PDI -> Staff ->

Dr. Lutz Geelhaar

Acting Director

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

 

 

21 Author L. Mancini , M. Morassi , C. Sinito , O. Brandt , L. Geelhaar , H.G. Song , Y.H. Cho , N. Guan , A. Madouri , C. Barbier , L. Largeau , A. Babichev , F.H. Julien , L. Travers , F. Oehler , N. Gogneau , J.C. Harmand , M. Tchernycheva
Title

Optical properties of GaN Nanowires grown on chemical vapor deposited-Graphene

Source Nanotechnology , 30 , 214005 ( 2019 )
DOI : 10.1088/1361-6528/ab0570 | 3088 Cite : Bibtex RIS
L. Mancini, M. Morassi, C. Sinito, O. Brandt, L. Geelhaar, H.G. Song, Y.H. Cho, N. Guan, A. Madouri, C. Barbier, L. Largeau, A. Babichev, F.H. Julien, L. Travers, F. Oehler, N. Gogneau, J.C. Harmand, and M. Tchernycheva

22 Author M. Sobanska , Z. R. Zytkiewicz , G. Calabrese , L. Geelhaar , S. Fernández-Garrido
Title

Comprehensive analysis of the self-assembled formation of GaN nanowires on amorphous AlxOy: in situ quadrupole mass spectrometry studies

Source Nanotechnology , 30 , 154002 ( 2019 )
DOI : 10.1088/1361-6528/aafe17 | 3099 Cite : Bibtex RIS
M. Sobanska, Z. R. Zytkiewicz, G. Calabrese, L. Geelhaar, and S. Fernández-Garrido

23 Author H. Küpers , P. Corfdir , R. B. Lewis , T. Flissikowski , A. Tahraoui , H. T. Grahn , O. Brandt , L. Geelhaar
Title

Impact of outer shell structure and localization effects on charge carrier dynamics in GaAs/(In,Ga)As nanowire core-shell quantum wells

Source Phys. Status Solidi-Rapid Res. Lett. , 13 , 1800527 ( 2019 )
DOI : 10.1002/pssr.201800527 | 3033 Cite : Bibtex RIS
H. Küpers, P. Corfdir, R. B. Lewis, T. Flissikowski, A. Tahraoui, H. T. Grahn, O. Brandt, and L. Geelhaar

24 Author G. Calabrese , G. Gao , D. van Treeck , P. Corfdir , C. Sinito , T. Auzelle , A. Trampert , L. Geelhaar , O. Brandt , S. Fernández-Garrido
Title

Interfacial reactions during the molecular beam epitaxy of GaN nanowires on Ti/Al2O3

Source Nanotechnology , 30 , 114001 ( 2019 )
DOI : 10.1088/1361-6528/aaf9c5 | 3072 Cite : Bibtex RIS
G. Calabrese, G. Gao, D. van Treeck, P. Corfdir, C. Sinito, T. Auzelle, A. Trampert, L. Geelhaar, O. Brandt, and S. Fernández-Garrido

25 Author P. Corfdir , O. Marquardt , R. B. Lewis , C. Sinito , M. Ramsteiner , A. Trampert , U. Jahn , L. Geelhaar , O. Brandt , V. M. Fomin
Title

Excitonic Aharonov-Bohm oscillations in core-shell nanowires

Source Adv. Mater. , 31 , 1805645 ( 2019 )
DOI : 10.1002/adma.201805645 | 3041 Cite : Bibtex RIS
P. Corfdir, O. Marquardt, R. B. Lewis, C. Sinito, M. Ramsteiner, A. Trampert, U. Jahn, L. Geelhaar, O. Brandt, and V. M. Fomin

26 Author Ali Al-Hassan , A. Davtyan , H. Küpers , R. B. Lewis , D. Bahrami , F. Bertram , Genziana Bussone , C. Richter , L. Geelhaar , U. Pietsch
Title

Complete structural and strain analysis of single GaAs/(In,Ga)As/GaAs core-shell-shell nanowires by means of in-plane and out-of-plane x-ray nano-diffraction

Source J. Appl. Cryst. , 51 , 1387 ( 2018 )
DOI : 10.1107/S1600576718011287 | 3066 Cite : Bibtex RIS
Ali Al-Hassan, A. Davtyan, H. Küpers, R. B. Lewis, D. Bahrami, F. Bertram, Genziana Bussone, C. Richter, L. Geelhaar, and U. Pietsch

27 Author L. Hüttenhofer , R. B. Lewis , S. Rauwerdink , A. Tahraoui , H. Küpers , L. Geelhaar , O. Marquardt , S. Ludwig
Title

Optimization of ohmic contacts to n-type GaAs nanowires

Source Phys. Rev. Appl. , 10 , 034024 ( 2018 )
DOI : 10.1103/PhysRevApplied.10.034024 | Download arXiv: 1711.08284 | 2988 Cite : Bibtex RIS
L. Hüttenhofer, R. B. Lewis, S. Rauwerdink, A. Tahraoui, H. Küpers, L. Geelhaar, O. Marquardt, and S. Ludwig

28 Author A. Senichev , P. Corfdir , O. Brandt , M. Ramsteiner , S. Breuer , J. Schilling , L. Geelhaar , P. Werner
Title

Electronic properties of wurtzite GaAs: A correlated structural, optical, and theoretical analysis of the same polytypic GaAs nanowire

Source Nano Res. , 11 , 4708 ( 2018 )
DOI : 10.1007/s12274-018-2053-5 | 3036 Cite : Bibtex RIS
A. Senichev, P. Corfdir, O. Brandt, M. Ramsteiner, S. Breuer, J. Schilling, L. Geelhaar, and P. Werner

29 Author E. Courtade , B. Han , S.Nakhaie , C. Robert , X. Marie , P. Renucci , T. Taniguchi , K. Watanabe , L. Geelhaar , J. M. J. Lopes , B. Urbaszek
Title

Spectrally narrow exciton luminescence from monolayer MoS2 and MoSe2 exfoliated onto epitaxially grown hexagonal BN

Source Appl. Phys. Lett. , 113 , 032106 ( 2018 )
DOI : 10.1063/1.5033554 | Download: PDF | 3051 Cite : Bibtex RIS
E. Courtade, B. Han, S.Nakhaie, C. Robert, X. Marie, P. Renucci, T. Taniguchi, K. Watanabe, L. Geelhaar, J. M. J. Lopes, and B. Urbaszek

30 Author A. Davtyan , V. Favre-Nicolin , R. B. Lewis , H. Küpers , L. Geelhaar , D. Kriegner , D. Bahrami , A. Al-Hassan , G. Chahine , O. Loffeld , U. Pietsch
Title

Coherent X-ray diffraction imaging meets ptychography to study core-shell-shell nanowires

Source MRS Advances , 3 , 2317 ( 2018 )
DOI : 10.1557/adv.2018.466 | 3038 Cite : Bibtex RIS
A. Davtyan, V. Favre-Nicolin, R. B. Lewis, H. Küpers, L. Geelhaar, D. Kriegner, D. Bahrami, A. Al-Hassan, G. Chahine, O. Loffeld, and U. Pietsch