Prof. Dr. Holger T. Grahn

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

@article{ author = { T. Hagelschuer and M. Wienold and H. Richter and L. Schrottke and H. T. Grahn and H.-W. Hübers }, title = { Real-time gas sensing based on optical feedback in a terahertz quantum-cascade laser }, journal = { Optics Express }, volume = { 25 }, year = { 2017 }, pages = { 30203 } }

TY - JOUR AU - T. Hagelschuer AU - M. Wienold AU - H. Richter AU - L. Schrottke AU - H. T. Grahn AU - H.-W. Hübers TI - Real-time gas sensing based on optical feedback in a terahertz quantum-cascade laser JF - Optics Express JA - Opt. Express J1 - VL - 25 SP - 30203 PY - 2017/11/17

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

@article{ author = { F. Feix and T. Flissikowski and K. K. Sabelfeld and V. M. Kaganer and M. Wölz and L. Geelhaar and H. T. Grahn and 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 }, journal = { Physical Review Applied }, volume = { 8 }, year = { 2017 }, pages = { 014032 } }

TY - JOUR AU - F. Feix AU - T. Flissikowski AU - K. K. Sabelfeld AU - V. M. Kaganer AU - M. Wölz AU - L. Geelhaar AU - H. T. Grahn AU - O. Brandt TI - 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 JF - Physical Review Applied JA - Phys. Rev. Appl. J1 - VL - 8 SP - 014032 PY - 2017/07/27

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

@article{ author = { A. Guzman and R. San-Roman and R. Gargallo-Caballero and H. T. Grahn }, title = { Laterally biased quantum-well infrared photodetectors operating at room temperature with low dark currents }, journal = { IEEE Journal of Selected Topics in Quantum Electronics }, volume = { 24 }, year = { 2017 }, pages = { 1900206 } }

TY - JOUR AU - A. Guzman AU - R. San-Roman AU - R. Gargallo-Caballero AU - H. T. Grahn TI - Laterally biased quantum-well infrared photodetectors operating at room temperature with low dark currents JF - IEEE Journal of Selected Topics in Quantum Electronics JA - IEEE J. Sel. Topics Quantum Electron. J1 - VL - 24 SP - 1900206 PY - 2017/07/21

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

@article{ author = { B. Röben and X. Lü and M. Hempel and K. Biermann and L. Schrottke and H. T. Grahn }, title = { Terahertz quantum-cascade lasers as high-power and wideband, gapless sources for spectroscopy }, journal = { Optics Express }, volume = { 25 }, year = { 2017 }, pages = { 16282 } }

TY - JOUR AU - B. Röben AU - X. Lü AU - M. Hempel AU - K. Biermann AU - L. Schrottke AU - H. T. Grahn TI - Terahertz quantum-cascade lasers as high-power and wideband, gapless sources for spectroscopy JF - Optics Express JA - Opt. Express J1 - VL - 25 SP - 16282 PY - 2017/06/29

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

@article{ author = { M. Hempel and B. Röben and M. Niehle and L. Schrottke and A. Trampert and H. T. Grahn }, title = { Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination }, journal = { AIP Advances }, volume = { 7 }, year = { 2017 }, pages = { 055201 } }

TY - JOUR AU - M. Hempel AU - B. Röben AU - M. Niehle AU - L. Schrottke AU - A. Trampert AU - H. T. Grahn TI - Continuous tuning of two-section, single-mode terahertz quantum-cascade lasers by fiber-coupled, near-infrared illumination JF - AIP Advances JA - AIP Adv. J1 - VL - 7 SP - 055201 PY - 2017/05/04

Laterally biased structures for room temperature operation of quantumwell infrared photodetectors

@article{ author = { A. Guzman and R. Gargallo-Caballero and X. Lü and H. T. Grahn }, title = { Laterally biased structures for room temperature operation of quantumwell infrared photodetectors }, journal = { Journal of Crystal Growth }, volume = { 477 }, year = { 2017 }, pages = { 272 } }

