23 citations · 92 across the 11 of their papers we have counts for
11 papers
Magnetic- and electric-field-induced anomalous Hall currents from optical excitation of Landau transitions in bulk GaAs
Christoph Dresler, Shekhar Priyadarshi, Mark Bieler
We study a certain type of anomalous Hall current in magnetically- and electrically-biased bulk GaAs samples under the formation of Landau levels. The currents are generated by ult…
Cryogenic fiber-coupled electro-optic characterization platform for high-speed photodiodes
Shekhar Priyadarshi, Hao Tian, Alexander Fernandez Scarioni +5
We have developed a cryogenic characterization platform for ultrafast photodiodes, whose time domain responses are extracted by electro-optic sampling using femtosecond laser pulse…
Optical creation and annihilation of skyrmion patches in a bulk chiral magnet
Jantje Kalin, Sibylle Sievers, Daniel Kalin +6
A key challenge for the realization of future skyrmion devices comprises the controlled creation, annihilation and detection of these topologically non-trivial magnetic spin textur…
Uncertainty Analysis of Stray Field Measurements by Quantitative Magnetic Force Microscopy
Xiukun Hu, Gaoliang Dai, Sibylle Sievers +4
Magnetic force microscopy (MFM) measurements generally provide phase images which represent the signature of domain structures on the surface of nanomaterials. To quantitatively de…
Optical and RF Metrology for 5G
David A. Humphreys, Irshaad Fatadin, Mark Bieler +2
Specification standards will soon be available for 5G mobile RF communications. What optical and electrical metrology is needed or available to support the development of the suppo…
Ultrafast magneto-photocurrents as probe of anisotropy relaxation in GaAs
Christian B. Schmidt, Shekhar Priyadarshi, Klaus Pierz +1
We induce ultrafast photocurrents in a GaAs crystal exposed to a magnetic field by optical femtosecond excitation. The magneto-photocurrents are studied by time-resolved detection…
Detection of the anomalous velocity with sub-picosecond time resolution in semiconductor nanostructures
Shekhar Priyadarshi, Klaus Pierz, Mark Bieler
We report on the time-resolved detection of the anomalous velocity, constituting charge carriers moving perpendicular to an electric driving field, in undoped GaAs quantum wells. F…
Ultrafast magneto-photocurrents in GaAs: Separation of surface and bulk contributions
Christian B. Schmidt, Shekhar Priyadarshi, Sergey A. Tarasenko +1
We induce ultrafast magneto-photocurrents in a GaAs crystal employing interband excitation with femtosecond laser pulses at room temperature and non-invasively separate surface and…
THz beam steering by optical coherent control
Heiko Füser, Mark Bieler
We demonstrate optical coherent control of the emission direction of THz radiation. Femtosecond laser pulses are used to excite different types of ultrafast photocurrents along dif…
All-optically induced currents resulting from frequency modulated coherent polarization
Shekhar Priyadarshi, Klaus Pierz, Mark Bieler
We employ polarization-shaped ultrafast optical pulses to generate photocurrents which only arise if the optically induced coherent polarization is frequency modulated. This freque…
All-optically induced ultrafast photocurrents: Beyond the instantaneous coherent response
Shekhar Priyadarshi, Klaus Pierz, Mark Bieler
It is demonstrated that the non-instantaneous response of the optically induced coherent polarization tremendously influences the real-space shift of electronic charges in semicond…