Steffen Michaelis
© privat

Dr. Steffen Michaelis de Vasconcellos

Akademischer Rat

Wilhelm-Klemm-Str. 10
48149 Münster

E-Mail: michaelis@uni-muenster.de
Phone: +49 251 83-39100
Fax: +49 251 83-38346

 

Research Interests

  • 2D Materials
  • Quantum Dots
  • Single Photon Emitter
  • Cavity QED
  • Quantum Computation and Coherent Control

Teaching

SS 2019

WS 2018/19

SS 2018

  • Experimentelle Übungen zur Festkörperspektroskopie

  • Experimentelle Übungen im Forschungsbereich

  • Integriertes Seminar zu aktuellen Problemen der Physik dimensionsreduzierter Festkörper

WS 2017/18

  • Experimentelle Übungen zur Festkörperspektroskopie

  • Experimentelle Übungen im Forschungsbereich

  • Integriertes Seminar zu aktuellen Problemen der Physik dimensionsreduzierter Festkörper

SS 2017

  • Experimentelle Übungen zur Festkörperspektroskopie

  • Experimentelle Übungen im Forschungsbereich

  • Integriertes Seminar zu aktuellen Problemen der Physik dimensionsreduzierter Festkörper

WS 2016/17

  • Übungen zur Physik der Kondensierten Materie
  • Experimentelle Übungen zur Festkörperspektroskopie

  • Experimentelle Übungen im Forschungsbereich

  • Integriertes Seminar zu aktuellen Problemen der Physik dimensionsreduzierter Festkörper

Academic Career

since 2013 Akademischer Rat at the University of Münster
2012 - 2013 Assistent at Chemnitz Technical University
2010 - 2012

Postdoc at the Laboratoire de Photonique et de Nanostructure (CNRS), Marcoussis, France

2004 - 2009 PhD student at University of Paderborn (Prof. A. Zrenner)
Dissertation "Coherent optoelectronic control of single excitons"
1999 - 2004

Studies of Physics at the University of Paderborn
Diploma thesis "Spectroscopy on electrically controllable, single quantum dots" (Prof. A. Zrenner)

