafast driving laser pulses at 1.3-μm wavelength, in an extended, high-pressure, weakly ionized gas medium. We also show through calculations that scaling of the overall conversion efficiency is surprisingly favorable as the wavelength of the driving laser is increased, making tabletop, fully coherent, multi-keV X-ray sources feasible. The rapidly decreasing microscopic single-atom yield, predicted for harmonics driven by longer-wavelength lasers, is compensated macroscopically by an increased optimal pressure for phase matching and a rapidly decreasing reabsorption of the generated X-rays.

Original language	English
Pages (from-to)	10516-10521
Number of pages	6
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	106
Issue number	26
DOIs	https://doi.org/10.1073/pnas.0903748106
State	Published - 30 Jun 2009
Externally published	Yes

Keywords

Coherent
Extreme nonlinear optics
Ultrafast

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10.1073/pnas.0903748106

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Popmintchev, T., Chen, M. C., Bahabad, A., Gerrity, M., Sidorenko, P., Cohen, O., Christov, I. P., Murnane, M. M., & Kapteyn, H. C. (2009). Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum. Proceedings of the National Academy of Sciences of the United States of America, 106(26), 10516-10521. https://doi.org/10.1073/pnas.0903748106

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abstract = "We show how bright, tabletop, fully coherent hard X-ray beams can be generated through nonlinear upconversion of femtosecond laser light. By driving the high-order harmonic generation process using longer-wavelength midinfrared light, we show that, in theory, fully phase-matched frequency upconversion can extend into the hard X-ray region of the spectrum. We verify our scaling predictions experimentally by demonstrating phase matching in the soft X-ray region of the spectrum around 330 eV, using ultrafast driving laser pulses at 1.3-μm wavelength, in an extended, high-pressure, weakly ionized gas medium. We also show through calculations that scaling of the overall conversion efficiency is surprisingly favorable as the wavelength of the driving laser is increased, making tabletop, fully coherent, multi-keV X-ray sources feasible. The rapidly decreasing microscopic single-atom yield, predicted for harmonics driven by longer-wavelength lasers, is compensated macroscopically by an increased optimal pressure for phase matching and a rapidly decreasing reabsorption of the generated X-rays.",

keywords = "Coherent, Extreme nonlinear optics, Ultrafast",

author = "Tenio Popmintchev and Chen, {Ming Chang} and Alon Bahabad and Michael Gerrity and Pavel Sidorenko and Oren Cohen and Christov, {Ivan P.} and Murnane, {Margaret M.} and Kapteyn, {Henry C.}",

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Popmintchev, T, Chen, MC, Bahabad, A, Gerrity, M, Sidorenko, P, Cohen, O, Christov, IP, Murnane, MM & Kapteyn, HC 2009, 'Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum', Proceedings of the National Academy of Sciences of the United States of America, vol. 106, no. 26, pp. 10516-10521. https://doi.org/10.1073/pnas.0903748106

TY - JOUR

T1 - Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum

AU - Popmintchev, Tenio

AU - Chen, Ming Chang

AU - Bahabad, Alon

AU - Gerrity, Michael

AU - Sidorenko, Pavel

AU - Cohen, Oren

AU - Christov, Ivan P.

AU - Murnane, Margaret M.

AU - Kapteyn, Henry C.

PY - 2009/6/30

Y1 - 2009/6/30

N2 - We show how bright, tabletop, fully coherent hard X-ray beams can be generated through nonlinear upconversion of femtosecond laser light. By driving the high-order harmonic generation process using longer-wavelength midinfrared light, we show that, in theory, fully phase-matched frequency upconversion can extend into the hard X-ray region of the spectrum. We verify our scaling predictions experimentally by demonstrating phase matching in the soft X-ray region of the spectrum around 330 eV, using ultrafast driving laser pulses at 1.3-μm wavelength, in an extended, high-pressure, weakly ionized gas medium. We also show through calculations that scaling of the overall conversion efficiency is surprisingly favorable as the wavelength of the driving laser is increased, making tabletop, fully coherent, multi-keV X-ray sources feasible. The rapidly decreasing microscopic single-atom yield, predicted for harmonics driven by longer-wavelength lasers, is compensated macroscopically by an increased optimal pressure for phase matching and a rapidly decreasing reabsorption of the generated X-rays.

AB - We show how bright, tabletop, fully coherent hard X-ray beams can be generated through nonlinear upconversion of femtosecond laser light. By driving the high-order harmonic generation process using longer-wavelength midinfrared light, we show that, in theory, fully phase-matched frequency upconversion can extend into the hard X-ray region of the spectrum. We verify our scaling predictions experimentally by demonstrating phase matching in the soft X-ray region of the spectrum around 330 eV, using ultrafast driving laser pulses at 1.3-μm wavelength, in an extended, high-pressure, weakly ionized gas medium. We also show through calculations that scaling of the overall conversion efficiency is surprisingly favorable as the wavelength of the driving laser is increased, making tabletop, fully coherent, multi-keV X-ray sources feasible. The rapidly decreasing microscopic single-atom yield, predicted for harmonics driven by longer-wavelength lasers, is compensated macroscopically by an increased optimal pressure for phase matching and a rapidly decreasing reabsorption of the generated X-rays.

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KW - Extreme nonlinear optics

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Phase matching of high harmonic generation in the soft and hard X-ray regions of the spectrum

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