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.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","190"],["dc.bibliographiccitation.issue","7388"],["dc.bibliographiccitation.journal","Nature"],["dc.bibliographiccitation.lastpage","193"],["dc.bibliographiccitation.volume","483"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Solli, Daniel R."],["dc.contributor.author","Gulde, Max"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T09:12:23Z"],["dc.date.available","2018-11-07T09:12:23Z"],["dc.date.issued","2012"],["dc.description.abstract","Strong-field physics, an extreme limit of light-matter interaction(1-3), is expanding into the realm of surfaces(4,5) and nanostructures(6-11) from its origin in atomic and molecular science(12-15). The attraction of nanostructures lies in two intimately connected features: local intensity enhancement and sub-wavelength confinement of optical fields. Local intensity enhancement facilitates access to the strong-field regime and has already sparked various applications, whereas spatial localization has the potential to generate strong-field dynamics exclusive to nanostructures. However, the observation of features unattainable in gaseous media is challenged by many-body effects and material damage, which arise under intense illumination of dense systems(16-19). Here, we non-destructively access this regime in the solid state by employing single plasmonic nanotips and few-cycle mid-infrared pulses, making use of the wavelength-dependence of the interaction, that is, the ponderomotive energy. We investigate strong-field photoelectron emission and acceleration from single nanostructures over a broad spectral range, and find kinetic energies of hundreds of electronvolts. We observe the transition to a new regime in strong-field dynamics, in which the electrons escape the nanolocalized field within a fraction of an optical half-cycle. The transition into this regime, characterized by a spatial adiabaticity parameter, would require relativistic electrons in the absence of nanostructures. These results establish new degrees of freedom for the manipulation and control of electron dynamics on femtosecond and attosecond timescales, combining optical near-fields and nanoscopic sources."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [DFG-ZUK 45/1, SPP 1391]"],["dc.identifier.doi","10.1038/nature10878"],["dc.identifier.isi","000301174900033"],["dc.identifier.pmid","22398557"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26937"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","0028-0836"],["dc.title","Field-driven photoemission from nanostructures quenches the quiver motion"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","432"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Nature Physics"],["dc.bibliographiccitation.lastpage","436"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Wimmer, Lara"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Solli, Daniel R."],["dc.contributor.author","Yalunin, Sergey V."],["dc.contributor.author","Echternkamp, Katharina E."],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T09:39:35Z"],["dc.date.available","2018-11-07T09:39:35Z"],["dc.date.issued","2014"],["dc.description.abstract","The active control of matter by strong electromagnetic fields is of growing importance, with applications all across the optical spectrum from the extreme-ultraviolet to the far-infrared. In recent years, phase-stable terahertz fields have shown tremendous potential for observing and manipulating elementary excitations in solids(1-3). In the gas phase, on the other hand, driving free charges with terahertz transients provides insight into ultrafast ionization dynamics(4,5). Developing such approaches for locally enhanced terahertz fields in nanostructures will create new means to govern electron currents on the nanoscale. Here, we use single-cycle terahertz transients to demonstrate extensive control over nanotip photoelectron emission. The terahertz near-field is shown to either enhance or suppress photocurrents, with the tip acting as an ultrafast rectifying diode(6). We record phase-resolved sub-cycle dynamics and find spectral compression and expansion arising from electron propagation within the terahertz near-field. These interactions produce rich spectro-temporal features and offer unprecedented control over ultrashort free electron pulses for imaging and diffraction."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [DFG-SPP 1391, ZuK 45/1]"],["dc.identifier.doi","10.1038/NPHYS2974"],["dc.identifier.isi","000336969500019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33316"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","1745-2481"],["dc.relation.issn","1745-2473"],["dc.title","Terahertz control of nanotip photoemission"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","321"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Nature Photonics"],["dc.bibliographiccitation.lastpage","326"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Jalali, Bahram"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Solli, Daniel R."],["dc.date.accessioned","2018-11-07T10:15:13Z"],["dc.date.available","2018-11-07T10:15:13Z"],["dc.date.issued","2016"],["dc.description.abstract","Mode-locked lasers have enabled some of the most precise measurements ever performed, from attosecond time-domain spectroscopy to metrology with frequency combs. However, such extreme precision belies the complexity of the underlying mode-locking dynamics. This complexity is particularly evident in the emergence of the mode-locked state, an intrinsically singular, non-repetitive transition. Many details of mode-locking are well understood, yet conventional spectroscopy cannot resolve the nascent dynamics in passive mode-locking on their natural nanosecond timescale, the single pulse period. Here, we capture the pulse-resolved spectral evolution of a femtosecond pulse train from the initial fluctuations, recording similar to 900,000 consecutive periods. We directly observe critical phenomena on timescales from tens to thousands of roundtrips, including the birth of the broadband spectrum, accompanying wavelength shifts and transient interference dynamics described as auxiliary-pulse mode-locking. Enabled by the time-stretch transform, the results may impact laser design, ultrafast diagnostics and nonlinear optics."],["dc.identifier.doi","10.1038/nphoton.2016.38"],["dc.identifier.eissn","1749-4893"],["dc.identifier.isi","000374980100014"],["dc.identifier.issn","1749-4885"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40765"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","1749-4893"],["dc.relation.issn","1749-4885"],["dc.title","Resolving the build-up of femtosecond mode-locking with single-shot spectroscopy at 90 MHz frame rate"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","50"],["dc.bibliographiccitation.issue","6333"],["dc.bibliographiccitation.journal","Science"],["dc.bibliographiccitation.lastpage","53"],["dc.bibliographiccitation.volume","356"],["dc.contributor.author","Herink, Georg"],["dc.contributor.author","Kurtz, F."],["dc.contributor.author","Jalali, Bahram"],["dc.contributor.author","Solli, Daniel R."],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T10:25:04Z"],["dc.date.available","2018-11-07T10:25:04Z"],["dc.date.issued","2017"],["dc.description.abstract","Solitons, particle-like excitations ubiquitous in many fields of physics, have been shown to exhibit bound states akin to molecules. The formation of such temporal soliton bound states and their internal dynamics have escaped direct experimental observation. By means of an emerging time-stretch technique, we resolve the evolution of femtosecond soliton molecules in the cavity of a few-cycle mode-locked laser. We track two-and three-soliton bound states over hundreds of thousands of consecutive cavity roundtrips, identifying fixed points and periodic and aperiodic molecular orbits. A class of trajectories acquires a path-dependent geometrical phase, implying that its dynamics may be topologically protected. These findings highlight the importance of real-time detection in resolving interactions in complex nonlinear systems, including the dynamics of soliton bound states, breathers, and rogue waves."],["dc.identifier.doi","10.1126/science.aal5326"],["dc.identifier.isi","000398689100034"],["dc.identifier.pmid","28386005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42777"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1095-9203"],["dc.relation.issn","0036-8075"],["dc.title","Real-time spectral interferometry probes the internal dynamics of femtosecond soliton molecules"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]