Publications

  1. Thickness determination of MoS2, MoSe2, WS2 and WSe2 on transparent stamps used for deterministic transfer of 2D materials
    N. S. Taghavi, P. Gant, P. Huang, I. Niehues, R. Schmidt, S. Michaelis de Vasconcellos, R. Bratschitsch, M. García-Hernández, R. Frisenda and A. Castellanos-Gomez
    Nano Research in press (2019), https://doi.org/10.1007/s12274-019-2424-6
  2. Thickness‐Dependent Refractive Index of 1L, 2L, and 3L MoS2, MoSe2, WS2, and WSe2
    C. Hsu, R. Frisenda, R. Schmidt, A. Arora, S. M. Vasconcellos, R. Bratschitsch, H. S. J. der Zant and A. Castellanos‐Gomez
    Advanced Optical Materials 1900239 (2019), https://doi.org/10.1002/adom.201900239
  3. Phonon-assisted emission and absorption of individual color centers in hexagonal boron nitride
    D. Wigger, R. Schmidt, O. Del Pozo-Zamudio, J. A. Preuß, P. Tonndorf, R. Schneider, P. Steeger, J. Kern, Y. Khodaei, J. Sperling, S. Michaelis de Vasconcellos, R. Bratschitsch and T. Kuhn
    2D Materials 6, 035006 (2019), https://doi.org/10.1088/2053-1583/ab1188
  4. Interlayer excitons in bilayer MoS2 under uniaxial tensile strain
    I. Niehues, A. Blob, T. Stiehm, S. Michaelis de Vasconcellos and R. bratschitsch
    Nanoscale in press (2019), https://doi.org/10.1039/c9nr03332g
  5. Zeeman spectroscopy of excitons and hybridization of electronic states in few-layer WSe2, MoSe2 and MoTe2
    A. Arora, M. Koperski, A. Slobodeniuk, K. Nogajewski, R. Schmidt, R. Schneider, M. R. Molas, S. Michaelis de Vasconcellos, R. Bratschitsch and M. Potemski
    2D Materials 6, 015010 (2018), https://doi.org/10.1088/2053-1583/aae7e5
  6. Thickness-Dependent Differential Reflectance Spectra of Monolayer and Few-Layer MoS2, MoSe2, WS2 and WSe2
    Y. Niu, S. Gonzalez-Abad, R. Frisenda, P. Marauhn, M. Drüppel, P. Gant, R. Schmidt, N. Taghavi, D. Barcons, A. Molina-Mendoza, S. Michaelis de Vasconcellos, R. Bratschitsch, D. Perez De Lara, M. Rohlfing and A. Castellanos-Gomez
    Nanomaterials 8, 725 (2018), https://doi.org/10.3390/nano8090725
  7. Magnetic-Field-Dependent THz Emission of Spintronic TbFe/Pt Layers
    R. Schneider, M. Fix, R. Heming, S. Michaelis de Vasconcellos, M. Albrecht and R. Bratschitsch
    ACS Photonics 5, 3936-3942 (2018), https://doi.org/10.1021/acsphotonics.8b00839
  8. Exciton–phonon coupling in mono- and bilayer MoTe2
    S. Helmrich, R. Schneider, A. W. Achtstein, A. Arora, B. Herzog, S. Michaelis de Vasconcellos, M. Kolarczik, O. Schöps, R. Bratschitsch, U. Woggon and N. Owschimikow
    2D Materials 5, 045007 (2018), https://doi.org/10.1088/2053-1583/aacfb7
  9. Strain transfer across grain boundaries in MoS2 monolayers grown by chemical vapor deposition
    I. Niehues, A. Blob, T. Stiehm, R. Schmidt, V. Jadriško, B. Radatović, D. Čapeta, M. Kralj, S. Michaelis de Vasconcellos and R. Bratschitsch
    2D Materials 5, 031003 (2018), https://doi.org/10.1088/2053-1583/aaba9a
  10. Inverted valley polarization in optically excited transition metal dichalcogenides
    G. Berghäuser, I. Bernal-Villamil, R. Schmidt, R. Schneider, I. Niehues, P. Erhart, S. Michaelis de Vasconcellos, R. Bratschitsch, A. Knorr and E. Malic
    Nature Communications 9, 971 (2018), https://doi.org/10.1038/s41467-018-03354-1
  11. Exciton broadening and band renormalization due to Dexter-like intervalley coupling
    I. Bernal-Villamil, G. Berghäuser, M. Selig, I. Niehues, R. Schmidt, R. Schneider, P. Tonndorf, P. Erhart, S. Michaelis de Vasconcellos, R. Bratschitsch, A. Knorr and E. Malic
    2D Materials 5, 025011 (2018), https://doi.org/10.1088/2053-1583/aaaa8b
  12. Strain Control of Exciton–Phonon Coupling in Atomically Thin Semiconductors
    I. Niehues, R. Schmidt, M. Drüppel, P. Marauhn, D. Christiansen, M. Selig, G. Berghäuser, D. Wigger, R. Schneider, L. Braasch, R. Koch, A. Castellanos-Gomez, T. Kuhn, A. Knorr, E. Malic, M. Rohlfing, S. Michaelis de Vasconcellos and R. Bratschitsch
