PDI -> Staff ->

Prof. Dr. Holger T. Grahn

Head of Department Semiconductor Spectroscopy

Holger T. Grahn

phone: +49 30 20377 318

phone mobile: 602

room: 0517

email: htgrahn@pdi-berlin.de

 

Department: Semiconductor Spectroscopy

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

 

 

61 Author X. Lü , M. Wienold , L. Schrottke , K. Biermann , H.T. Grahn
Title

Mid-infrared-pumped, electrically driven terahertz quantum laser: enhanced pumping efficiency and prevention of electric-field domains

Source J. Appl. Phys. , 113 , 033103 ( 2013 )
Download: PDF | 2378 Cite : Bibtex RIS
X. Lü, M. Wienold, L. Schrottke, K. Biermann, and H.T. Grahn

62 Author R. Sharma , L. Schrottke , M. Wienold , K. Biermann , A. Tahraoui , H.T. Grahn
Title

Influence of post-growth rapid thermal annealing on the transport and lasing characteristics of terahertz quantum-cascade lasers

Source J. Phys. D , 46 , 305107 ( 2013 )
2379 Cite : Bibtex RIS
R. Sharma, L. Schrottke, M. Wienold, K. Biermann, A. Tahraoui, and H.T. Grahn

63 Author Y. J. Cho , X. Lue , M. Wienold , M. Ramsteiner , H.T. Grahn , O. Brandt
Title

Auger recombination as the dominant nonradiative recombination channel in InN

Source Phys. Rev. B , 87 , 155203 ( 2013 )
Download: PDF | 2381 Cite : Bibtex RIS
Y. J. Cho, X. Lue, M. Wienold, M. Ramsteiner, H.T. Grahn, and O. Brandt

64 Author O. Brandt , P. Misra , T. Flissikowski , H.T. Grahn
Title

Excitation polarization anisotropy of the spontaneous emission from an M-plane GaN film: Competition between hole relaxation and exciton recombination

Source Phys. Rev. B , 87 , 165308 ( 2013 )
Download: PDF | 2382 Cite : Bibtex RIS
O. Brandt, P. Misra, T. Flissikowski, and H.T. Grahn

65 Author N. Rothbart , H. Richter , M. Wienold , L. Schrottke , H.T. Grahn , H.-W. Hübers
Title

Fast 2D and 3D terahertz imaging with a quantum-cascade laser and a scanning mirror

Source IEEE Trans. Terahertz Sci. Technol. , 3 , 617 ( 2013 )
2398 Cite : Bibtex RIS
N. Rothbart, H. Richter, M. Wienold, L. Schrottke, H.T. Grahn, and H.-W. Hübers

66 Author O. Krüger , S. Kreutzmann , D. Prasai , M. Wienold , R. Sharma , W. Pittroff , L. Weixelbaum , W. John , K. Biermann , L. Schrottke , F. Schnieder , G. Erbert , H.T. Grahn , G. Tränkle
Title

Epitaxial-side mounting of terahertz quantum-cascade lasers for improved heat management

Source IEEE Photon. Technol. Lett. , 25 , 1570 ( 2013 )
2402 Cite : Bibtex RIS
O. Krüger, S. Kreutzmann, D. Prasai, M. Wienold, R. Sharma, W. Pittroff, L. Weixelbaum, W. John, K. Biermann, L. Schrottke, F. Schnieder, G. Erbert, H.T. Grahn, and G. Tränkle

67 Author Y. Y. Huang , W. Li , W. Q. Ma , H. Qin , H.T. Grahn , Y. H. Zhang
Title

Spontaneous quasi-periodic current self-oscillations in a weakly coupled GaAs/(Al,Ga)As superlattice at room temperature

Source Appl. Phys. Lett. , 102 , 242107 ( 2013 )
Download: PDF | 2414 Cite : Bibtex RIS
Y. Y. Huang, W. Li, W. Q. Ma, H. Qin, H.T. Grahn, and Y. H. Zhang

68 Author W.-H. Lin , W. Jahn , H.T. Grahn , L. W. Chang, , M. M. C. Chou , J.-J. Wu
Title

Spectral and spatial luminescence distribution of m-plane ZnO epitaxial films containing stacking faults: A cathodoluminescence study

Source Appl. Phys. Express , 6 , 061101 ( 2013 )
2417 Cite : Bibtex RIS
W.-H. Lin, W. Jahn, H.T. Grahn, L. W. Chang,, M. M. C. Chou, and J.-J. Wu

69 Author C. Hauswald , T. Flissikowski , T. Gotschke , R. Calarco , L. Geelhaar , H.T. Grahn , O. Brandt
Title

Coupling of exciton states as the origin of their biexponential decay dynamics in GaN nanowires

Source Phys. Rev. B , 88 , 075312 ( 2013 )
Download: PDF | 2421 Cite : Bibtex RIS
C. Hauswald, T. Flissikowski, T. Gotschke, R. Calarco, L. Geelhaar, H.T. Grahn, and O. Brandt

70 Author M. Wienold , A. Tahraoui , L. Schrottke , R. Sharma , X. Lü , K. Biermann , R. Hey , H.T. Grahn
Title

Lateral distributed-feedback gratings for single-mode, high-power terahertz quantum-cascade lasers

Source Opt. Express , 20 , 11207 ( 2012 )
Download: PDF | 2277 Cite : Bibtex RIS
M. Wienold, A. Tahraoui, L. Schrottke, R. Sharma, X. Lü, K. Biermann, R. Hey, and H.T. Grahn