Determination of the interface grading parameter for terahertz quantum-cascade laser structures based on transmission electron microscopy

@article{ author = { X. Lü and E. Luna and L. Schrottke and K. Biermann and H. T. Grahn }, title = { Determination of the interface grading parameter for terahertz quantum-cascade laser structures based on transmission electron microscopy }, journal = { Applied Physics Letters }, volume = { 113 }, year = { 2018 }, pages = { 172101 } }

TY - JOUR AU - X. Lü AU - E. Luna AU - L. Schrottke AU - K. Biermann AU - H. T. Grahn TI - Determination of the interface grading parameter for terahertz quantum-cascade laser structures based on transmission electron microscopy JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 113 SP - 172101 PY - 2018/10/22

Intrinsic frequency tuning of terahertz quantum-cascade lasers

@article{ author = { L. Schrottke and X. Lü and B. Röben and K. Biermann and M. Wienold and H. Richter and H.-W. Hübers and H. T. Grahn }, title = { Intrinsic frequency tuning of terahertz quantum-cascade lasers }, journal = { Journal of Applied Physics }, volume = { 123 }, year = { 2018 }, pages = { 213102 } }

TY - JOUR AU - L. Schrottke AU - X. Lü AU - B. Röben AU - K. Biermann AU - M. Wienold AU - H. Richter AU - H.-W. Hübers AU - H. T. Grahn TI - Intrinsic frequency tuning of terahertz quantum-cascade lasers JF - Journal of Applied Physics JA - J. Appl. Phys. J1 - JAP VL - 123 SP - 213102 PY - 2018/05/31

Doppler-free spectroscopy with a terahertz quantum-cascade laser

@article{ author = { M. Wienold and T. Alam and L. Schrottke and H. T. Grahn and H.-W. Hübers }, title = { Doppler-free spectroscopy with a terahertz quantum-cascade laser }, journal = { Optics Express }, volume = { 26 }, year = { 2018 }, pages = { 6692 } }

TY - JOUR AU - M. Wienold AU - T. Alam AU - L. Schrottke AU - H. T. Grahn AU - H.-W. Hübers TI - Doppler-free spectroscopy with a terahertz quantum-cascade laser JF - Optics Express JA - Opt. Express J1 - VL - 26 SP - 6692 PY - 2018/03/05

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

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

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

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

Efficient numerical procedure for the determination of the wave function-independent terms in longitudinal optical phonon scattering rates formulated in the Fourier domain

@article{ author = { X. Lü and L. Schrottke and H. T. Grahn }, title = { Efficient numerical procedure for the determination of the wave function-independent terms in longitudinal optical phonon scattering rates formulated in the Fourier domain }, journal = { Journal of Computational Electronics }, volume = { 15 }, year = { 2016 }, pages = { 1505 } }

TY - JOUR AU - X. Lü AU - L. Schrottke AU - H. T. Grahn TI - Efficient numerical procedure for the determination of the wave function-independent terms in longitudinal optical phonon scattering rates formulated in the Fourier domain JF - Journal of Computational Electronics JA - J. Comput. Electron. J1 - VL - 15 SP - 1505 PY - 2016/09/16

Real-time terahertz imaging through self-mixing in a quantum-cascade laser

@article{ author = { M. Wienold and T. Hagelschuer and N. Rothbart and L. Schrottke and K. Biermann and H. T. Grahn and H.-W. Hübers }, title = { Real-time terahertz imaging through self-mixing in a quantum-cascade laser }, journal = { Applied Physics Letters }, volume = { 109 }, year = { 2016 }, pages = { 011102 } }

TY - JOUR AU - M. Wienold AU - T. Hagelschuer AU - N. Rothbart AU - L. Schrottke AU - K. Biermann AU - H. T. Grahn AU - H.-W. Hübers TI - Real-time terahertz imaging through self-mixing in a quantum-cascade laser JF - Applied Physics Letters JA - Appl. Phys. Lett. J1 - APL VL - 109 SP - 011102 PY - 2016/07/07