    Nano Letters 18, 1751-1757 (2018), https://doi.org/10.1021/acs.nanolett.7b04868
  13. Valley-contrasting optics of interlayer excitons in Mo- and W-based bulk transition metal dichalcogenides
    A. Arora, T. Deilmann, P. Marauhn, M. Drüppel, R. Schneider, M. R. Molas, D. Vaclavkova, S. Michaelis de Vasconcellos, M. Rohlfing, M. Potemski and R. Bratschitsch
    Nanoscale 10, 15571-15577 (2018), https://doi.org/10.1039/c8nr03764g
  14. Phonon Sidebands in Monolayer Transition Metal Dichalcogenides
    D. Christiansen, M. Selig, G. Berghäuser, R. Schmidt, I. Niehues, R. Schneider, A. Arora, S. Michaelis de Vasconcellos, R. Bratschitsch, E. Malic and A. Knorr
    Physical Review Letters 119, 187402 (2017), https://doi.org/10.1103/physrevlett.119.187402
  15. Interlayer excitons in a bulk van der Waals semiconductor
    A. Arora, M. Drüppel, R. Schmidt, T. Deilmann, R. Schneider, M. R. Molas, P. Marauhn, S. Michaelis de Vasconcellos, M. Potemski, M. Rohlfing and R. Bratschitsch
    Nature Communications 8, 639 (2017), https://doi.org/10.1038/s41467-017-00691-5
  16. On-Chip Waveguide Coupling of a Layered Semiconductor Single-Photon Source
    P. Tonndorf, O. Del Pozo-Zamudio, N. Gruhler, J. Kern, R. Schmidt, A. I. Dmitriev, A. P. Bakhtinov, A. I. Tartakovskii, W. Pernice, S. Michaelis de Vasconcellos and R. Bratschitsch
    Nano Letters 17, 5446-5451 (2017), https://doi.org/10.1021/acs.nanolett.7b02092
  17. Biaxial strain tuning of the optical properties of single-layer transition metal dichalcogenides
    R. Frisenda, M. Drüppel, R. Schmidt, S. Michaelis de Vasconcellos, D. Perez de Lara, R. Bratschitsch, M. Rohlfing and A. Castellanos-Gomez
    npj 2D Materials and Applications 1, 10 (2017), https://doi.org/10.1038/s41699-017-0013-7
  18. Highly Anisotropic in-Plane Excitons in Atomically Thin and Bulklike 1T′-ReSe2
    A. Arora, J. Noky, M. Drüppel, B. Jariwala, T. Deilmann, R. Schneider, R. Schmidt, O. Del Pozo-Zamudio, T. Stiehm, A. Bhattacharya, P. Krüger, S. Michaelis de Vasconcellos, M. Rohlfing and R. Bratschitsch
    Nano Letters 17, 3202-3207 (2017), https://doi.org/10.1021/acs.nanolett.7b00765
  19. Polarization contrast scattering spectroscopy of individual metal nanoantennas
    T. Stiehm, J. Kern, R. Schmidt, S. Michaelis de Vasconcellos and R. Bratschitsch
    Applied Physics B 123, 150 (2017), https://doi.org/10.1007/s00340-017-6727-6
  20. Single-photon emitters in GaSe
    P. Tonndorf, S. Schwarz, J. Kern, I. Niehues, O. Del Pozo-Zamudio, A. I. Dmitriev, A. P. Bakhtinov, D. N. Borisenko, N. N. Kolesnikov, A. I. Tartakovskii, S. Michaelis de Vasconcellos and R. Bratschitsch
    2D Materials 4, 021010 (2017), https://doi.org/10.1088/2053-1583/aa525b
  21. Magnetic-Field-Induced Rotation of Polarized Light Emission from Monolayer WS2
    R. Schmidt, A. Arora, G. Plechinger, P. Nagler, A. Granados del Águila, M. V. Ballottin, P. C. M. Christianen, S. Michaelis de Vasconcellos, C. Schüller, T. Korn and R. Bratschitsch
    Physical Review Letters 117, 077402 (2016), https://doi.org/10.1103/physrevlett.117.077402
  22. Nanoscale Positioning of Single-Photon Emitters in Atomically Thin WSe2
    J. Kern, I. Niehues, P. Tonndorf, R. Schmidt, D. Wigger, R. Schneider, T. Stiehm, S. Michaelis de Vasconcellos, D. E. Reiter, T. Kuhn and R. Bratschitsch
    Advanced Materials 28, 7101-7105 (2016), https://doi.org/10.1002/adma.201600560
  23. Reversible uniaxial strain tuning in atomically thin WSe2
    R. Schmidt, I. Niehues, R. Schneider, M. Drüppel, T. Deilmann, M. Rohlfing, S. Michaelis de Vasconcellos, A. Castellanos-Gomez and R. Bratschitsch
    2D Materials 3, 021011 (2016), https://doi.org/10.1088/2053-1583/3/2/021011
  24. Nanoantenna-controlled radiation pattern of the third-harmonic emission
    T. Stiehm, J. Kern, M. Jürgensen, S. Michaelis de Vasconcellos and R. Bratschitsch
    Applied Physics B 122, 119 (2016), https://doi.org/10.1007/s00340-016-6390-3
