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List of works by Manfred Helm

A simple route to synchronized nucleation of self-catalyzed GaAs nanowires on silicon for sub-Poissonian length distributions

scientific article published on 21 September 2018

All-THz pump-probe spectroscopy of the intersubband AC-Stark effect in a wide GaAs quantum well

scientific article published on 01 August 2020

Anisotropy of excitation and relaxation of photogenerated charge carriers in graphene

scientific article published on 24 February 2014

Carbon p electron ferromagnetism in silicon carbide

scientific article

Carrier dynamics in Landau-quantized graphene featuring strong Auger scattering

Defect-induced magnetism in SiC: Interplay between ferromagnetism and paramagnetism ⬇️

scholarly article in Physical Review B, vol. 92 no. 17, November 2015

Defect-induced magnetism in graphite through neutron irradiation ⬇️

scholarly article in Physical Review B, vol. 90 no. 21, December 2014

Defects in zinc-implanted ZnO thin films

Demonstration of a Broadband Photodetector Based on a Two-Dimensional Metal-Organic Framework

scientific article published on 23 January 2020

Disentangling defect-induced ferromagnetism in SiC ⬇️

scholarly article in Physical Review B, vol. 89 no. 1, January 2014

Effective Hexagonal Boron Nitride Passivation of Few-Layered InSe and GaSe to Enhance Their Electronic and Optical Properties

scientific article published on 07 November 2019

Electron dynamics in In x Ga1-x As shells around GaAs nanowires probed by terahertz spectroscopy

scientific article published on 21 February 2019

Electronic phase separation in insulating (Ga,Mn)As with low compensation: Super-paramagnetism and hopping conduction.

scientific article published on 22 January 2018

Engineering telecom single-photon emitters in silicon for scalable quantum photonics

scientific article published on 01 August 2020

Faceted nanostructure arrays with extreme regularity by self-assembly of vacancies.

scientific article published on 11 September 2015

Fano signatures between intersubband and ponderomotive responses in MQW structures

scientific article published on 01 September 2018

Fast intraband capture and relaxation in InAs/GaAs self-assembled quantum dots

Ferromagnetic GaMnP Prepared by Ion Implantation and Pulsed Laser Annealing

Ferromagnetic Mn-Implanted GaP: Microstructures vs Magnetic Properties.

scientific article published on 22 January 2016

Forming-free resistive switching in multiferroic BiFeO3 thin films with enhanced nanoscale shunts

scientific article

Four-Wave Mixing in Landau-Quantized Graphene.

scientific article published on 24 February 2017

Gold nanoparticle tips for optical field confinement in infrared scattering near-field optical microscopy

scientific article published in August 2008

Improved electrode design for interdigitated large-area photoconductive terahertz emitters

scientific article published on 01 April 2019

InP nanocrystals on silicon for optoelectronic applications.

scientific article published on 9 November 2012

Interaction between magnetic moments and itinerant carriers in d0 ferromagnetic SiC

scholarly article in Physical Review B, vol. 95 no. 19, May 2017

Intersublevel spectroscopy on single InAs-quantum dots by terahertz near-field microscopy

scientific article

Intraband carrier dynamics in Landau-quantized multilayer epitaxial graphene

Key concepts behind forming-free resistive switching incorporated with rectifying transport properties

scientific article

Large area photoconductive terahertz emitter for 1.55 μm excitation based on an InGaAs heterostructure

scientific article

Light-Induced Switching of Tunable Single-Molecule Junctions

scientific article (publication date: May 2015)

Long intersubband relaxation times in n-type germanium quantum wells

scholarly article by Michele Ortolani et al published 14 November 2011 in Applied Physics Letters

Magnetic Mn5Ge3 nanocrystals embedded in crystalline Ge: a magnet/semiconductor hybrid synthesized by ion implantation ⬇️

scientific article published on September 25, 2012

Magnetic and transport properties of Cu1.05Cr0.89 Mg0.05O2 and Cu0.96Cr0.95 Mg0.05Mn0.04O2 films

Molecular Electronics: Light‐Induced Switching of Tunable Single‐Molecule Junctions (Adv. Sci. 5/2015).

scientific article published on 13 May 2015

Monovacancy paramagnetism in neutron-irradiated graphite probed by <sup>13</sup>C NMR.

scientific article published on 18 September 2017

Non-plasmonic improvement in photoconductive THz emitters using nano- and micro-structured electrodes

scientific article published on 01 November 2020

Nonlinear Charge Transport in InGaAs Nanowires at Terahertz Frequencies

scientific article published on 03 April 2020

Observation of the Intraexciton Autler-Townes Effect in GaAs / AlGaAs Semiconductor Quantum Wells

scientific article (publication date: 12 October 2010)

On the insulator-to-metal transition in titanium-implanted silicon.

scientific article published on 7 March 2018

Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device.

scientific article

Paramagnetism in Co-doped ZnO films

Passively mode-locked Tm,Ho:YAG laser at 2 microm based on saturable absorption of intersubband transitions in quantum wells

scientific article

Plasmonic efficiency enhancement at the anode of strip line photoconductive terahertz emitters

scientific article published on 01 October 2016

Plasmonic superlensing in doped GaAs

scientific article published on 14 January 2015

Publisher's Note: Symmetry-Breaking Supercollisions in Landau-Quantized Graphene [Phys. Rev. Lett. 119, 067405 (2017)]

scientific article published on 01 June 2018

Quantitative determination of the charge carrier concentration of ion implanted silicon by IR-near-field spectroscopy ⬇️

scientific article published on December 6, 2010

Resonant Impurity Bands in Semiconductor Superlattices

scientific article published on 12 December 2005

Reverse epitaxy of Ge: ordered and faceted surface patterns.

scientific article published on 3 July 2013

Room temperature ferromagnetism in carbon-implanted ZnO

article published in 2008

Room-temperature short-wavelength infrared Si photodetector.

scientific article

Spin Manipulation in Co-Doped ZnO

scientific article published on 11 August 2008

Study of Si implantation into Mg-doped GaN for MOSFETs

Symmetry-Breaking Supercollisions in Landau-Quantized Graphene

scientific article published on 10 August 2017

Temperature stable 13 μm emission from GaAs ⬇️

scientific article published on 01 November 2012

Terahertz absorption-saturation and emission from electron-doped germanium quantum wells

scientific article published on 01 March 2020

Terahertz nonlinear optics using intra-excitonic quantum well transitions: Sideband generation and AC Stark splitting

Thermally assisted all-optical helicity dependent magnetic switching in amorphous Fe(100-x)Tb(x) alloy films

scientific article

Towards diluted magnetism in TaAs

Tunable narrowband THz pulse generation in scalable large area photoconductive antennas ⬇️

scientific article published on September 26, 2011

Ultra-doped n-type germanium thin films for sensing in the mid-infrared

scientific article published on 10 June 2016

Ultra-fast annealing manipulated spinodal nano-decomposition in Mn-implanted Ge

scientific article published on 30 November 2018

Ultrafast response of photoexcited carriers in VO2 at high-pressure

Unconventional double-bended saturation of carrier occupation in optically excited graphene due to many-particle interactions.

scientific article

Universal ultrafast detector for short optical pulses based on graphene

scientific article published on 01 November 2015

Up to 70 THz bandwidth from an implanted Ge photoconductive antenna excited by a femtosecond Er:fibre laser

scientific article published on 03 March 2020

Widely tunable GaAs bandgap via strain engineering in core/shell nanowires with large lattice mismatch

scientific article published on 26 June 2019

n-InAs nanopyramids fully integrated into silicon

scientific article published on 06 June 2011

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