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: Intersubband emitters , Nanoanalytics , III-V nanowires for optoelectronics

 

 

61 Author B. Wilsch , U. Jahn , B. Jenichen , J. Lähnemann , H.T. Grahn , H. Wang , H. Yang
Title

Spatially resolved investigation of strain and composition variations in (In,Ga)N/GaN epilayers

Source Appl. Phys. Lett. , 102 , 052109 ( 2013 )
DOI : 10.1063/1.4790591 | Download: PDF | 2380 Cite : Bibtex RIS
B. Wilsch, U. Jahn, B. Jenichen, J. Lähnemann, H.T. Grahn, H. Wang, and H. Yang

62 Author L. Schrottke , M. Wienold , R. Sharma , X. Lü , K. Biermann , R. Hey , A. Tahraoui , H. Richter , H.-W. Hübers , H.T. Grahn
Title

Quantum-cascade lasers as local oscillators for heterodyne spectrometers in the spectral range around 4.745 THz

Source Semicond. Sci. Technol. , 28 , 035011 ( 2013 )
2335 Cite : Bibtex RIS
L. Schrottke, M. Wienold, R. Sharma, X. Lü, K. Biermann, R. Hey, A. Tahraoui, H. Richter, H.-W. Hübers, and H.T. Grahn

63 Author F. Gericke , T. Flissikowski , F. Katmis , W. Braun , H.T. Grahn
Title

Rate equation model for the time dependence of the reflectance of a Ge2Te2Sb5 film during optical switching processes

Source J. Appl. Phys. , 113 , 183507 ( 2013 )
Download: PDF | 2397 Cite : Bibtex RIS
F. Gericke, T. Flissikowski, F. Katmis, W. Braun, and H.T. Grahn

64 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

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

66 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

67 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

68 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

69 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

70 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