PDI -> Staff ->

Dr. Lutz Geelhaar

Head of Department Epitaxy

Lutz Geelhaar

phone: +49 30 20377 359

room: 0714

email: geelhaar@pdi-berlin.de

 

Department: Epitaxy

Core research areas: Nanofabrication , III-V nanowires for optoelectronics

 

 

71 Author P. Schroth , M. Köhl , J.-W. Hornung , E. Dimakis , C. Somaschini , L. Geelhaar , A. Biermanns , S. Bauer , S. Lazarev , U. Pietsch , T. Baumbach
Title

Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in-situ X-ray diffraction

Source Phys. Rev. Lett. , 114 , 055504 ( 2015 )
DOI : 10.1103/PhysRevLett.114.055504 | Download: PDF | 2547 Cite : Bibtex RIS
P. Schroth, M. Köhl, J.-W. Hornung, E. Dimakis, C. Somaschini, L. Geelhaar, A. Biermanns, S. Bauer, S. Lazarev, U. Pietsch, and T. Baumbach

72 Author G. Bussone , H. Schäfer-Eberwein , E. Dimakis , A. Biermanns , D. Carbone , A. Tahraoui , L. Geelhaar , P. HaringBolívar , T. U. Schülli , U. Pietsch
Title

Correlation of electrical and structural properties of single as-grown GaAs nanowires on Si (111) substrates

Source Nano Lett. , 15 , 981 ( 2015 )
DOI : 10.1021/nl5037879 | 2662 Cite : Bibtex RIS
G. Bussone, H. Schäfer-Eberwein, E. Dimakis, A. Biermanns, D. Carbone, A. Tahraoui, L. Geelhaar, P. HaringBolívar, T. U. Schülli, and U. Pietsch

73 Author O. Romanyuk , S. Fernández-Garrido , P. Jiricek , I. Bartos , L. Geelhaar , O. Brandt , T. Paskova
Title

Non-destructive assessment of the polarity of GaN nanowire ensembles using low-energy electron diffraction and x-ray photoelectron diffraction

Source Appl. Phys. Lett. , 106 , 021602 ( 2015 )
DOI : 10.1063/1.4905651 | Download: PDF | 2667 Cite : Bibtex RIS
O. Romanyuk, S. Fernández-Garrido, P. Jiricek, I. Bartos, L. Geelhaar, O. Brandt, and T. Paskova

74 Author M. Koehl , P. Schroth , A. A. Minkevich , J.-W. Hornung , E. Dimakis , C. Somaschini , L. Geelhaar , T. Aschenbrenner , S. Lazarev , D. Grigoriev , U. Pietsch , T. Baumbach
Title

Polytypism in GaAs nanowires: Determination of the interplanar spacing of wurtzite GaAs by X-ray diffraction

Source J. Synchrotron Rad. , 22 , 67 ( 2015 )
DOI : 10.1107/S1600577514023480 | Download: PDF | 2653 Cite : Bibtex RIS
M. Koehl, P. Schroth, A. A. Minkevich, J.-W. Hornung, E. Dimakis, C. Somaschini, L. Geelhaar, T. Aschenbrenner, S. Lazarev, D. Grigoriev, U. Pietsch, and T. Baumbach

75 Author J. Kamimura , M. Ramsteiner , L. Geelhaar , H. Riechert
Title

Si doping effects on (In,Ga)N nanowires

Source J. Appl. Phys. , 116 , 244310 ( 2014 )
DOI : 10.1063/1.4905257 | Download: PDF | 2632 Cite : Bibtex RIS
J. Kamimura, M. Ramsteiner, L. Geelhaar, and H. Riechert

76 Author P. Corfdir , C. Hauswald , J. K. Zettler , T. Flissikowski , J. Lähnemann , S. Fernández-Garrido , L. Geelhaar , H. T. Grahn , O. Brandt
Title

Stacking faults as quantum wells in nanowires: Density of states, oscillator strength and radiative efficiency

Source Phys. Rev. B , 90 , 195309 ( 2014 )
DOI : 10.1103/PhysRevB.90.195309 | Download: PDF | 2636 Cite : Bibtex RIS
P. Corfdir, C. Hauswald, J. K. Zettler, T. Flissikowski, J. Lähnemann, S. Fernández-Garrido, L. Geelhaar, H. T. Grahn, and O. Brandt

77 Author A. Biermanns , E. Dimakis , Anton Davydok , Takkuo Sasaki , L. Geelhaar , Masamitu Takahasi , U. Pietsch
Title

Role of liquid indium in the structural purity of wurtzite InAs nanowires that grow on Si(111)

Source Nano Lett. , 14 , 6878 ( 2014 )
DOI : 10.1021/nl502878a | 2629 Cite : Bibtex RIS
A. Biermanns, E. Dimakis, Anton Davydok, Takkuo Sasaki, L. Geelhaar, Masamitu Takahasi, and U. Pietsch

78 Author C. Somaschini , A. Biermanns , S. Bietti , G. Bussone , A. Trampert , S. Sanguinetti , H. Riechert , U. Pietsch , L. Geelhaar
Title

Axial InAs/GaAs heterostructures on silicon in a nanowire geometry

Source Nanotechnol. , 25 , 485602 ( 2014 )
DOI : 10.1088/0957-4484/25/48/485602 | 2502 Cite : Bibtex RIS
C. Somaschini, A. Biermanns, S. Bietti, G. Bussone, A. Trampert, S. Sanguinetti, H. Riechert, U. Pietsch, and L. Geelhaar

79 Author S. Fernández-Garrido , V. M. Kaganer , C. Hauswald , B. Jenichen , M. Ramsteiner , V. Consonni , L. Geelhaar , O. Brandt
Title

Correlation between the structural and optical properties of spontaneously formed GaN nanowires: A quantitative evaluation of the impact of nanowire coalescence

Source Nanotechnol. , 25 , 455702 ( 2014 )
DOI : 10.1088/0957-4484/25/45/455702 | Download arXiv: 1409.3773 | 2589 Cite : Bibtex RIS
S. Fernández-Garrido, V. M. Kaganer, C. Hauswald, B. Jenichen, M. Ramsteiner, V. Consonni, L. Geelhaar, and O. Brandt

80 Author C. Hauswald , P. Corfdir , J. K. Zettler , V. M. Kaganer , K. K. Sabelfeld , S. Fernández-Garrido , T. Flissikowski , V. Consonni , T. Gotschke , H. T. Grahn , L. Geelhaar , O. Brandt
Title

Origin of the nonradiative decay of bound excitons in GaN nanowires

Source Phys. Rev. B , 90 , 165304 ( 2014 )
DOI : 10.1103/PhysRevB.90.165304 | Download: PDF | 2635 Cite : Bibtex RIS
C. Hauswald, P. Corfdir, J. K. Zettler, V. M. Kaganer, K. K. Sabelfeld, S. Fernández-Garrido, T. Flissikowski, V. Consonni, T. Gotschke, H. T. Grahn, L. Geelhaar, and O. Brandt