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  • Stephan W Koch
2019

10 micron filaments in the atmosphere: Modeling perspective

Panagiotopoulos, P., Rosenow, P., Tochitsky, S., Koch, S. W., Wright, E. W., Kolesik, M. & Moloney, J. V., Aug 2019, 2019 IEEE Research and Applications of Photonics in Defense Conference, RAPID 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 8864315. (2019 IEEE Research and Applications of Photonics in Defense Conference, RAPID 2019 - Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ab-initio calculation of band alignments for opto-electronic simulations

Oelerich, J. O., Weseloh, M. J., Volz, K. & Koch, S. W., May 1 2019, In : AIP Advances. 9, 5, 055328.

Research output: Contribution to journalArticle

Open Access

Carrier dynamics in TMDCs for optical applications

Hader, J., Moloney, J. V., Meckbach, L., Stroucken, T. & Koch, S. W., Jan 1 2019, 2D Photonic Materials and Devices II. Deng, H., Torres, C. M. & Majumdar, A. (eds.). SPIE, 109200I. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10920).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Complex dielectric function of GaA s1-x B ix as a function of Bi content

Mahtab, M., Synowicki, R., Bahrami-Yekta, V., Bannow, L. C., Koch, S. W., Lewis, R. B. & Tiedje, T., May 3 2019, In : Physical Review Materials. 3, 5, 054601.

Research output: Contribution to journalArticle

1 Scopus citations

Control of the filament dynamics of 10 µm pulses via designer pulse trains

Panagiotopoulos, P., Kolesik, M., Koch, S. W., Wright, E. M., Tochitsky, S. & Moloney, J. V., Jan 1 2019, In : Journal of the Optical Society of America B: Optical Physics. 36, 10, p. G33-G39

Research output: Contribution to journalArticle

2 Scopus citations

Control of the nonlinear response of bulk GaAs induced by long-wavelength infrared pulses

Matteo, D., Pigeon, J., Tochitsky, S. Y. A., Huttner, U., Kira, M., Koch, S. W., Moloney, J. V. & Joshi, C., Oct 14 2019, In : Optics Express. 27, 21, p. 30462-30472 11 p.

Research output: Contribution to journalArticle

1 Scopus citations

Electron-hole collisions in an atomically thin semiconductor

Langer, F., Schmid, C. P., Schlauderer, S., Nagler, P., Schüller, C., Korn, T., Gmitra, M., Fabian, J., Hawkins, P. G., Huttner, U., Steiner, J. T., Koch, S. W., Kira, M. & Huber, R., May 24 2019, In : Journal of Physics: Conference Series. 1220, 1, 012001.

Research output: Contribution to journalConference article

Open Access

Filamentation of long-wave infrared pulses in the atmosphere [Invited]

Tochitsky, S., Welch, E., Panagiotopoulos, P., Polyanskiy, M., Pogorelsky, I., Kolesik, M., Koch, S. W., Moloney, J. V. & Joshi, C., Jan 1 2019, In : Journal of the Optical Society of America B: Optical Physics. 36, 10, p. G40-G51

Research output: Contribution to journalReview article

Influence of microscopic many-body scattering on multi-wavelength VECSEL lasing

Kilen, I., Hader, J., Koch, S. W. & Moloney, J. V., Jan 1 2019, Vertical External Cavity Surface Emitting Lasers (VECSELs) IX. Keller, U. (ed.). SPIE, 109010E. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10901).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Laser beat-wave induced enhancement of the kerr nonlinearity in bulk GaAs at 10μm

Matteo, D., Pigeon, J., Tochitsky, S., Huttner, U., Kira, M., Koch, S. W., Moloney, J. V. & Joshi, C., Jan 1 2019, CLEO: QELS_Fundamental Science, CLEO_QELS 2019. OSA - The Optical Society, (Optics InfoBase Conference Papers; vol. Part F128-CLEO_QELS 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Laser Beat-Wave Induced Enhancement of the Kerr Nonlinearity in Bulk GaAs at 10μm

Matteo, D., Pigeon, J., Tochitsky, S., Huttner, U., Kira, M., Koch, S. W., Molonev, J. V. & Joshi, C., May 1 2019, 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 8750616. (2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lightwave driven valleytronic qubit flip

Borsch, M., Girodias, B. J., Steiner, J. T., Koch, S. W., Schmid, C. P., Schlauderer, S., Langer, F., Huber, R. & Kira, M., Jan 1 2019, CLEO: Applications and Technology, CLEO_AT 2019. OSA - The Optical Society, (Optics InfoBase Conference Papers; vol. Part F127-CLEO_AT 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lightwave Driven Valleytronic Qubit Flip

