2014 users committee meeting tallahassee fl october 10 11 2014 n.
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2014 Users Committee Meeting Tallahassee, FL October 10-11, 2014
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  1. LowT / highB optical magneto-spectroscopy Dmitry Smirnov 2014 Users Committee Meeting Tallahassee, FL October 10-11, 2014

  2. LowT / highB optical magneto-spectroscopy Dmitry Smirnov Techniques and capabilities Users / Publications Recent developments and research highlights Future efforts

  3. CW optical spectroscopy in Vis-IR-THz Basov et al, RMP 83 (2011) • High B, Low T • Sensitivity (S/N) • Spectral coverage and resolution • Spatial resolution, scanning (size does matter !) • Reliable instrumentation • Magneto-spectroscopy as a user facility Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  4. Techniques and capabilities: CW optical spectroscopy in Vis-IR-THz Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  5. 17 user’s groups in magneto-optics (since 1/01/2012) ~10-12 weeks/yearof magneto-optics support Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  6. 17 publications (since 1/01/2012) Other PRL PRB published submitted Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  7. 17 publications (since 1/01/2012) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  8. Recent and current experimental developments • Spatially resolved lowT / highB CW optical spectroscopy (Vis) • Low-frequency Raman scattering spectroscopy (<100cm-1) • MIR spectroscopy with continuously tunable QCLs (6-12um) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  9. Excitation • fiber • Spatially resolved lowT / highB CW optical spectroscopy (PL, Raman, PC, reflectance, …) • Collection • fiber • Cell#9 • 31T • SCM • Sample plate • ~ 1.5 mm • Piezo-stages • ~ 2-3 mm travel Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  10. Spatially resolved lowT / highB CW optical spectroscopy (PL, Raman, PC, reflectance, …) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  11. LowT / highB CW optical spectroscopy: • research examples Polarized magneto-PL measured on GaAs/AlGaAs QH bilayers at 300mK Magneto-Raman data revealing charge-lattice-spin coupling in Co[N(CN)2]2 Brinzariet al, PRL 111, 047202 (2013) Pusepet al, PRL 109, 046802 (2012). Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  12. LowT / highB CW optical spectroscopy: • research examples Tuning phonons in graphene by Landau quantization • B0MPR~ 25T • Magnetic field • Frequency Ando, Phys. Soc. Jpn. 76, 024712 (2007) Kim et al, PRL 110, 227402 (2013) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  13. LowT / highB CW optical spectroscopy: • research examples Tuning phonons in graphene by Landau quantization • B0MPR~ 25T • Magnetic field • Frequency Ando, Phys. Soc. Jpn. 76, 024712 (2007) Kim et al, PRL 110, 227402 (2013) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  14. LowT / highB CW optical spectroscopy: • research examples Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2 Y. Li et al, arXiv:1409.8538 (submitted to PRL) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  15. LowT / highB CW optical spectroscopy: • research examples Valley Splitting and Polarization by the Zeeman Effect in Monolayer MoSe2 Y. Li et al, arXiv:1409.8538 (submitted to PRL) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014

  16. Future efforts • Spatially resolved lowT / highB optical spectroscopy (Vis) • Improve spatial resolution and stability (currently, ~3um in SCM, B<18T) • PL spectroscopy at dilfridge temperatures (SCM1) • Voight geometry, angular resolved PL measurements (SCM2) • Make spatially resolved micro-spectroscopy more user-friendly !!! • Low-frequency Raman scattering spectroscopy (<100cm-1) Need a dedicated SCM !!! • MIR spectroscopy with continuously tunable QCLs (6-12um) at fields up to 45T • Light-pipe free FTIR spectroscopy (17.5T, SCM3) Dmitry Smirnov, LowT/highB CW optical magneto-spectroscopy2014 Users Committee Meeting, October 10-11, 2014