Dr. Lutz Geelhaar

Acting Director

Head of Department Epitaxy

Lutz Geelhaar

Telefon: +49 30 20377 359

Raum: 0714

Email: geelhaar@pdi-berlin.de

 

Abteilung: Epitaxy

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

 

 

11 Autor F. Bastiman , H. Küpers , C. Somaschini , V.G. Dubrovskii , L. Geelhaar
Titel

Analysis of incubation time preceding the Ga-assisted nucleation and growth of GaAs nanowires on Si(111)

Source Phys. Rev. Mater. , 3 , 073401 ( 2019 )
DOI : 10.1103/PhysRevMaterials.3.073401 | arxiv: 1907.04249 | 3081 Cite : Bibtex RIS
F. Bastiman, H. Küpers, C. Somaschini, V.G. Dubrovskii, and L. Geelhaar

12 Autor D. v. Treeck , J. Ledig , G. Scholz , J. Lähnemann , M. Musolino , A. Tahraoui , O. Brandt , A. Waag , H. Riechert , L. Geelhaar
Titel

Electroluminescence and current-voltage measurements of single (In,Ga)N/GaN nanowire light-emitting diodes in the nanowire ensemble

Source Beilstein J. Nanotechnol. , 10 , 1177 ( 2019 )
DOI : 10.3762/bjnano.10.117 | 3047 Cite : Bibtex RIS
D. v. Treeck, J. Ledig, G. Scholz, J. Lähnemann, M. Musolino, A. Tahraoui, O. Brandt, A. Waag, H. Riechert, and L. Geelhaar

13 Autor Philipp Schroth , Mahmoud Al Humaidi , Ludwig Feigl , Julian Jakob , Ali Al Hassan , Arman Davtyan , Hanno Küpers , A. Tahraoui , L. Geelhaar , Ullrich Pietsch , Tilo Baumbach
Titel

Impact of the Shadowing Effect on the Crystal Structure of Patterned Self-Catalyzed GaAs Nanowires

Source Nano Lett. , 19 , 4263 ( 2019 )
DOI : 10.1021/acs.nanolett.9b00380 | 3123 Cite : Bibtex RIS
Philipp Schroth, Mahmoud Al Humaidi, Ludwig Feigl, Julian Jakob, Ali Al Hassan, Arman Davtyan, Hanno Küpers, A. Tahraoui, L. Geelhaar, Ullrich Pietsch, and Tilo Baumbach

14 Autor J. Lähnemann , M. O. Hill , J. Herranz , O. Marquardt , G. Gao , A. Al Hassan , A. Davtyan , S. O. Hruszkewycz , M. V. Holt , C. Huang , I. Calvo-Almazán , U. Jahn , U. Pietsch , L. J. Lauhon , L. Geelhaar
Titel

Correlated nanoscale analysis of the emission from wurtzite versus zincblende (In,Ga)As/GaAs nanowire core-shell quantum wells

Source Nano Lett. , 19 , 4448 ( 2019 )
DOI : 10.1021/acs.nanolett.9b01241 | arxiv: 1903.07372 | 3094 Cite : Bibtex RIS
J. Lähnemann, M. O. Hill, J. Herranz, O. Marquardt, G. Gao, A. Al Hassan, A. Davtyan, S. O. Hruszkewycz, M. V. Holt, C. Huang, I. Calvo-Almazán, U. Jahn, U. Pietsch, L. J. Lauhon, and L. Geelhaar

15 Autor 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
Titel

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

Source Nanotechnol. , 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

16 Autor M. Sobanska , Z. R. Zytkiewicz , G. Calabrese , L. Geelhaar , S. Fernández-Garrido
Titel

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

Source Nanotechnol. , 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

17 Autor H. Küpers , P. Corfdir , R. B. Lewis , T. Flissikowski , A. Tahraoui , H. T. Grahn , O. Brandt , L. Geelhaar
Titel

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 RRL , 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

18 Autor G. Calabrese , G. Gao , D. v. Treeck , P. Corfdir , C. Sinito , T. Auzelle , A. Trampert , L. Geelhaar , O. Brandt , S. Fernández-Garrido
Titel

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

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

19 Autor P. Corfdir , O. Marquardt , R. B. Lewis , C. Sinito , M. Ramsteiner , A. Trampert , U. Jahn , L. Geelhaar , O. Brandt , V. M. Fomin
Titel

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

20 Autor Ali Al-Hassan , Arman Davtyan , H. Küpers , R. B. Lewis , Danial Bahrami , F. Bertram , Genziana Bussone , C. Richter , L. Geelhaar , Ullrich Pietsch
Titel

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, Arman Davtyan, H. Küpers, R. B. Lewis, Danial Bahrami, F. Bertram, Genziana Bussone, C. Richter, L. Geelhaar, and Ullrich Pietsch