Phonon-Materie Wechselwirkungen auf der Nanoskala
Zusammenfassung der Projektergebnisse
The project aimed to study and control electron-phonon-magnon interactions in matter at the nanoscale dimension. Static (3D) phonon confinement in nanostructures provides an exciting possibility to control electron-phonon interaction (and hence the optical response of matter) by manipulating the phonon density of states. Implemented in a nanoscale system with proper material boundary conditions, we study how phonon confinement affects exciton emission in single colloidal quantum dots. In nano-films and nanoribbons, 1D and 2D confinement of phonons still allow for strain-wave propagation in an unconfined dimension. Thus, ferromagnetic nanofilms provide an excellent ground for studying enhanced magnon-phonon coupling, leading to the possibilities of spin data manipulation using strain gates. Such dynamics can be revealed with experimental techniques such as time-resolved spectroscopies. Coupling of magnetic and phononic degrees of freedom can leads to magnetoelastic wave formation, of interest for tasks of transporting spin information. Such excitations are impulsive, thus preserving the original coherence of the excitation mechanism, yielding possibilities of coherent control. Finally, and coming back to electronic degrees of freedom, acoustic strain pulses can be launched from various nanostructure elements as a probing mechanism of the dynamics of electron-phonon coupling beyond the standard dipole approximation due to the nano-scale wavelength of the acoustic wavepackets. This project investigated several static and dynamic aspects of electron-phonon and magnon-phonon coupling both in 3D and 1D confined systems, such as quantum dots and nanofilms.
Projektbezogene Publikationen (Auswahl)
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Confined Acoustic Phonon Modes and Exciton-Phonon Coupling in Single CdSe/CdS/PMMA Hybrid Particles. Conference on Lasers and Electro-Optics, FW1N.5. OSA.
Werschler, Florian; Hinz, Christopher; de Roo, Tjaard; Mecking, Stefan; Leitenstorfer, Alfred & Seletskiy, Denis V.
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Coupling of Excitons and Discrete Acoustic Phonons in Vibrationally Isolated Quantum Emitters. Nano Letters, 16(9), 5861-5865.
Werschler, Florian; Hinz, Christopher; Froning, Florian; Gumbsheimer, Pascal; Haase, Johannes; Negele, Carla; de Roo, Tjaard; Mecking, Stefan; Leitenstorfer, Alfred & Seletskiy, Denis V.
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Towards the nonlinear acousto-magneto-plasmonics. Journal of Optics, 18(9), 093002.
Temnov, Vasily V.; Razdolski, Ilya; Pezeril, Thomas; Makarov, Denys; Seletskiy, Denis; Melnikov, Alexey & Nelson, Keith A.
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Transient Grating Spectroscopy in Magnetic Thin Films: Simultaneous Detection of Elastic and Magnetic Dynamics. Scientific Reports, 6(1).
Janušonis, J.; Jansma, T.; Chang, C. L.; Liu, Q.; Gatilova, A.; Lomonosov, A. M.; Shalagatskyi, V.; Pezeril, T.; Temnov, V. V. & Tobey, R. I.
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Ultrafast magnetoelastic probing of surface acoustic transients. Physical Review B, 94(2).
Janušonis, J.; Chang, C. L.; Jansma, T.; Gatilova, A.; Vlasov, V. S.; Lomonosov, A. M.; Temnov, V. V. & Tobey, R. I.
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Lifetime Shortening and Photoluminescence Emission Enhancement of Single CdSe/CdS/PMMA Quantum Emitters Coupled to Plasmonic Bullseye Resonators. Conference on Lasers and Electro-Optics, FW4H.4. OSA.
Werschler, Florian; Lindner, Benjamin; Hinz, Christopher; de Roo, Tjaard; Mecking, Stefan; Seletskiy, Denis V. & Leitenstorfer, Alfred
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Parametric frequency mixing in a magnetoelastically driven linear ferromagnetic-resonance oscillator. Physical Review B, 95(6).
Chang, C. L.; Lomonosov, A. M.; Janusonis, J.; Vlasov, V. S.; Temnov, V. V. & Tobey, R. I.
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Purcell effect and photoluminescence emission enhancement of individual CdSe/CdS/PMMA nano particles coupled to metallic bullseye resonators. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 1-1. IEEE.
Werschler, Florian; Lindner, Benjamin; Hinz, Christopher; de Roo, Tjaard; Mecking, Stefan; Seletskiy, Denis V. & Leitenstorfer, Alfred
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Quantitative disentanglement of coherent and incoherent laser-induced surface deformations by time-resolved x-ray reflectivity. Applied Physics Letters, 111(26).
Sander, M.; Pudell, J.-E.; Herzog, M.; Bargheer, M.; Bauer, R.; Besse, V.; Temnov, V. & Gaal, P.
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Spatiotemporal Coherent Control of Thermal Excitations in Solids. Physical Review Letters, 119(7).
Sander, M.; Herzog, M.; Pudell, J. E.; Bargheer, M.; Weinkauf, N.; Pedersen, M.; Newby, G.; Sellmann, J.; Schwarzkopf, J.; Besse, V.; Temnov, V. V. & Gaal, P.
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Manipulation der Kopplung einzelner Elektronen an Photonen und Phononen in hybriden Festkörper-Quantenstrukturen, PhD Dissertation, University of Konstanz (2018)
Florian Werschler
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Observation of the nonlinear Wood's anomaly on periodic arrays of nickel nanodimers. Physical Review B, 98(24).
Tran, Ngoc-Minh; Chioar, Ioan-Augustin; Stein, Aaron; Alekhin, Alexandr; Juvé, Vincent; Vaudel, Gwenaëlle; Razdolski, Ilya; Kapaklis, Vassilios & Temnov, Vasily
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Gilbert damping in NiFeGd compounds: Ferromagnetic resonance versus time-resolved spectroscopy. Physical Review B, 99(10).
Salikhov, R.; Alekhin, A.; Parpiiev, T.; Pezeril, T.; Makarov, D.; Abrudan, R.; Meckenstock, R.; Radu, F.; Farle, M.; Zabel, H. & Temnov, V. V.
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Generation of exchange magnons in thin ferromagnetic films by ultrashort acoustic pulses. Journal of Magnetism and Magnetic Materials, 502, 166320.
Besse, V.; Golov, A.V.; Vlasov, V.S.; Alekhin, A.; Kuzmin, D.; Bychkov, I.V.; Kotov, L.N. & Temnov, V.V.
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Magnetization switching in bistable nanomagnets by picosecond pulses of surface acoustic waves. Physical Review B, 101(2).
Vlasov, Vladimir S.; Lomonosov, Alexey M.; Golov, Anton V.; Kotov, Leonid N.; Besse, Valentin; Alekhin, Alexandr; Kuzmin, Dmitry A.; Bychkov, Igor V. & Temnov, Vasily V.
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Enhanced Determination of Emission Fine Structure and Orientation of Individual Quantum Dots Based on Correction Algorithm for Spectral Diffusion. Journal of Physics D: Applied Physics.
Gumbsheimer, Pascal; Conradt, Frieder; Behovits, Yannic; Huber, Steffen; Hinz, Christopher; Negele, Carla; Mecking, Stefan; Seletskiy, Denis V. & Leitenstorfer, Alfred