Borsch, M., Girodias, B. J., Steiner, J. T., Koch, S. W., Schmid, C. P., Schlauderer, S., Langer, F., Huber, R. & Kira, M., May 1 2019, 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 8749604. (2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lightwave valleytronics at multi-terahertz clock rates

Schmid, C. P., Langer, F., Schlauderer, S., Gmitra, M., Fabian, J., Nagler, P., Korn, T., Schuller, C., Hawkins, P. G., Steiner, J. T., Huttner, U., Koch, S. W., Kira, M. & Huber, R., Jun 2019, 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019. Institute of Electrical and Electronics Engineers Inc., 8872908. (2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Megafilament in air formed by self-guided terawatt long-wavelength infrared laser

Tochitsky, S., Welch, E., Polyanskiy, M., Pogorelsky, I., Panagiotopoulos, P., Kolesik, M., Wright, E. M., Koch, S. W., Moloney, J. V., Pigeon, J. & Joshi, C., Jan 1 2019, In : Nature Photonics. 13, 1, p. 41-46 6 p.

Research output: Contribution to journalArticle

19 Scopus citations
4 Scopus citations
1 Scopus citations

Non-equilibrium dynamics in the dual-wavelength operation of vertical external-cavity surface-emitting lasers

Kilen, I., Hader, J., Koch, S. W. & Moloney, J. V., Jan 1 2019, In : Optics Express. 27, 4, p. 5368-5382 15 p.

Research output: Contribution to journalArticle

Spin-Layer and Spin-Valley Locking in CVD-Grown AA′- and AB-Stacked Tungsten-Disulfide Bilayers

Schneider, L. M., Kuhnert, J., Schmitt, S., Heimbrodt, W., Huttner, U., Meckbach, L., Stroucken, T., Koch, S. W., Fu, S., Wang, X., Kang, K., Yang, E. H. & Rahimi-Iman, A., Jul 29 2019, In : Journal of Physical Chemistry C. 123, 35, p. 21813-21821 9 p.

Research output: Contribution to journalArticle

Terahertz lightwave electronics and valleytronics

Schmid, C. P., Peller, D., Langer, F., Schlauderer, S., Lange, C., Cocker, T., Repp, J., Reimann, J., Güdde, J., Höfer, U., Koch, S. W., Kira, M. & Huber, R., Jan 1 2019, Ultrafast Phenomena and Nanophotonics XXIII. Betz, M. & Elezzabi, A. Y. (eds.). SPIE, 1091606. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10916).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Two-stage filamentation of 10 μm pulses as a broadband infrared backlighter in the atmosphere

Panagiotopoulos, P., Kolesik, M., Tochitsky, S., Koch, S. W. & Moloney, J. V., Jan 1 2019, In : Optics letters. 44, 12, p. 3122-3125 4 p.

Research output: Contribution to journalArticle

3 Scopus citations

Valleytronics on the subcycle timescale

Schmid, C. P., Schlauderer, S., Langer, F., Gmitra, M., Fabian, J., Nagler, P., Schüller, C., Korn, T., Hawkins, P. G., Steiner, J. T., Huttner, U., Borsch, M., Girodias, B., Koch, S. W., Kira, M. & Huber, R., Jan 1 2019, CLEO: Applications and Technology, CLEO_AT 2019. OSA - The Optical Society, (Optics InfoBase Conference Papers; vol. Part F127-CLEO_AT 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Valleytronics on the Subcycle Timescale

Schmid, C. P., Schlauderer, S., Langer, F., Gmitra, M., Fabian, J., Nagler, P., Schuller, C., Korn, T., Hawkins, P. G., Steiner, J. T., Huttner, U., Borsch, M., Girodias, B., Koch, S. W., Kira, M. & Huber, R., May 1 2019, 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 8750057. (2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2018

Ab initio calculations of the concentration dependent band gap reduction in dilute nitrides

Rosenow, P., Bannow, L. C., Fischer, E. W., Stolz, W., Volz, K., Koch, S. W. & Tonner, R., Feb 1 2018, In : Physical Review B. 97, 7, 075201.

Research output: Contribution to journalArticle

1 Scopus citations

Auger losses in dilute InAsBi

Hader, J., Badescu, S. C., Bannow, L. C., Moloney, J. V., Johnson, S. R. & Koch, S. W., May 7 2018, In : Applied Physics Letters. 112, 19, 192106.

