Prof. Dr. Holger T. Grahn

Correlation between frequency and location on the wafer for terahertz quantum-cascade lasers

@article{ author = { X. Lü and B. Röben and L. Schrottke and K. Biermann and H. T. Grahn }, title = { Correlation between frequency and location on the wafer for terahertz quantum-cascade lasers }, journal = { Semiconductor Science and Technology }, volume = { 36 }, year = { 2021 }, pages = { 035012 } }

TY - JOUR AU - X. Lü AU - B. Röben AU - L. Schrottke AU - K. Biermann AU - H. T. Grahn TI - Correlation between frequency and location on the wafer for terahertz quantum-cascade lasers JF - Semiconductor Science and Technology JA - Semicond. Sci. Technol. J1 - SST VL - 36 SP - 035012 PY - 2021/02/05

In-situ control of molecular beam epitaxial growth by spectral reflectivity analysis

@article{ author = { K. Biermann and Paul L. J. Helgers and A. Crespo-Poveda and A. S. Kuznetsov and A. Tahraoui and B. Röben and X. Lü and L. Schrottke and P. V. Santos and H. T. Grahn }, title = { In-situ control of molecular beam epitaxial growth by spectral reflectivity analysis }, journal = { Journal of Crystal Growth }, volume = { 557 }, year = { 2021 }, pages = { 125993 } }

TY - JOUR AU - K. Biermann AU - Paul L. J. Helgers AU - A. Crespo-Poveda AU - A. S. Kuznetsov AU - A. Tahraoui AU - B. Röben AU - X. Lü AU - L. Schrottke AU - P. V. Santos AU - H. T. Grahn TI - In-situ control of molecular beam epitaxial growth by spectral reflectivity analysis JF - Journal of Crystal Growth JA - J. Cryst. Growth J1 - JGC VL - 557 SP - 125993 PY - 2021/01/07

Electronic and magnetic properties of alpha-FeGe2 films embedded in vertical spin valve devices

@article{ author = { D. Czubak and S. Gaucher and L. Oppermann and J. Herfort and K. Zollner and J. Fabian and H. T. Grahn and M. Ramsteiner }, title = { Electronic and magnetic properties of alpha-FeGe2 films embedded in vertical spin valve devices }, journal = { Physical Review Materials }, volume = { 4 }, year = { 2020 }, pages = { 104415 } }

TY - JOUR AU - D. Czubak AU - S. Gaucher AU - L. Oppermann AU - J. Herfort AU - K. Zollner AU - J. Fabian AU - H. T. Grahn AU - M. Ramsteiner TI - Electronic and magnetic properties of alpha-FeGe2 films embedded in vertical spin valve devices JF - Physical Review Materials JA - Phys. Rev. Mater. J1 - VL - 4 SP - 104415 PY - 2020/10/26

Effective group dispersion of terahertz quantum-cascade lasers

@article{ author = { B. Röben and X. Lü and K. Biermann and L. Schrottke and H. T. Grahn }, title = { Effective group dispersion of terahertz quantum-cascade lasers }, journal = { Journal of Physics D: Applied Physics }, volume = { 54 }, year = { 2020 }, pages = { 025110 } }

TY - JOUR AU - B. Röben AU - X. Lü AU - K. Biermann AU - L. Schrottke AU - H. T. Grahn TI - Effective group dispersion of terahertz quantum-cascade lasers JF - Journal of Physics D: Applied Physics JA - J. Phys. D: Appl. Phys. J1 - JPD VL - 54 SP - 025110 PY - 2020/10/22

Terahertz spectroscopy using quantum-cascade lasers

@article{ author = { H.-W. Hübers and H. Richter and M. Wienold and X. Lü and L. Schrottke and H. T. Grahn }, title = { Terahertz spectroscopy using quantum-cascade lasers }, journal = { Photoniques }, volume = { 101 }, year = { 2020 }, pages = { 27 } }

TY - JOUR AU - H.-W. Hübers AU - H. Richter AU - M. Wienold AU - X. Lü AU - L. Schrottke AU - H. T. Grahn TI - Terahertz spectroscopy using quantum-cascade lasers JF - Photoniques JA - Photoniques J1 - VL - 101 SP - 27 PY - 2020/04/29

High-performance GaAs/AlAs terahertz quantum-cascade lasers for spectroscopic applications

@article{ author = { L. Schrottke and X. Lü and B. Röben and K. Biermann and T. Hagelschuer and M. Wienold and H.-W. Hübers and M. Hannemann and J.-P. H. van Helden and J. Röpcke and H. T. Grahn }, title = { High-performance GaAs/AlAs terahertz quantum-cascade lasers for spectroscopic applications }, journal = { IEEE Transactions on Terahertz Science and Technology }, volume = { 10 }, year = { 2019 }, pages = { 133 } }