TY - JOUR AU - A. Guzman AU - R. Gargallo-Caballero AU - X. Lü AU - H. T. Grahn TI - Laterally biased structures for room temperature operation of quantumwell infrared photodetectors JF - Journal of Crystal Growth JA - J. Cryst. Growth J1 - JGC VL - 477 SP - 272 PY - 2017/04/19

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

@article{ author = { H.-W. Hübers and H. Richter and R. Eichholz and M. Wienold and K. Biermann and L. Schrottke and H. T. Grahn }, title = { Heterodyne Spectroscopy of Frequency Instabilities in Terahertz Quantum-Cascade Lasers Induced by Optical Feedback }, journal = { IEEE Journal of Selected Topics in Quantum Electronics }, volume = { 23 }, year = { 2017 }, pages = { 1800306 } }

TY - JOUR AU - H.-W. Hübers AU - H. Richter AU - R. Eichholz AU - M. Wienold AU - K. Biermann AU - L. Schrottke AU - H. T. Grahn TI - Heterodyne Spectroscopy of Frequency Instabilities in Terahertz Quantum-Cascade Lasers Induced by Optical Feedback JF - IEEE Journal of Selected Topics in Quantum Electronics JA - IEEE J. Sel. Topics Quantum Electron. J1 - VL - 23 SP - 1800306 PY - 2017/03/17

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

@article{ author = { Z. Z. Yin and H. Song and Y. H. Zhang and M. Ruiz-Garcia and M. Carretero and L. L. Bonilla and K. Biermann and H. T. Grahn }, title = { Noise-enhanced chaos in a weakly coupled GaAs/(Al,Ga)As superlattice }, journal = { Physical Review E: Statistical, Nonlinear, and Soft Matter Physics }, volume = { 95 }, year = { 2017 }, pages = { 012218 } }

TY - JOUR AU - Z. Z. Yin AU - H. Song AU - Y. H. Zhang AU - M. Ruiz-Garcia AU - M. Carretero AU - L. L. Bonilla AU - K. Biermann AU - H. T. Grahn TI - Noise-enhanced chaos in a weakly coupled GaAs/(Al,Ga)As superlattice JF - Physical Review E: Statistical, Nonlinear, and Soft Matter Physics JA - Phys. Rev. E J1 - PRE VL - 95 SP - 012218 PY - 2017/01/30

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

@article{ author = { C. Hauswald and I. Giuntoni and T. Flissikowski and T. Gotschke and R. Calarco and H. T. Grahn and L. Geelhaar and O. Brandt }, title = { Luminous efficiency of ordered arrays of GaN nanowires with sub-wavelength diameters }, journal = { ACS Photonics }, volume = { 4 }, year = { 2017 }, pages = { 52 } }

TY - JOUR AU - C. Hauswald AU - I. Giuntoni AU - T. Flissikowski AU - T. Gotschke AU - R. Calarco AU - H. T. Grahn AU - L. Geelhaar AU - O. Brandt TI - Luminous efficiency of ordered arrays of GaN nanowires with sub-wavelength diameters JF - ACS Photonics JA - ACS Photonics J1 - VL - 4 SP - 52 PY - 2017/01/19

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

@article{ author = { T. Hagelschuer and M. Wienold and H. Richter and L. Schrottke and K. Biermann and H. T. Grahn and H.-W. Hübers }, title = { Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser }, journal = { Applied Physics Letters }, volume = { 109 }, year = { 2016 }, pages = { 191101 } }

TY - JOUR AU - T. Hagelschuer AU - M. Wienold AU - H. Richter AU - L. Schrottke AU - K. Biermann AU - H. T. Grahn AU - H.-W. Hübers TI - Terahertz gas spectroscopy through self-mixing in a quantum-cascade laser JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 109 SP - 191101 PY - 2016/11/07