Herink, Georg

[["dc.bibliographiccitation.firstpage","463"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Nature Photonics"],["dc.bibliographiccitation.lastpage","468"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Solli, Daniel R."],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Jalali, Bahram"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T09:08:44Z"],["dc.date.available","2018-11-07T09:08:44Z"],["dc.date.issued","2012"],["dc.description.abstract","Stochastically driven nonlinear processes are responsible for spontaneous pattern formation and instabilities in numerous natural and artificial systems, including well-known examples such as sand ripples, cloud formations, water waves, animal pigmentation and heart rhythms(1-3). Technologically, a type of such self-amplification drives free-electron lasers(4,5) and optical supercontinuum sources(6,7) whose radiation qualities, however, suffer from the stochastic origins(8-11). Through time-resolved observations, we identify intrinsic properties of these fluctuations that are hidden in ensemble measurements. We acquire single-shot spectra of modulation instability produced by laser pulses in glass fibre at megahertz real-time capture rates. The temporally confined nature of the gain physically limits the number of amplified modes, which form an anti-bunched arrangement as identified from a statistical analysis of the data. These dynamics provide an example of pattern competition and interaction in confined nonlinear systems."],["dc.identifier.doi","10.1038/NPHOTON.2012.126"],["dc.identifier.isi","000305905000015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26093"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1749-4893"],["dc.relation.issn","1749-4885"],["dc.title","Fluctuations and correlations in modulation instability"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","UNSP 80"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Physics B"],["dc.bibliographiccitation.volume","122"],["dc.contributor.author","Echternkamp, Katharina E."],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Yalunin, Sergey V."],["dc.contributor.author","Rademann, K."],["dc.contributor.author","Schaefer, S."],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T10:16:24Z"],["dc.date.available","2018-11-07T10:16:24Z"],["dc.date.issued","2016"],["dc.description.abstract","Metallic nanotips exhibit large electric field enhancements over an extremely broad bandwidth spanning from the optical domain down to static fields. They therefore constitute ideal model systems for the investigation of the inherent frequency scalings of highly nonlinear and strong-field phenomena. Here, we present a comprehensive study of strong-field photoemission from individual metallic nanotips. Combining high local fields and variable-wavelength mid-infrared pulses, we investigate electron dynamics governed by the nanoscale confinement of the optical near-field. In particular, we characterize a transition to sub-cycle, field-driven electron acceleration. The experimental findings are corroborated by semiclassical calculations within a two-step model."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [SPP 1391, SFB 1073]"],["dc.identifier.doi","10.1007/s00340-016-6351-x"],["dc.identifier.isi","000372894600013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41031"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.issn","1432-0649"],["dc.relation.issn","0946-2171"],["dc.title","Strong-field photoemission in nanotip near-fields: from quiver to sub-cycle electron dynamics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","131102"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.volume","111"],["dc.contributor.author","Wimmer, Lara"],["dc.contributor.author","Schröder, Benjamin"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:28:21Z"],["dc.date.available","2019-11-28T10:28:21Z"],["dc.date.issued","2017"],["dc.description.abstract","We apply terahertz (THz) near-field streaking in a nanofocusing geometry to investigate plasmon polariton propagation on the shaft of a conical nanotip. By evaluating the delay between a streaking spectrogram for plasmon-induced photoemission with a measurement for direct apex excitation, we obtain an average plasmon group velocity, which is in agreement with numerical simulations. Combining plasmon-induced photoemission with THz near-field streaking facilitates extensive control over localized photoelectron sources for time-resolved imaging and diffraction."],["dc.identifier.doi","10.1063/1.4991860"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62697"],["dc.language.iso","en"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area C | C04 Untersuchung und Kontrolle photochemischer Reaktionen durch lokale optische Anregung im Rastertunnelmikroskop"],["dc.relation.issn","0003-6951"],["dc.relation.issn","1077-3118"],["dc.title","Clocking plasmon nanofocusing by THz near-field streaking"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","L12"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Annalen der Physik"],["dc.bibliographiccitation.lastpage","L18"],["dc.bibliographiccitation.volume","525"],["dc.bibliographiccitation.volumetitle","Ultrafast Phenomena on the Nanoscale"],["dc.contributor.author","Yalunin, Sergey V."],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Solli, Daniel R."],["dc.contributor.author","Krueger, Michael"],["dc.contributor.author","Hommelhoff, Peter"],["dc.contributor.author","Diehn, Manuel"],["dc.contributor.author","Munk, Axel"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2017-09-07T11:48:18Z"],["dc.date.available","2017-09-07T11:48:18Z"],["dc.date.issued","2013"],["dc.description.abstract","This