CFEL-MPT

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2019-04-11
12:01
Embargoed OpenAccess [PUBDB-2019-01931] Journal Article

Big data approach for effective ionic radii
Effective ionic radii are a useful tool for researchers in many disciplines. These radii are usually determined from interatomic distances and the values tabulated by Shannon and Prewitt are widely used since 1969. [...]
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ddc:530
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2018-12-21
07:57
OpenAccess [PUBDB-2018-05840] Conference Presentation
et al
Polarization states of high-harmonics generated in silicon from elliptical drivers
Ultrafast Phenomena, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20  GO
The polarization states of high-harmonics generated in silicon with elliptical excitation is studied. Circularly polarized harmonics are demonstrated with both circular and non-circularexcitation, determined by crystal symmetry and dynamical response of the system..
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2018-11-21
14:16
[PUBDB-2018-04680] Contribution to a conference proceedings/Contribution to a book
et al
Ultrafast Control of Even-Order Harmonic Generation from Solids by an Intense Terahertz Field
2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) : [Proceedings] - IEEE, 2018. - ISBN 978-1-5386-3809-5 - doi:10.1109/IRMMW-THz.2018.8510220
2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz2018, NagoyaNagoya, Japan, 9 Sep 2018 - 14 Sep 20182018-09-092018-09-14
New York, NY : IEEE 2 pp. () [10.1109/IRMMW-THz.2018.8510220]  GO
Nonperturbative even-order harmonics, physically forbidden in centrosymmetric crystals, are observed from both insulator (diamond) and semiconductor (silicon) samples driven by IR pulses, when in addition an intense THz electric field is applied to the solid. The time-resolved study of the high-harmonic spectra with the temporal profile of the THz electric field suggests a transient THz-field-induced symmetry reduction. [...]
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ddc:620
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2018-06-22
14:14
OpenAccess [PUBDB-2018-02362] Contribution to a conference proceedings/Contribution to a book
et al
Strong-field polarization-state control of higher harmonics generated in crystalline solids
Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2018. - ISBN 978-1-943580-42-2 - doi:10.1364/CLEO_QELS.2018.FF3P.5
CLEO: QELS_Fundamental Science, CLEO QELS, San Jose, CaliforniaSan Jose, California, USA, 13 May 2018 - 18 May 20182018-05-132018-05-18
Washington, D.C., USA : OSA, OSA technical digest (online) 2 pp. () [10.1364/CLEO_QELS.2018.FF3P.5]  GO
We demonstrate that the polarization states of higher harmonics emitted from crystalline solids (here silicon, quartz) are determined by both crystal symmetry and nonperturbative dynamics, opening the door to strong-field control of the harmonics’ polarization states..
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2018-06-22
13:03
OpenAccess [PUBDB-2018-02355] Contribution to a conference proceedings/Contribution to a book
et al
High-Order Harmonic Generation from Solids Dressed by an Intense Terahertz Field
Conference on Lasers and Electro-Optics : [Proceedings] - OSA Washington, D.C., 2018. - ISBN 978-1-943580-42-2 - doi:10.1364/CLEO_QELS.2018.FM3F.3
CLEO: QELS_Fundamental Science, CLEO QELS, San Jose, CalinforniaSan Jose, Calinfornia, USA, 13 May 2018 - 18 May 20182018-05-132018-05-18
Washington, D.C., USA : OSA, OSA Terchnical Digest (online) 2 pp. () [10.1364/CLEO_QELS.2018.FM3F.3]  GO
Using an intense transient terahertz electric field, we observe the appearance of even-order harmonics in silicon, normally forbidden in centrosymmetric crystals. Reducing the symmetry via transient dressing might lead to ultrafast symmetry control in crystals..
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2018-01-11
10:16
OpenAccess [PUBDB-2018-00424] Conference Presentation
et al
Circularly polarized high-order harmonics from solids driven by single-color infrared pulses
6th International Conference on Attosecond Physics, ATTO 2017, Xi'anXi'an, China, 2 Jul 2017 - 7 Jul 20172017-07-022017-07-07  GO
Intraband and interband dynamics generating high-order harmonics in solids exhibit qualitatively different responses to driver-pulse ellipticity, enabling ellipticity-based harmonic cutoff extension. Ab-initio calculations and experiments demonstrate generation of circularly polarized harmonics from single-color pulses..
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2018-01-10
13:51
OpenAccess [PUBDB-2018-00352] Journal Article
et al
Publisher Correction: Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics
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2017-10-02
14:28
OpenAccess [PUBDB-2017-11098] Journal Article
et al
Ellipticity dependence of high-harmonic generation in solids originating from coupled intraband and interband dynamics
The strong ellipticity dependence of high-harmonic generation (HHG) in gases enables numerous experimental techniques that are nowadays routinely used, for instance, to create isolated attosecond pulses. Extending such techniques to solids requires a fundamental understanding of the microscopic mechanism of HHG. [...]
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2017-08-29
10:24
OpenAccess [PUBDB-2017-10018] Journal Article
et al
Creating stable Floquet–Weyl semimetals by laser-driving of 3D Dirac materials
Tuning and stabilizing topological states, such as Weyl semimetals, Dirac semimetals or topological insulators, is emerging as one of the major topics in materials science. Periodic driving of many-body systems offers a platform to design Floquet states of matter with tunable electronic properties on ultrafast timescales. [...]
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2017-08-08
15:30
[PUBDB-2017-08942] Contribution to a conference proceedings/Contribution to a book
et al
Ellipticity Dependence of Higher-order Harmonics in Solids: Unraveling the Coupled Intraband and Interband Dynamics
CLEO: Applications and Technology in Proceedings Conference on Lasers and Electro-Optics
Conference on Lasers and Electro-Optics, CLEO 2017, San Jose, CaliforniaSan Jose, California, California, 14 May 2017 - 19 May 20172017-05-142017-05-19
Washington D.C. : OSA JTh5B () [10.1364/CLEO_AT.2017.JTh5B.10] special issue: "CLEO: QELS_Fundamental Science 2017"  GO
The various higher-harmonic orders generated in solids exhibit qualitatively different sensitivity to driver-pulse ellipticity, resulting from a different response of intraband and interbanddynamics. Non-zero driver-pulse ellipticity permits harmonic cutoff extension and circularly polarized higher-harmonics..
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