TY - JOUR AU - L. Schrottke AU - X. Lü AU - B. Röben AU - K. Biermann AU - T. Hagelschuer AU - M. Wienold AU - H.-W. Hübers AU - M. Hannemann AU - J.-P. H. van Helden AU - J. Röpcke AU - H. T. Grahn TI - High-performance GaAs/AlAs terahertz quantum-cascade lasers for spectroscopic applications JF - IEEE Transactions on Terahertz Science and Technology JA - IEEE Trans. Terahertz Sci. Technol. J1 - VL - 10 SP - 133 PY - 2019/12/06

Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation

@article{ author = { T. Alam and M. Wienold and X. Lü and K. Biermann and L. Schrottke and H. T. Grahn and H.-W. Hübers }, title = { Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation }, journal = { Optics Express }, volume = { 27 }, year = { 2019 }, pages = { 36846 } }

TY - JOUR AU - T. Alam AU - M. Wienold AU - X. Lü AU - K. Biermann AU - L. Schrottke AU - H. T. Grahn AU - H.-W. Hübers TI - Frequency and power stabilization of a terahertz quantum-cascade laser using near-infrared optical excitation JF - Optics Express JA - Opt. Express J1 - VL - 27 SP - 36846 PY - 2019/12/04

A compact 4.75-THz source based on a quantum-cascade laser with a back-facet mirror

@article{ author = { T. Hagelschuer and H. Richter and M. Wienold and X. Lü and B. Röben and L. Schrottke and K. Biermann and H. T. Grahn and H.-W. Hübers }, title = { A compact 4.75-THz source based on a quantum-cascade laser with a back-facet mirror }, journal = { IEEE Transactions on Terahertz Science and Technology }, volume = { 9 }, year = { 2019 }, pages = { 606 } }

TY - JOUR AU - T. Hagelschuer AU - H. Richter AU - M. Wienold AU - X. Lü AU - B. Röben AU - L. Schrottke AU - K. Biermann AU - H. T. Grahn AU - H.-W. Hübers TI - A compact 4.75-THz source based on a quantum-cascade laser with a back-facet mirror JF - IEEE Transactions on Terahertz Science and Technology JA - IEEE Trans. Terahertz Sci. Technol. J1 - VL - 9 SP - 606 PY - 2019/08/14

Absence of quantum-confined Stark effect in GaN quantum disks embedded in (Al,Ga)N nanowires grown by molecular beam epitaxy

@article{ author = { C. Sinito and P. Corfdir and C. Pfüller and G. Gao and J. Bartolomé and S. Kölling and A. Rodil Doblado and U. Jahn and J. Lähnemann and T. Auzelle and J. K. Zettler and T. Flissikowski and P. Koenraad and H. T. Grahn and L. Geelhaar and S. Fernández-Garrido and O. Brandt }, title = { Absence of quantum-confined Stark effect in GaN quantum disks embedded in (Al,Ga)N nanowires grown by molecular beam epitaxy }, journal = { Nano Letters }, volume = { 19 }, year = { 2019 }, pages = { 5938 } }

TY - JOUR AU - C. Sinito AU - P. Corfdir AU - C. Pfüller AU - G. Gao AU - J. Bartolomé AU - S. Kölling AU - A. Rodil Doblado AU - U. Jahn AU - J. Lähnemann AU - T. Auzelle AU - J. K. Zettler AU - T. Flissikowski AU - P. Koenraad AU - H. T. Grahn AU - L. Geelhaar AU - S. Fernández-Garrido AU - O. Brandt TI - Absence of quantum-confined Stark effect in GaN quantum disks embedded in (Al,Ga)N nanowires grown by molecular beam epitaxy JF - Nano Letters JA - Nano Lett. J1 - VL - 19 SP - 5938 PY - 2019/08/06

Terahertz quantum-cascade lasers for high-resolution spectroscopy of sharp absorption lines

@article{ author = { B. Röben and X. Lü and K. Biermann and L. Schrottke and H. T. Grahn }, title = { Terahertz quantum-cascade lasers for high-resolution spectroscopy of sharp absorption lines }, journal = { Journal of Applied Physics }, volume = { 125 }, year = { 2019 }, pages = { 151613 } }

TY - JOUR AU - B. Röben AU - X. Lü AU - K. Biermann AU - L. Schrottke AU - H. T. Grahn TI - Terahertz quantum-cascade lasers for high-resolution spectroscopy of sharp absorption lines JF - Journal of Applied Physics JA - J. Appl. Phys. J1 - JAP VL - 125 SP - 151613 PY - 2019/04/05