article presents a quantum mechanical treatment of strong-field photoelectron emission from nanostructures. The effects of a spatial inhomogeneity of the optical near-field are identified. Furthermore, the importance of electron scattering at the surface is elucidated by contrasting simulations with and without backscattering. Convincing agreement with experimental data under various conditions is demonstrated."],["dc.identifier.doi","10.1002/andp.201200224"],["dc.identifier.gro","3142395"],["dc.identifier.isi","000314918500007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7808"],["dc.language.iso","en"],["dc.notes.intern","WoS Import 2017-03-10 / Funder: Deutsche Forschungsgemeinschaft [DFG-ZUK 45/1, SPP 1391, SFB755]"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","0003-3804"],["dc.title","Field localization and rescattering in tip-enhanced photoemission"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","233"],["dc.bibliographiccitation.lastpage","258"],["dc.contributor.author","Wimmer, Lara"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Yalunin, Sergey Valerevich"],["dc.contributor.author","Echternkamp, K. E."],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:17:15Z"],["dc.date.available","2019-11-28T10:17:15Z"],["dc.date.issued","2016"],["dc.description.abstract","This Chapter presents recent findings on nonlinear ionization and photoemission processes at metallic nanostructures. A particular emphasis is placed on processes which—due to the localized excitation in optical near-fields—exhibit different properties and scalings from their counterparts in the gas phase or at planar surfaces. The Chapter is structured in two parts. The first part discusses various regimes in highly nonlinear photoelectron emission from metallic nanotips, including field-driven photoemission at near- and mid-infrared frequencies, and the control of localized photoemission using intense terahertz transients. In the second part, multiphoton and strong-field ionization of atomic gases in plasmonic antennas and waveguides is presented. It is demonstrated that local ionization is enabled by optical field enhancements in various types of structures. At the same time, fundamental physical limitations preventing efficient high-harmonic generation in nanostructures are discussed."],["dc.identifier.doi","10.1007/978-3-319-20173-3_10"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62693"],["dc.language.iso","en"],["dc.publisher","Springer"],["dc.relation.isbn","978-3-319-20172-6"],["dc.relation.isbn","978-3-319-20173-3"],["dc.relation.ispartof","Ultrafast Dynamics Driven by Intense Light Pulses"],["dc.relation.issn","1615-5653"],["dc.relation.issn","2197-6791"],["dc.title","Highly Nonlinear and Ultrafast Optical Phenomena in Metallic Nanostructures"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","14164"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Optics Express"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Bensch, Hauke M."],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Kurtz, Felix"],["dc.contributor.author","Morgner, Uwe"],["dc.date.accessioned","2020-12-10T18:42:01Z"],["dc.date.available","2020-12-10T18:42:01Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1364/OE.25.014164"],["dc.identifier.eissn","1094-4087"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77777"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Harmonically mode-locked Yb:CALGO laser oscillator"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","165416"],["dc.bibliographiccitation.issue","16"],["dc.bibliographiccitation.journal","Physical Review. B"],["dc.bibliographiccitation.volume","95"],["dc.contributor.author","Wimmer, Lara"],["dc.contributor.author","Karnbach, Oliver"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-12-10T18:25:03Z"],["dc.date.available","2020-12-10T18:25:03Z"],["dc.date.issued","2017"],["dc.description.abstract","We present a comprehensive experimental and numerical study of photoelectron streaking at metallic nanotips using single-cycle terahertz (THz) transients and a static bias voltage as an external control parameter. Analyzing bias voltage dependent streaking spectrograms, we explore the THz-induced reshaping of photoelectron energy spectra, governed by the superimposed static field. Numerical simulations are employed to determine the local field strengths and spatial decay lengths of the field contributions, demonstrating electron trajectory control and the manipulation of the phase space distributions in confined fields with both dynamic and static components."],["dc.identifier.doi","10.1103/PhysRevB.95.165416"],["dc.identifier.eissn","2469-9969"],["dc.identifier.isi","000401768800003"],["dc.identifier.issn","2469-9950"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75563"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Phase space manipulation of free-electron pulses from metal nanotips using combined terahertz near fields and external biasing"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","09013"],["dc.bibliographiccitation.journal","EPJ Web of Conferences"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Solli, D. R."],["dc.contributor.author","Gulde, Max"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-07-09T11:40:13Z"],["dc.date.available","2019-07-09T11:40:13Z"],["dc.date.issued","2013"],["dc.description.abstract","We present strong-field photoemission from plasmonic nanotips driven by ultrashort pulses at wavelengths of 0.8-8μm, reaching Keldysh parameters down to 0.1. We identify a