Prof. Dr. Holger T. Grahn

Frequency modulation spectroscopy with a THz quantum-cascade laser

@article{ author = { R. Eichholz and H. Richter and M. Wienold and L. Schrottke and R. Hey and H. T. Grahn and H.-W. Hübers }, title = { Frequency modulation spectroscopy with a THz quantum-cascade laser }, journal = { Optics Express }, volume = { 21 }, year = { 2013 }, pages = { 32199 } }

TY - JOUR AU - R. Eichholz AU - H. Richter AU - M. Wienold AU - L. Schrottke AU - R. Hey AU - H. T. Grahn AU - H.-W. Hübers TI - Frequency modulation spectroscopy with a THz quantum-cascade laser JF - Optics Express JA - Opt. Express J1 - VL - 21 SP - 32199 PY - 2013/12/20

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

@article{ author = { B. Wilsch and U. Jahn and B. Jenichen and J. Lähnemann and H.T. Grahn and H. Wang and H. Yang }, title = { Spatially resolved investigation of strain and composition variations in (In,Ga)N/GaN epilayers }, journal = { Applied Physics Letters }, volume = { 102 }, year = { 2013 }, pages = { 052109 } }

TY - JOUR AU - B. Wilsch AU - U. Jahn AU - B. Jenichen AU - J. Lähnemann AU - H.T. Grahn AU - H. Wang AU - H. Yang TI - Spatially resolved investigation of strain and composition variations in (In,Ga)N/GaN epilayers JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 102 SP - 052109 PY - 2013/02/05

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

@article{ author = { L. Schrottke and M. Wienold and R. Sharma and X. Lü and K. Biermann and R. Hey and A. Tahraoui and H. Richter and H.-W. Hübers and H.T. Grahn }, title = { Quantum-cascade lasers as local oscillators for heterodyne spectrometers in the spectral range around 4.745 THz }, journal = { Semiconductor Science and Technology }, volume = { 28 }, year = { 2013 }, pages = { 035011 } }

TY - JOUR AU - L. Schrottke AU - M. Wienold AU - R. Sharma AU - X. Lü AU - K. Biermann AU - R. Hey AU - A. Tahraoui AU - H. Richter AU - H.-W. Hübers AU - H.T. Grahn TI - Quantum-cascade lasers as local oscillators for heterodyne spectrometers in the spectral range around 4.745 THz JF - Semiconductor Science and Technology JA - Semicond. Sci. Technol. J1 - SST VL - 28 SP - 035011 PY - 2013/01/01

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

@article{ author = { F. Gericke and T. Flissikowski and F. Katmis and W. Braun and H.T. Grahn }, title = { Rate equation model for the time dependence of the reflectance of a Ge₂Te₂Sb₅ film during optical switching processes }, journal = { Journal of Applied Physics }, volume = { 113 }, year = { 2013 }, pages = { 183507 } }

TY - JOUR AU - F. Gericke AU - T. Flissikowski AU - F. Katmis AU - W. Braun AU - H.T. Grahn TI - Rate equation model for the time dependence of the reflectance of a Ge₂Te₂Sb₅ film during optical switching processes JF - Journal of Applied Physics JA - J. Appl. Phys. J1 - JAP VL - 113 SP - 183507 PY - 2013/01/01

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

@article{ author = { X. Lü and M. Wienold and L. Schrottke and K. Biermann and H.T. Grahn }, title = { Mid-infrared-pumped, electrically driven terahertz quantum laser: enhanced pumping efficiency and prevention of electric-field domains }, journal = { Journal of Applied Physics }, volume = { 113 }, year = { 2013 }, pages = { 033103 } }

TY - JOUR AU - X. Lü AU - M. Wienold AU - L. Schrottke AU - K. Biermann AU - H.T. Grahn TI - Mid-infrared-pumped, electrically driven terahertz quantum laser: enhanced pumping efficiency and prevention of electric-field domains JF - Journal of Applied Physics JA - J. Appl. Phys. J1 - JAP VL - 113 SP - 033103 PY - 2013/01/01

