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

 

 

1 Autor D. Bahrami , A. Al Hassan , A. Davtyan , R. Zhe , T. Anjum , J. Herranz , L. Geelhaar , D. V. Novikov , R. Timm , U. Pietsch
Titel

Impact of electrical current on single GaAs nanowire structure

Source Phys. Status Solidi B , tba , xxx ( 2021 )
DOI : 10.1002/pssb.202100056 | 3257 Cite : Bibtex RIS
D. Bahrami, A. Al Hassan, A. Davtyan, R. Zhe, T. Anjum, J. Herranz, L. Geelhaar, D. V. Novikov, R. Timm, and U. Pietsch

2 Autor T. Auzelle , M. Azadmand , T. Flissikowski , M. Ramsteiner , K. Morgenroth , C. Stemmler , S. Fernández-Garrido , S. Sanguinetti , H. T. Grahn , L. Geelhaar , O. Brandt
Titel

Enhanced radiative efficiency in GaN nanowires grown on sputtered TiNx

Source ACS Photonics , x , x ( 2021 )
DOI : 10.1021/acsphotonics.1c00224 | arxiv: 2001.06387 | 3166 Cite : Bibtex RIS
T. Auzelle, M. Azadmand, T. Flissikowski, M. Ramsteiner, K. Morgenroth, C. Stemmler, S. Fernández-Garrido, S. Sanguinetti, H. T. Grahn, L. Geelhaar, and O. Brandt

3 Autor A. Al Hassan , W. A. Salehi , R. B. Lewis , T. Anjum , C. Sternemann , L. Geelhaar , U. Pietsch
Titel

Transition from elastic to plastic strain release in core−shell nanowires revealed by in-plane x-ray diffraction

Source Nanotechnology , 32 , 205705 ( 2021 )
DOI : 10.1088/1361-6528/abe5db | 3244 Cite : Bibtex RIS
A. Al Hassan, W. A. Salehi, R. B. Lewis, T. Anjum, C. Sternemann, L. Geelhaar, and U. Pietsch

4 Autor L. Jaloustre , S. Le-Denmat , T. Auzelle , M. Azadmand , L. Geelhaar , F. Dahlem , R. Songmuang
Titel

Toward Quantitative Measurements of Piezoelectricity in III-N Semiconductor Nanowires

Source ACS Appl. Nano Mater. , 4 , 43 ( 2021 )
DOI : 10.1021/acsanm.0c02078 | arxiv: 1910.01187 | 3243 Cite : Bibtex RIS
L. Jaloustre, S. Le-Denmat, T. Auzelle, M. Azadmand, L. Geelhaar, F. Dahlem, and R. Songmuang

5 Autor J. Kamimura , M. Budde , P. Bogdanoff , C. Tschammer , F. F. Abdi , R. van de Krol , O. Bierwagen , H. Riechert , L. Geelhaar
Titel

Protection Mechanism against Photocorrosion of GaN Photoanodes Provided by NiO Thin Layers

Source Sol. RRL , 4 , 2000568 ( 2020 )
DOI : 10.1002/solr.202000568 | 3172 Cite : Bibtex RIS
J. Kamimura, M. Budde, P. Bogdanoff, C. Tschammer, F. F. Abdi, R. van de Krol, O. Bierwagen, H. Riechert, and L. Geelhaar

6 Autor A. Davtyan , D. Kriegner , V. Holý , A. AlHassan , R.B. Lewis , S. McDermott , L. Geelhaar , D. Bahrami , T. Anjum , Z. Ren , C. Richter , D. Novikov , J. Müller , B. Butz , U. Pietsch
Titel

X-ray diffraction reveals the amount of strain and homogeneity of extremely bent single nanowires

Source J. Appl. Cryst. , 53 , 1310 ( 2020 )
DOI : 10.1107/S1600576720011516 | 3222 Cite : Bibtex RIS
A. Davtyan, D. Kriegner, V. Holý, A. AlHassan, R.B. Lewis, S. McDermott, L. Geelhaar, D. Bahrami, T. Anjum, Z. Ren, C. Richter, D. Novikov, J. Müller, B. Butz, and U. Pietsch

7 Autor Y. Zhao , Z. Xing , L. Geelhaar , J. Zhang , W. Yang , T. Auzelle , Y. Wu , L. Bian , S. Lu
Titel

Detaching highly flexible and transparent (In,Ga)N nanowire films by a low-cost and stable electrochemical procedure

Source ACS Appl. Nano Mater. , 3 , 9943 ( 2020 )
DOI : 10.1021/acsanm.0c01970 | 3202 Cite : Bibtex RIS
Y. Zhao, Z. Xing, L. Geelhaar, J. Zhang, W. Yang, T. Auzelle, Y. Wu, L. Bian, and S. Lu

8 Autor M. Aghaeipour , L. Kasper , J. Herranz , L. Geelhaar , J. Bruns
Titel

Efficient adjustable light couplers of integrated III–V nanowire emitters on silicon waveguides based on ring resonators

Source Opt. Lett. , 45 , 4702 ( 2020 )
DOI : 10.1364/OL.398930 | 3210 Cite : Bibtex RIS
M. Aghaeipour, L. Kasper, J. Herranz, L. Geelhaar, and J. Bruns

9 Autor A. AlHassan , J. Lähnemann , A. Davtyan , M. Al-Humaidi , J. Herranz , D. Bahrami , T. Anjum , F. Bertram , A. B. Dey , L. Geelhaar , U. Pietsch
Titel

Beam damage of single semiconductor nanowires during X-ray nano beam diffraction experiments

Source J. Synchrotron Rad. , 27 , 1200 ( 2020 )
DOI : 10.1107/S1600577520009789 | Download: PDF | 3193 Cite : Bibtex RIS
A. AlHassan, J. Lähnemann, A. Davtyan, M. Al-Humaidi, J. Herranz, D. Bahrami, T. Anjum, F. Bertram, A. B. Dey, L. Geelhaar, and U. Pietsch

10 Autor G. Calabrese , D. van Treeck , V. M. Kaganer , O. Konovalov , P. Corfdir , C. Sinito , L. Geelhaar , O. Brandt , S. Fernández-Garrido
Titel

Radius-Dependent Homogeneous Strain in Uncoalesced GaN Nanowires

Source Acta Mat. , 195 , 87 ( 2020 )
DOI : 10.1016/j.actamat.2020.04.045 | 3147 Cite : Bibtex RIS
G. Calabrese, D. van Treeck, V. M. Kaganer, O. Konovalov, P. Corfdir, C. Sinito, L. Geelhaar, O. Brandt, and S. Fernández-Garrido