Research output: Contribution to journalArticle

2 Scopus citations

Controlling electronic quantum motion on subcycle and atomic scales

Langer, F., Schlauderer, S., Schmid, C. P., Lange, C., Peller, D., Cocker, T. L., Repp, J., Steiner, J. T., Huttner, U., Hawkins, P. G., Koch, S. W., Kira, M. & Huber, R., Aug 6 2018, 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 8426573

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Controlling electronic quantum motion on subcycle and atomic scales

Langer, F., Schlauderer, S., Schmid, C. P., Lange, C., Peller, D., Cocker, T. L., Repp, J., Steiner, J. T., Huttner, U., Hawkins, P. G., Koch, S. W., Kira, M. & Huber, R., Jan 1 2018, CLEO: QELS_Fundamental Science, CLEO_QELS 2018. OSA - The Optical Society, Vol. Part F93-CLEO_QELS 2018.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dynamics of charge-transfer excitons in type-II semiconductor heterostructures

Stein, M., Lammers, C., Richter, P. H., Fuchs, C., Stolz, W., Koch, M., Vänskä, O., Weseloh, M. J., Kira, M. & Koch, S. W., Mar 26 2018, In : Physical Review B. 97, 12, 125306.

Research output: Contribution to journalArticle

6 Scopus citations

Evaluation of Dilute Bismide Materials for Mid-IR Applications

Hader, J., Badescu, S. C., Bannow, L. C., Moloney, J. V., Johnson, S. R. & Koch, S. W., Oct 30 2018, 26th International Semiconductor Laser Conference, ISLC 2018. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-September. p. 183-184 2 p. 8516227

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Exciton ionization by THz pulses in germanium

Stein, M., Lammers, C., Steiner, J. T., Richter, P. H., Koch, S. W., Koch, M. & Kira, M., Jul 9 2018, In : Journal of Physics B: Atomic, Molecular and Optical Physics. 51, 15, 154001.

Research output: Contribution to journalArticle

2 Scopus citations

Extended band anti-crossing model for dilute bismides

Hader, J., Badescu, S. C., Bannow, L. C., Moloney, J. V., Johnson, S. R. & Koch, S. W., Feb 5 2018, In : Applied Physics Letters. 112, 6, 062103.

Research output: Contribution to journalArticle

5 Scopus citations

Giant excitation induced bandgap renormalization in TMDC monolayers

Meckbach, L., Stroucken, T. & Koch, S. W., Feb 5 2018, In : Applied Physics Letters. 112, 6, 061104.

Research output: Contribution to journalArticle

12 Scopus citations

High-temperature operation of electrical injection type-II (GaIn)As/Ga(AsSb)/(GaIn)As "w"-quantum well lasers emitting at 1.3 μm

Fuchs, C., Brüggemann, A., Weseloh, M. J., Berger, C., Möller, C., Reinhard, S., Hader, J., Moloney, J. V., Bäumner, A., Koch, S. W. & Stolz, W., Dec 1 2018, In : Scientific Reports. 8, 1, 1422.

Research output: Contribution to journalArticle

3 Scopus citations

Influence of microscopic many-body scattering on the performance of ultrashort pulsed and CW multi-wavelength VECSEL lasing

Kilen, I., Moloney, J. V., Hader, J. & Koch, S. W., Jan 1 2018, Vertical External Cavity Surface Emitting Lasers (VECSELs) VIII. SPIE, Vol. 10515. 1051504

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Influence of the effective layer thickness on the ground-state and excitonic properties of transition-metal dichalcogenide systems

Meckbach, L., Stroucken, T. & Koch, S. W., Jan 18 2018, In : Physical Review B. 97, 3, 035425.

Research output: Contribution to journalArticle

21 Scopus citations

Interlayer excitons in transition-metal dichalcogenide heterostructures with type-II band alignment

Meckbach, L., Huttner, U., Bannow, L. C., Stroucken, T. & Koch, S. W., Aug 24 2018, In : Journal of Physics Condensed Matter. 30, 37, 374002.

Research output: Contribution to journalArticle

2 Scopus citations

Lightwave valleytronics in a monolayer of tungsten diselenide

Langer, F., Schmid, C. P., Schlauderer, S., Gmitra, M., Fabian, J., Nagler, P., Schüller, C., Korn, T., Hawkins, P. G., Steiner, J. T., Huttner, U., Koch, S. W., Kira, M. & Huber, R., May 3 2018, In : Nature. 557, 7703, p. 76-80 5 p.