  25. Ultrafast Coulomb-Induced Intervalley Coupling in Atomically Thin WS2
    R. Schmidt, G. Berghäuser, R. Schneider, M. Selig, P. Tonndorf, E. Malić, A. Knorr, S. Michaelis de Vasconcellos and R. Bratschitsch
    Nano Letters 16, 2945-2950 (2016), https://doi.org/10.1021/acs.nanolett.5b04733
  26. Nanoantenna-Enhanced Light–Matter Interaction in Atomically Thin WS2
    J. Kern, A. Trügler, I. Niehues, J. Ewering, R. Schmidt, R. Schneider, S. Najmaei, A. George, J. Zhang, J. Lou, U. Hohenester, S. Michaelis de Vasconcellos and R. Bratschitsch
    ACS Photonics 2, 1260-1265 (2015), https://doi.org/10.1021/acsphotonics.5b00123
  27. Single-photon emission from localized excitons in an atomically thin semiconductor
    P. Tonndorf, R. Schmidt, R. Schneider, J. Kern, M. Buscema, G. A. Steele, A. Castellanos-Gomez, H. S. J. van der Zant, S. Michaelis de Vasconcellos and R. Bratschitsch
    Optica 2, 347 (2015), https://doi.org/10.1364/optica.2.000347
  28. Photovoltaic and Photothermoelectric Effect in a Double-Gated WSe2 Device
    D. J. Groenendijk, M. Buscema, G. A. Steele, S. Michaelis de Vasconcellos, R. Bratschitsch, H. S. J. van der Zant and A. Castellanos-Gomez
    Nano Letters 14, 5846-5852 (2014), https://doi.org/10.1021/nl502741k
  29. Selective Raman modes and strong photoluminescence of gallium selenide flakes on sp2 carbon
    R. D. Rodriguez, S. Müller, E. Sheremet, D. R. T. Zahn, A. Villabona, S. A. Lopez-Rivera, P. Tonndorf, S. Michaelis de Vasconcellos and R. Bratschitsch
    Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena 32, 04E106 (2014), https://doi.org/10.1116/1.4881995
  30. Ultrafast spin dynamics in magnetic wide-bandgap semiconductors
    M. Raskin, T. Stiehm, A. W. Cohn, K. M. Whitaker, S. T. Ochsenbein, S. Michaelis de Vasconcellos, M. S. Brandt, D. R. Gamelin and R. Bratschitsch
    physica status solidi (b) 251, 1685-1693 (2014), https://doi.org/10.1002/pssb.201350239
  31. Controlling Spontaneous Emission with Plasmonic Optical Patch Antennas
    C. Belacel, B. Habert, F. Bigourdan, F. Marquier, J. Hugonin, S. Michaelis de Vasconcellos, X. Lafosse, L. Coolen, C. Schwob, C. Javaux, B. Dubertret, J. Greffet, P. Senellart and A. Maitre
    Nano Letters 13, 1516-1521 (2013), https://doi.org/10.1021/nl3046602
  32. Photoluminescence emission and Raman response of monolayer MoS2, MoSe2, and WSe2
    P. Tonndorf, R. Schmidt, P. Böttger, X. Zhang, J. Börner, A. Liebig, M. Albrecht, C. Kloc, O. Gordan, D. R. T. Zahn, S. Michaelis de Vasconcellos and R. Bratschitsch
    Optics Express 21, 4908 (2013), https://doi.org/10.1364/oe.21.004908
  33. Bright solid-state sources of indistinguishable single photons
    O. Gazzano, S. Michaelis de Vasconcellos, C. Arnold, A. Nowak, E. Galopin, I. Sagnes, L. Lanco, A. Lemaître and P. Senellart
    Nature Communications 4, 1425 (2013), https://doi.org/10.1038/ncomms2434
  34. Single photon source using confined Tamm plasmon modes
    O. Gazzano, S. Michaelis de Vasconcellos, K. Gauthron, C. Symonds, P. Voisin, J. Bellessa, A. Lemaître and P. Senellart
    Applied Physics Letters 100, 232111 (2012), https://doi.org/10.1063/1.4726117
  35. Evidence for Confined Tamm Plasmon Modes under Metallic Microdisks and Application to the Control of Spontaneous Optical Emission
    O. Gazzano, S. Michaelis de Vasconcellos, K. Gauthron, C. Symonds, J. Bloch, P. Voisin, J. Bellessa, A. Lemaître and P. Senellart
    Physical Review Letters 107, 247402 (2011), https://doi.org/10.1103/physrevlett.107.247402
  36. Spatial, spectral, and polarization properties of coupled micropillar cavities
    S. Michaelis de Vasconcellos, A. Calvar, A. Dousse, J. Suffczyński, N. Dupuis, A. Lemaître, I. Sagnes, J. Bloch, P. Voisin and P. Senellart
    Applied Physics Letters 99, 101103 (2011), https://doi.org/10.1063/1.3632111
  37. Electrically driven intentionally positioned single quantum dot
