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: Ferromagnet/ semiconductor hybrid structures , Intersubband emitters , III-V nanowires for optoelectronics

 

 

21 Author T. Hagelschuer , M. Wienold , H. Richter , L. Schrottke , H. T. Grahn , H.-W. Hübers
Title

Real-time gas sensing based on optical feedback in a terahertz quantum-cascade laser

Source Opt. Express , 25 , 30203 ( 2017 )
DOI : 10.1364/OE.25.030203 | Download: PDF | 2998 Cite : Bibtex RIS
T. Hagelschuer, M. Wienold, H. Richter, L. Schrottke, H. T. Grahn, and H.-W. Hübers

22 Author F. Feix , T. Flissikowski , K. K. Sabelfeld , V. M. Kaganer , M. Wölz , L. Geelhaar , H. T. Grahn , O. Brandt
Title

Ga-Polar (In,Ga)N/GaN Quantum Wells Versus N-Polar (In,Ga)N Quantum Disks in GaN Nanowires: A Comparative Analysis of Carrier Recombination, Diffusion, and Radiative Efficiency

Source Phys. Rev. Appl. , 8 , 014032 ( 2017 )
DOI : 10.1103/PhysRevApplied.8.014032 | Download arXiv: 1703.06715 | 2905 Cite : Bibtex RIS
F. Feix, T. Flissikowski, K. K. Sabelfeld, V. M. Kaganer, M. Wölz, L. Geelhaar, H. T. Grahn, and O. Brandt

23 Author A. Guzman , R. San-Roman , R. Gargallo-Caballero , H. T. Grahn
Title

Laterally biased quantum-well infrared photodetectors operating at room temperature with low dark currents

Source IEEE J. Sel. Topics Quantum Electron. , 24 , 1900206 ( 2017 )
DOI : 10.1109/JSTQE.2017.2703307 | 2953 Cite : Bibtex RIS
A. Guzman, R. San-Roman, R. Gargallo-Caballero, and H. T. Grahn

24 Author B. Röben , X. Lü , M. Hempel , K. Biermann , L. Schrottke , H. T. Grahn
Title

Terahertz quantum-cascade lasers as high-power and wideband, gapless sources for spectroscopy

Source Opt. Express , 25 , 16282 ( 2017 )
DOI : 10.1364/OE.25.016282 | Download: PDF | 2916 Cite : Bibtex RIS
B. Röben, X. Lü, M. Hempel, K. Biermann, L. Schrottke, and H. T. Grahn

25 Author M. Hempel , B. Röben , M. Niehle , L. Schrottke , A. Trampert , H. T. Grahn
Title

Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination

Source AIP Adv. , 7 , 055201 ( 2017 )
DOI : 10.1063/1.4983030 | Download: PDF | 2902 Cite : Bibtex RIS
M. Hempel, B. Röben, M. Niehle, L. Schrottke, A. Trampert, and H. T. Grahn

26 Author A. Guzman , R. Gargallo-Caballero , X. Lü , H. T. Grahn
Title

Laterally biased structures for room temperature operation of quantumwell infrared photodetectors

Source J. Cryst. Growth , 477 , 272 ( 2017 )
DOI : 10.1016/j.jcrysgro.2017.04.023 | 2993 Cite : Bibtex RIS
A. Guzman, R. Gargallo-Caballero, X. Lü, and H. T. Grahn

27 Author H.-W. Hübers , H. Richter , R. Eichholz , M. Wienold , K. Biermann , L. Schrottke , H. T. Grahn
Title

Heterodyne Spectroscopy of Frequency Instabilities in Terahertz Quantum-Cascade Lasers Induced by Optical Feedback

Source IEEE J. Sel. Topics Quantum Electron. , 23 , 1800306 ( 2017 )
DOI : 10.1109/JSTQE.2017.2684078 | 2920 Cite : Bibtex RIS
H.-W. Hübers, H. Richter, R. Eichholz, M. Wienold, K. Biermann, L. Schrottke, and H. T. Grahn

28 Author Z. Z. Yin , H. Song , Y. H. Zhang , M. Ruiz-Garcia , M. Carretero , L. L. Bonilla , K. Biermann , H. T. Grahn
Title

Noise-enhanced chaos in a weakly coupled GaAs/(Al,Ga)As superlattice

Source Phys. Rev. E , 95 , 012218 ( 2017 )
DOI : 10.1103/PhysRevE.95.012218 | Download: PDF | 2896 Cite : Bibtex RIS
Z. Z. Yin, H. Song, Y. H. Zhang, M. Ruiz-Garcia, M. Carretero, L. L. Bonilla, K. Biermann, and H. T. Grahn

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

Luminous efficiency of ordered arrays of GaN nanowires with sub-wavelength diameters

Source ACS Photonics , 4 , 52 ( 2017 )
DOI : 10.1021/acsphotonics.6b00551 | 2823 Cite : Bibtex RIS
C. Hauswald, I. Giuntoni, T. Flissikowski, T. Gotschke, R. Calarco, H. T. Grahn, L. Geelhaar, and O. Brandt

30 Author T. Hagelschuer , M. Wienold , H. Richter , L. Schrottke , K. Biermann , H. T. Grahn , H.-W. Hübers
Title

Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser

Source Appl. Phys. Lett. , 109 , 191101 ( 2016 )
DOI : 10.1063/1.4967435 | Download: PDF | 2882 Cite : Bibtex RIS
T. Hagelschuer, M. Wienold, H. Richter, L. Schrottke, K. Biermann, H. T. Grahn, and H.-W. Hübers