Publications of Alexander Paarmann

Journal Article (41)

2018
Journal Article
K. Pufahl, N. Paßler, N.B. Grosse, M. Wolf, U. Woggon and A. Paarmann: Controlling nanoscale air-gaps for critically coupled surface polaritons by means of non-invasive white-light interferometry. Applied Physics Letters 113 (16), 161103 (2018).
Journal Article
I. Razdolski, N. Paßler, C.R. Gubbin, C. Winta, R. Cernansky, F. Martini, A. Politi, S.A. Maier, M. Wolf, A. Paarmann and S. De Liberato: Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes. Physical Review B 98 (12), 125425 (2018).
Journal Article
R. Kießling, W.B. Colson, S. Gewinner, W. Schöllkopf, M. Wolf and A. Paarmann: Femtosecond single-shot timing and direct observation of subpulse formation in an infrared free-electron laser. Physical Review Accelerators and Beams 21 (08), 080702 (2018).
Journal Article
M. Porer, M. Fechner, E.M. Bothschafter, L. Rettig, M. Savoini, V. Esposito, J. Rittmann, M. Kubli, M.J. Neugebauer, E. Abreu, T. Kubacka, T. Huber, G. Lantz, S. Parchenko, S. Grübel, A. Paarmann, J. Noack, P. Beaud, G. Ingold, U. Aschauer, S.L. Johnson and U. Staub: Ultrafast Relaxation Dynamics of the Antiferrodistortive Phase in Ca Doped SrTiO3. Physical Review Letters 121 (05), 055701 (2018).
Journal Article
N. Paßler, C.R. Gubbin, T.G. Folland, I. Razdolski, D.S. Katzer, D.F. Storm, M. Wolf, S.D. Liberato, J.D. Caldwell and A. Paarmann: Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures. Nano Letters 18 (7), 4285–4292 (2018).
Journal Article
S.F. Maehrlein, I. Radu, P. Maldonado, A. Paarmann, M. Gensch, A.M. Kalashnikova, R.V. Pisarev, M. Wolf, P.M. Oppeneer, J. Barker and T. Kampfrath: Dissecting spin-phonon equilibration in ferrimagnetic insulators by ultrafast lattice excitation. Science Advances 4 (7), eaar5164 (2018).
Journal Article
C. Winta, S. Gewinner, W. Schöllkopf, M. Wolf and A. Paarmann: Second-harmonic phonon spectroscopy of α-quartz. Physical Review B 97 (9), 094108 (2018).
2017
Journal Article
S.F. Maehrlein, A. Paarmann, M. Wolf and T. Kampfrath: Terahertz Sum-Frequency Excitation of a Raman-Active Phonon. Physical Review Letters 119 (12), 127402 (2017).
Journal Article
N. Paßler and A. Paarmann: Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures. Journal of the Optical Society of America B 34 (10), 102128–102139 (2017).
Journal Article
N. Passler, I. Razdolski, S. Gewinner, W. Schöllkopf, M. Wolf and A. Paarmann: Second-Harmonic Generation from Critically Coupled Surface Phonon Polaritons. ACS Photonics 4 (5), 1048–1053 (2017).
2016
Journal Article
I. Razdolski, Y. Chen, A.J. Giles, S. Gewinner, W. Schöllkopf, M. Hong, M. Wolf, V. Giannini, J.D. Caldwell, S.A. Maier and A. Paarmann: Resonant Enhancement of Second-Harmonic Generation in the Mid-Infrared Using Localized Surface Phonon Polaritons in Subdiffractional Nanostructures. Nano Letters 16 (11), 6954–6959 (2016).
Journal Article
A. Paarmann, I. Razdolski, S. Gewinner, W. Schöllkopf and M. Wolf: Effects of crystal anisotropy on optical phonon resonances in midinfrared second harmonic response of SiC. Physical Review B 94 (13), 134312 (2016).
Journal Article
M. Müller, V. Kravtsov, A. Paarmann, M.B. Raschke and R. Ernstorfer: Nanofocused Plasmon-Driven Sub-10 fs Electron Point Source. ACS Photonics 3 (4), 611–619 (2016).
2015
Journal Article
A. Paarmann, I. Razdolski, A. Melnikov, S. Gewinner, W. Schöllkopf and M. Wolf: Second harmonic generation spectroscopy in the Reststrahl band of SiC using an infrared free-electron laser. Applied Physics Letters 107 (8), 081101 (2015).
2014
Journal Article
M. Müller, A. Paarmann and R. Ernstorfer: Femtosecond electrons probing currents and atomic structure in nanomaterials. Nature Communications 5 (10), 5292 (2014).
2013
Journal Article
S. Lüneburg, M. Müller, A. Paarmann and R. Ernstorfer: Microelectrode for energy and current control of nanotip field electron emitters. Applied Physics Letters 103 (21), 213506 (2013).
Journal Article
E. Bothschafter, A. Paarmann, N. Karpowicz, E.S. Zijlstra, M.E. Garcia, F. Krausz, R. Kienberger and R. Ernstorfer: Interband excitation and carrier relaxation as displacive driving force for coherent phonons. EPJ Web of Conferences 41, 04021 (2013).
Journal Article
M. Müller, A. Paarmann, C. Xu and R. Ernstorfer: Coherent Electron Source for Ultrafast Electron Diffraction and Imaging. EPJ Web of Conferences 41, 10007 (2013).
Journal Article
E.M. Bothschafter, A. Paarmann, E.S. Zijlstra, N. Karpowicz, M.E. Garcia, R. Kienberger and R. Ernstorfer: Ultrafast Evolution of the Excited-State Potential Energy Surface of TiO2 Single Crystals Induced by Carrier Cooling. Physical Review Letters 110 (6), 067402 (2013).
2012
Journal Article
A. Paarmann, M. Gulde , M. Müller, S. Schäfer , S. Schweda , M. Maiti, C. Xu, T. Hohage, F. Schenk , C. Ropers and R. Ernstorfer: Coherent femtosecond low-energy single-electron pulses for time-resolved diffraction and imaging: A numerical study. Journal of Applied Physcis 112 (11), 113109 (2012).
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