Search Results - "Bruchhausen, Axel"
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Viscoelastic properties and efficient acoustic damping in confined polymer nano-layers at GHz frequencies
Published in Scientific reports (16-09-2016)“…We investigate the viscoelastic properties of confined molecular nano-layers by time resolved optical pump-probe measurements. Access to the elastic properties…”
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Spatial-temporally resolved high-frequency surface acoustic waves on silicon investigated by femtosecond spectroscopy
Published in Applied physics letters (02-07-2012)Get full text
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Ultrafast spectroscopy of super high frequency mechanical modes of doubly clamped beams
Published in Applied physics letters (02-12-2013)“…We use ultrafast pump-probe spectroscopy to study the mechanical vibrations in the time domain of doubly clamped silicon nitride beams. Beams with two…”
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Femtosecond spectroscopy of acoustic frequency combs in the 100-GHz frequency range in Al/Si membranes
Published in Physical review. B, Condensed matter and materials physics (08-11-2013)“…Acoustic frequency combs are optically excited and detected in silicon membranes covered with thin aluminum layers by femtosecond pump-probe spectroscopy. The…”
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Cross‐Section Analysis of the Composition of Sprayed Cu2ZnSnS4 Thin Films by XPS, EDS, and Multi‐Wavelength Raman Spectroscopy
Published in Physica status solidi. A, Applications and materials science (19-12-2018)“…A detailed cross‐section analysis of the chemical composition of sprayed Cu2ZnSnS4 thin films is presented. X‐ray diffraction (XRD), energy dispersive…”
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The relevance of integrating multiple sensory modalities into capturing devices: The case of the global pest Sirex noctilio
Published in Agricultural and forest entomology (23-07-2024)“…Abstract Sirex noctilio is an invasive forest wasp that affects pines in many parts of the globe and can result in severe economic losses. Current trapping…”
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Cross‐Section Analysis of the Composition of Sprayed Cu 2 ZnSnS 4 Thin Films by XPS, EDS, and Multi‐Wavelength Raman Spectroscopy
Published in Physica status solidi. A, Applications and materials science (01-12-2018)“…A detailed cross‐section analysis of the chemical composition of sprayed Cu 2 ZnSnS 4 thin films is presented. X‐ray diffraction (XRD), energy dispersive…”
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Mesoporous Thin Films for Acoustic Devices in the Gigahertz Range
Published in Journal of physical chemistry. C (06-08-2020)“…The coherent manipulation of acoustic waves on the nanoscale usually requires multilayers with thicknesses and interface roughness defined down to the atomic…”
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Confined longitudinal acoustic phonon modes in free-standing Si membranes coherently excited by femtosecond laser pulses
Published in Physical review. B, Condensed matter and materials physics (01-05-2009)“…In this Rapid Communication we report the first time-resolved measurements of confined acoustic phonon modes in free-standing Si membranes excited by fs laser…”
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Imaging of a patterned and buried molecular layer by coherent acoustic phonon spectroscopy
Published in Applied physics letters (05-11-2012)“…A molecular layer of aminopropyltriethoxysilane is patterned with a focused ion beam and subsequently covered by a gold film. The gold-polymer-substrate…”
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Ashes in the air: the effects of volcanic ash emissions on plant–pollinator relationships and possible consequences for apiculture
Published in Apidologie (01-05-2013)“…Pollinator foraging performance could be altered by volcanic ash contaminated flowers, pollen, and nectar. We used the honeybee (Apis mellifera) as a model…”
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Critical coupling to Tamm plasmons
Published 03-11-2014“…The conditions of critical coupling of light to Tamm plasmons are investigated with comprehensive numerical simulations, highlighting the parameters that…”
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Optical generation of a broadband acoustic frequency comb in the 100 GHz-regime
Published in 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC (01-05-2013)“…Acoustic properties in the GHz frequency range are not very well understood for most semiconductors although intrinsic attenuation and scattering at interfaces…”
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Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics
Published 06-12-2010“…We have investigated the time-resolved vibrational properties of terahertz quantum cascade lasers by means of ultra-fast laser spectroscopy. By the observation…”
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