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Picosecond Control of Quantum Dot Laser Emission by Coherent Phonons (2017)
Journal Article
Czerniuk, T., Wigger, D., Akimov, A., Schneider, C., Kamp, M., Höfling, S., Yakovlev, D., Kuhn, T., Reiter, D., & Bayer, M. (2017). Picosecond Control of Quantum Dot Laser Emission by Coherent Phonons. Physical Review Letters, 118(13), Article 133901. https://doi.org/10.1103/PhysRevLett.118.133901

© 2017 American Physical Society. American Physical Society. A picosecond acoustic pulse can be used to control the lasing emission from semiconductor nanostructures by shifting their electronic transitions. When the active medium, here an ensemble o... Read More about Picosecond Control of Quantum Dot Laser Emission by Coherent Phonons.

Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode (2017)
Journal Article
Srikanthreddy, D., Glavin, B., Poyser, C. L., Henini, M., Lehmann, D., Jasiukiewicz, C., Akimov, A. V., & Kent, A. (in press). Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode. Physical Review Applied, 7(2), Article 024014. https://doi.org/10.1103/PhysRevApplied.7.024014

We study the generation of microwave electronic signals by pumping a (311) GaAs Schottky diode with compressive and shear acoustic phonons, generated by femtosecond optical excitation of an Al _lm transducer and mode conversion at the Al-GaAs interfa... Read More about Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode.

Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N (2017)
Journal Article
Czerniuk, T., Ehrlich, T., Wecker, T., As, D., Yakovlev, D., Akimov, A., & Bayer, M. (2017). Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N. Physical Review Applied, 7(1), Article 014006. https://doi.org/10.1103/PhysRevApplied.7.014006

A picosecond acoustic pulse is used to study the photoelastic interaction in single zinc-blende GaN/AlxGa1−xN quantum wells. We use an optical time-resolved pump-probe setup and demonstrate that tuning the photon energy to the quantum well’s lowest e... Read More about Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N.

Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device (2016)
Journal Article
Heywood, S. L., Glavin, B. A., Beardsley, R., Akimov, A. V., Carr, M. W., Norman, J., Norton, P. C., Prime, B., Priestley, N., & Kent, A. J. (in press). Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device. Scientific Reports, 6, Article 30396. https://doi.org/10.1038/srep30396

We demonstrate heterodyne mixing of a 94 GHz millimetre wave photonic signal, supplied by a Gunn diode oscillator, with coherent acoustic waves of frequency ~ 100 GHz, generated by pulsed laser excitation of a semiconductor surface. The mixing takes... Read More about Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device.

Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films (2016)
Journal Article
Kats, V. N., Linnik, T. L., Salasyuk, A. S., Rushforth, A. W., Wang, M., Wadley, P., Akimov, A. V., Cavill, S. A., Holy, V., Kalashnikova, A. M., & Scherbakov, A. V. (2016). Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films. Proceedings of SPIE, 9835(98351Q), https://doi.org/10.1117/12.2238020

Spin-lattice coupling is one of the most prominent interactions mediating response of spin ensemble to ultrafast optical excitation. Here we exploit optically generated coherent and incoherent phonons to drive coherent spin dynamics, i.e. precession,... Read More about Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films.

Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films (2016)
Journal Article
Kats, V., Linnik, T., Salasyuk, A., Rushforth, A., Wang, M., Wadley, P., Akimov, A. V., Cavill, S., Holy, V., Kalashnikova, A., & Scherbakov, A. (2016). Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films. Physical Review B, 93(21), Article 214422. https://doi.org/10.1103/PhysRevB.93.214422

Ultrafast optical excitation of a metal ferromagnetic film results in a modification of the magnetocrystalline anisotropy and induces the magnetization precession. We consider two main contributions to these processes: an effect of noncoherent phonon... Read More about Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films.

Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire (2016)
Journal Article
Beardsley, R., Akimov, A. V., Greener, J. D., Mudd, G. W., Sandeep, S., Kudrynskyi, Z. R., Kovalyuk, Z. D., Patanè, A., & Kent, A. J. (2016). Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire. Scientific Reports, 6, https://doi.org/10.1038/srep26970

Van der Waals (vdW) layered crystals and heterostructures have attracted substantial interest for potential applications in a wide range of emerging technologies. An important, but often overlooked, consideration in the development of implementable d... Read More about Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire.

Resonant driving of magnetization precession in a ferromagnetic layer by coherent monochromatic phonons (2015)
Journal Article
Jäger, J., Scherbakov, A., Glavin, B., Salasyuk, A., Campion, R., Rushforth, A., Yakovlev, D., Akimov, A. V., & Bayer, M. (2015). Resonant driving of magnetization precession in a ferromagnetic layer by coherent monochromatic phonons. Physical review B: Condensed matter and materials physics, 92(2), https://doi.org/10.1103/PhysRevB.92.020404

We realize resonant driving of the magnetization precession by monochromatic phonons in a thin ferromagnetic layer embedded into a phononic Fabry-Pérot resonator. A femtosecond laser pulse excites resonant phonon modes of the structure in the 10−40 G... Read More about Resonant driving of magnetization precession in a ferromagnetic layer by coherent monochromatic phonons.

Coherent phonon optics in a chip with an electrically controlled active device (2015)
Journal Article
Akimov, A., Poyser, C. L., Kent, A. J., & CAMPION, R. (2015). Coherent phonon optics in a chip with an electrically controlled active device. Scientific Reports, 5, Article 8279. https://doi.org/10.1038/srep08279

Phonon optics concerns operations with high-frequency acoustic waves in solid media in a similar way to how traditional optics operates with the light beams (i.e. photons). Phonon optics experiments with coherent terahertz and sub-terahertz phonons p... Read More about Coherent phonon optics in a chip with an electrically controlled active device.