sub-cycle acceleration regime that is exclusive to confined fields in nanostructures."],["dc.identifier.doi","10.1051/epjconf/20134109013"],["dc.identifier.fs","601622"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10767"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58117"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2100-014X"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 3.0"],["dc.rights.access","openAccess"],["dc.title","Strong-field photoemission from nanostructuresdriven by few-cycle mid-infrared fields"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","077138"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","AIP Advances"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Kusa, F."],["dc.contributor.author","Echternkamp, Katharina E."],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Ashihara, S."],["dc.date.accessioned","2018-11-07T09:54:58Z"],["dc.date.available","2018-11-07T09:54:58Z"],["dc.date.issued","2015"],["dc.description.abstract","We demonstrate strong-field photoelectron emission from gold nanorods driven by femtosecond mid-infrared optical pulses. The maximum photoelectron yield is reached at the localized surface plasmon resonance, indicating that the photoemission is governed by the resonantly-enhanced optical near-field. The wavelength-and field-dependent photoemission yield allows for a noninvasive determination of local field enhancements, and we obtain intensity enhancement factors close to 1300, in good agreement with finite-difference time domain computations. (C) 2015 Author(s)."],["dc.identifier.doi","10.1063/1.4927151"],["dc.identifier.isi","000358922500038"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36652"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.issn","2158-3226"],["dc.rights","CC BY 3.0"],["dc.title","Optical field emission from resonant gold nanorods driven by femtosecond mid-infrared pulses"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Reviews of Modern Physics"],["dc.bibliographiccitation.volume","92"],["dc.contributor.author","Dombi, Péter"],["dc.contributor.author","Pápa, Zsuzsanna"],["dc.contributor.author","Vogelsang, Jan"],["dc.contributor.author","Yalunin, Sergey Valerevich"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Groß, Petra"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Lienau, Christoph"],["dc.date.accessioned","2020-07-20T14:16:38Z"],["dc.date.available","2020-07-20T14:16:38Z"],["dc.date.issued","2020"],["dc.description.abstract","The present status and development of strong-field nano-optics, an emerging field of nonlinear optics, is discussed. A nonperturbative regime of light-matter interactions is reached when the amplitude of the external electromagnetic fields that are driving a material approach or exceed the field strengths that bind the electrons inside the medium. In this strong-field regime, light-matter interactions depend on the amplitude and phase of the field, rather than its intensity, as in more conventional perturbative nonlinear optics. Traditionally such strong-field interactions have been intensely investigated in atomic and molecular systems, and this has resulted in the generation of high-harmonic radiation and laid the foundations for contemporary attosecond science. Over the past decade, however, a new field of research has emerged, the study of strong-field interactions in solid-state nanostructures. By using nanostructures, specifically those made out of metals, external electromagnetic fields can be localized on length scales of just a few nanometers, resulting in signficantly enhanced field amplitudes that can exceed those of the external field by orders of magnitude in the vicinity of the nanostructures. This leads not only to dramatic enhancements of perturbative nonlinear optical effects but also to significantly increased photoelectron yields. It resulted in a wealth of new phenomena in laser-solid interactions that have been discovered in recent years. These include the observation of above-threshold photoemission from single nanostructures, effects of the carrier-envelope phase on the photoelectron emission yield from metallic nanostructures, and strong-field acceleration of electrons in optical near fields on subcycle timescales. The current state of the art of this field is reviewed, and several scientific applications that have already emerged from the fundamental discoveries are discussed. These include, among others, the coherent control of localized electromagnetic fields at the surface of solid-state nanostructures and of free-electron wave packets by such optical near fields, resulting in the creation of attosecond electron bunches, the coherent control of photocurrents on nanometer length and femtosecond timescales by the electric field of a laser pulse, and the development of new types of ultrafast electron microscopes with unprecedented spatial, temporal, and energy resolution. The review concludes by highlighting possible future developments, discussing emerging topics in photoemission and potential strong-field nanophotonic devices, and giving perspectives for coherent ultrafast microscopy techniques. More generally, it is shown that the synergy between ultrafast science, plasmonics, and strong-field physics holds promise for pioneering scientific discoveries in the upcoming years."],["dc.identifier.doi","10.1103/RevModPhys.92.025003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67300"],["dc.language.iso","en"],["dc.relation.eissn","1539-0756"],["dc.relation.issn","0034-6861"],["dc.title","Strong-field nano-optics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]