Research output: Contribution to journalArticle

44 Scopus citations

Low-Threshold Operation of GaAs-Based (GaIn)As/Ga(AsSb)/(GaIn)As "w"-Quantum Well Lasers Emitting at 1.3 μm

Fuchs, C., Ludewig, P., Bruggemann, A., Perez, A. R., Weseloh, M. J., Reinhard, S., Hader, J., Moloney, J. V., Baumner, A., Koch, S. W. & Stolz, W., Oct 30 2018, 26th International Semiconductor Laser Conference, ISLC 2018. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-September. p. 221-222 2 p. 8516246

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microscopic Many-Body Model for Mode-Locked and Multi-Wavelength Operation in Vertical External-Cavity Surface-Emitting Lasers

Kilen, I., Koch, S. W., Hader, J. & Moloney, J. V., Oct 30 2018, 26th International Semiconductor Laser Conference, ISLC 2018. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-September. p. 201-202 2 p. 8516236

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Modeling and experimental realization of modelocked VECSEL producing high power sub-100 fs pulses

Laurain, A., Kilen, I., Hader, J., Ruiz Perez, A., Ludewig, P., Stolz, W., Addamane, S., Balakrishnan, G., Koch, S. W. & Moloney, J. V., Sep 17 2018, In : Applied Physics Letters. 113, 12, 121113.

Research output: Contribution to journalArticle

9 Scopus citations

Non-perturbative THz subcycle nonlinearities: From atomically strong fields to vacuum fields

Lange, C., Langer, F., Maag, T., Bayer, A., Mootz, M., Huttner, U., Kira, M., Koch, S. W., Bougeard, D. & Huber, R., Jan 1 2018, Optical Sensors, Sensors 2018. OSA - The Optical Society, Vol. Part F110-Sensors 2018.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Observation of interlayer excitons in MoSe2 single crystals

Horng, J., Stroucken, T., Zhang, L., Paik, E. Y., Deng, H. & Koch, S. W., Jun 7 2018, In : Physical Review B. 97, 24, 241404.

Research output: Contribution to journalArticle

10 Scopus citations

Simulation of LWIR TW ultrashort pulses over kilometer ranges in the atmosphere

Panagiotopoulos, P., Rosenow, P., Schuh, K., Kolesik, M., Wright, E. M., Koch, S. W. & Moloney, J. V., Jan 1 2018, Ultrafast Bandgap Photonics III. SPIE, Vol. 10638. 106381L

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Structure and cavity geometry optimization for ultrashort and high power pulse generation from a VECSEL

Laurain, A., Rockmore, R., Baker, C. W., Kilen, I., Addamane, S., Balakrishnan, G., Hader, J., Perez, A. R., Stolz, W., Koch, S. W. & Moloney, J. V., Jan 1 2018, Vertical External Cavity Surface Emitting Lasers (VECSELs) VIII. SPIE, Vol. 10515. 105150H

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Superradiant coupling effects in transition-metal dichalcogenides

Stevens, C. E., Stroucken, T., Stier, A. V., Paul, J., Zhang, H., Dey, P., Crooker, S. A., Koch, S. W. & Karaiskaj, D., Jun 20 2018, In : Optica. 5, 6, p. 749-755 7 p., 060749-07.

Research output: Contribution to journalArticle

3 Scopus citations

Terahertz Quasiparticle Acceleration: From Electron-Hole Collisions to Lightwave Valleytronics

Langer, F., Schmid, C. P., Schlauderer, S., Nagler, P., Schuller, C., Korn, T., Gmitra, M., Fabian, J., Hawkins, P. G., Steiner, J. T., Huttner, U., Koch, S. W., Kira, M. & Huber, R., Oct 25 2018, 2018 43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018. IEEE Computer Society, Vol. 2018-September. 8510268

Research output: Chapter in Book/Report/Conference proceedingConference contribution

VECSEL design for high peak power ultrashort mode-locked operation

Kilen, I., Koch, S. W., Hader, J. & Moloney, J. V., Jun 25 2018, In : Applied Physics Letters. 112, 26, 262105.

Research output: Contribution to journalArticle

4 Scopus citations

VECSEL Platform for Single/Dual Frequency CW Operation and Ultrashort Pulse Generation

Laurain, A., Rockmore, R., Kilen, I., Baker, C., Scheller, M. A., Addamane, S., Balakrishnan, G., Jones, R. J., Koch, S. W. & Moloney, J. V., Oct 30 2018, 26th International Semiconductor Laser Conference, ISLC 2018. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-September. p. 101-102 2 p. 8516186

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2017

An ab initio based approach to optical properties of semiconductor heterostructures

Bannow, L. C., Rosenow, P., Springer, P., Fischer, E. W., Hader, J., Moloney, J. V., Tonner, R. & Koch, S. W., Jun 7 2017, In : Modelling and Simulation in Materials Science and Engineering. 25, 6, 065001.

Research output: Contribution to journalArticle

3 Scopus citations