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

@article{ author = { R. Sharma and L. Schrottke and M. Wienold and K. Biermann and A. Tahraoui and H.T. Grahn }, title = { Influence of post-growth rapid thermal annealing on the transport and lasing characteristics of terahertz quantum-cascade lasers }, journal = { Journal of Physics D: Applied Physics }, volume = { 46 }, year = { 2013 }, pages = { 305107 } }

TY - JOUR AU - R. Sharma AU - L. Schrottke AU - M. Wienold AU - K. Biermann AU - A. Tahraoui AU - H.T. Grahn TI - Influence of post-growth rapid thermal annealing on the transport and lasing characteristics of terahertz quantum-cascade lasers JF - Journal of Physics D: Applied Physics JA - J. Phys. D: Appl. Phys. J1 - JPD VL - 46 SP - 305107 PY - 2013/01/01

Auger recombination as the dominant nonradiative recombination channel in InN

@article{ author = { Y. J. Cho and X. Lue and M. Wienold and M. Ramsteiner and H.T. Grahn and O. Brandt }, title = { Auger recombination as the dominant nonradiative recombination channel in InN }, journal = { Physical Review B: Solid State }, volume = { 87 }, year = { 2013 }, pages = { 155203 } }

TY - JOUR AU - Y. J. Cho AU - X. Lue AU - M. Wienold AU - M. Ramsteiner AU - H.T. Grahn AU - O. Brandt TI - Auger recombination as the dominant nonradiative recombination channel in InN JF - Physical Review B: Solid State JA - Phys. Rev. B J1 - VL - 87 SP - 155203 PY - 2013/01/01

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

@article{ author = { O. Brandt and P. Misra and T. Flissikowski and H.T. Grahn }, title = { Excitation polarization anisotropy of the spontaneous emission from an M-plane GaN film: Competition between hole relaxation and exciton recombination }, journal = { Physical Review B: Solid State }, volume = { 87 }, year = { 2013 }, pages = { 165308 } }

TY - JOUR AU - O. Brandt AU - P. Misra AU - T. Flissikowski AU - H.T. Grahn TI - Excitation polarization anisotropy of the spontaneous emission from an M-plane GaN film: Competition between hole relaxation and exciton recombination JF - Physical Review B: Solid State JA - Phys. Rev. B J1 - VL - 87 SP - 165308 PY - 2013/01/01

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

@article{ author = { N. Rothbart and H. Richter and M. Wienold and L. Schrottke and H.T. Grahn and H.-W. Hübers }, title = { Fast 2D and 3D terahertz imaging with a quantum-cascade laser and a scanning mirror }, journal = { IEEE Transactions on Terahertz Science and Technology }, volume = { 3 }, year = { 2013 }, pages = { 617 } }

TY - JOUR AU - N. Rothbart AU - H. Richter AU - M. Wienold AU - L. Schrottke AU - H.T. Grahn AU - H.-W. Hübers TI - Fast 2D and 3D terahertz imaging with a quantum-cascade laser and a scanning mirror JF - IEEE Transactions on Terahertz Science and Technology JA - IEEE Trans. Terahertz Sci. Technol. J1 - VL - 3 SP - 617 PY - 2013/01/01

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

@article{ author = { O. Krüger and S. Kreutzmann and D. Prasai and M. Wienold and R. Sharma and W. Pittroff and L. Weixelbaum and W. John and K. Biermann and L. Schrottke and F. Schnieder and G. Erbert and H.T. Grahn and G. Tränkle }, title = { Epitaxial-side mounting of terahertz quantum-cascade lasers for improved heat management }, journal = { IEEE Photonics Technology Letters }, volume = { 25 }, year = { 2013 }, pages = { 1570 } }

TY - JOUR AU - O. Krüger AU - S. Kreutzmann AU - D. Prasai AU - M. Wienold AU - R. Sharma AU - W. Pittroff AU - L. Weixelbaum AU - W. John AU - K. Biermann AU - L. Schrottke AU - F. Schnieder AU - G. Erbert AU - H.T. Grahn AU - G. Tränkle TI - Epitaxial-side mounting of terahertz quantum-cascade lasers for improved heat management JF - IEEE Photonics Technology Letters JA - IEEE Photon. Technol. Lett. J1 - VL - 25 SP - 1570 PY - 2013/01/01