    M. Mehta, D. Reuter, A. D. Wieck, S. Michaelis de Vasconcellos, A. Zrenner and C. Meier
    physica status solidi (c) 8, 1182-1185 (2011), https://doi.org/10.1002/pssc.201000828
  38. An intentionally positioned (In,Ga)As quantum dot in a micron sized light emitting diode
    M. Mehta, D. Reuter, A. D. Wieck, S. Michaelis de Vasconcellos, A. Zrenner and C. Meier
    Applied Physics Letters 97, 143101 (2010), https://doi.org/10.1063/1.3488812
  39. Resonant photocurrent-spectroscopy of individual CdSe quantum dots
    M. Panfilova, S. Michaelis de Vasconcellos, A. Pawlis, K. Lischka and A. Zrenner
    Physica E: Low-dimensional Systems and Nanostructures 42, 2521-2523 (2010), https://doi.org/10.1016/j.physe.2010.01.013
  40. Intentionally positioned self-assembled InAs quantum dots in an electroluminescent p–i–n junction diode
    M. Mehta, D. Reuter, A. Melnikov, A. D. Wieck, S. Michaelis de Vasconcellos, T. Baumgarten, A. Zrenner and C. Meier
    Physica E: Low-dimensional Systems and Nanostructures 42, 2749-2752 (2010), https://doi.org/10.1016/j.physe.2009.12.053
  41. Coherent control of a single exciton qubit by optoelectronic manipulation
    S. Michaelis de Vasconcellos, S. Gordon, M. Bichler, T. Meier and A. Zrenner
    Nature Photonics 4, 545-548 (2010), https://doi.org/10.1038/nphoton.2010.124
  42. Exciton spectroscopy on single CdSe/ZnSe quantum dot photodiodes
    S. Michaelis de Vasconcellos, A. Pawlis, C. Arens, M. Panfilova, A. Zrenner, D. Schikora and K. Lischka
    Microelectronics Journal 40, 215-217 (2009), https://doi.org/10.1016/j.mejo.2008.07.055
  43. Micro-Raman imaging and micro-photoluminescence measurements of strain in ZnMgSe/ZnSe microdiscs
    M. Panfilova, A. Pawlis, C. Arens, S. Michaelis de Vasconcellos, G. Berth, K. Hüsch, V. Wiedemeier, A. Zrenner and K. Lischka
    Microelectronics Journal 40, 221-223 (2009), https://doi.org/10.1016/j.mejo.2008.07.056
  44. Coherent optoelectronics with single quantum dots
    A. Zrenner, P. Ester, S. Michaelis de Vasconcellos, M. C. Hübner, L. Lackmann, S. Stufler and M. Bichler
    Journal of Physics: Condensed Matter 20, 454210 (2008), https://doi.org/10.1088/0953-8984/20/45/454210
  45. p-Shell Rabi-flopping and single photon emission in an InGaAs/GaAs quantum dot
    P. Ester, L. Lackmann, M. Hübner, S. Michaelis de Vasconcellos, A. Zrenner and M. Bichler
    Physica E: Low-dimensional Systems and Nanostructures 40, 2004-2006 (2008), https://doi.org/10.1016/j.physe.2007.09.129
  46. Single photon emission based on coherent state preparation
    P. Ester, L. Lackmann, S. Michaelis de Vasconcellos, M. C. Hübner, A. Zrenner and M. Bichler
    Applied Physics Letters 91, 111110 (2007), https://doi.org/10.1063/1.2784173
  47. High resolution photocurrent-spectroscopy of a single quantum dot
    P. Ester, S. Stufler, S. Michaelis de Vasconcellos, M. Bichler and A. Zrenner
    physica status solidi (c) 3, 3722-3725 (2006), https://doi.org/10.1002/pssc.200671572
  48. Quantum interferences of a single quantum dot in the case of detuning
    S. Michaelis de Vasconcellos, S. Stufler, S. Wegner, P. Ester, A. Zrenner and M. Bichler
    physica status solidi (c) 3, 3730-3733 (2006), https://doi.org/10.1002/pssc.200671585
  49. Recent developments in single dot coherent devices
    A. Zrenner, S. Stufler, P. Ester, S. Michaelis de Vasconcellos, M. Hübner and M. Bichler
    physica status solidi (b) 243, 3696-3708 (2006), https://doi.org/10.1002/pssb.200642339
  50. Quantum interferences of a single quantum dot in the case of detuning
    S. Michaelis de Vasconcellos, S. Stufler, S. Wegner, P. Ester, A. Zrenner and M. Bichler
    Physical Review B 74, 081304 (2006), https://doi.org/10.1103/physrevb.74.081304
  51. Ramsey fringes in a single InGaAs/GaAs quantum dot
    P. Ester, S. Stufler, S. Michaelis de Vasconcellos, M. Bichler and A. Zrenner
    physica status solidi (b) 243, 2229-2232 (2006), https://doi.org/10.1002/pssb.200668028