UTS-NSOM setup
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Acquisition of Ultrafast Spectroscopy Instrumentation for Materials Research and Education James L. Merz, University of Notre Dame, DMR 0619725 • Ultrafast temporal spectroscopy (UTS) of nanostructured materials was combined with near-field scanning optical microscopy (NSOM) having spatial resolution 50 nm (see Fig1). • A number of significant results were realized with this novel system: - Effect of residual chemicals on recombination dynamics of single of colloidal CdSe nanowires was revealed for the first time. - Recombination dynamics of single CdTe/ZnTe/GaSb quantum dots was measured for the first time, allowing probing their size dispersion. - Wigner localization was demonstrated in emission spectra of single self-organized InP/GaInP quantum dots. - Purcell effect was measured for whispering-gallery modes GaInP laser II m- objective m-PL im aging w ide-field laserI CCD topography and im aging N SO M spectrom eter PM T CCD cam era N SO M 700 800 Intensity W avelength(nm) CW spectra 2.0µm 2.0µm fiber probe Streak cam era UTS UTS-NSOM setup T=2-300 K
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Acquisition of Ultrafast Spectroscopy Instrumentation for Materials Research and Education James L. Merz, University of Notre Dame, DMR 0619725. - PowerPoint PPT Presentation
Transcript of UTS-NSOM setup
Acquisition of Ultrafast Spectroscopy Instrumentation for Materials Research and Education
James L. Merz, University of Notre Dame, DMR 0619725
• Ultrafast temporal spectroscopy (UTS) of nanostructured materials was combined with near-field scanning optical microscopy (NSOM) having spatial resolution 50 nm (see Fig1).
• A number of significant results were realized with this novel system:
- Effect of residual chemicals on recombination dynamics of single of colloidal CdSe nanowires was revealed for the first time.
- Recombination dynamics of single CdTe/ZnTe/GaSb quantum dots was measured for the first time, allowing probing their size dispersion.
- Wigner localization was demonstrated in emission spectra of single self-organized InP/GaInP quantum dots.
- Purcell effect was measured for whispering-gallery modes GaInP micro-discs with embedded InP quantum dots
laser II
m-objective
m-PL imagingwide-field
laser I
CCD
topography and imaging NSOM
spectrometer
PMT
CCDcamera
NSOM
700 800
Inte
nsi
ty
Wavelength (nm)CW spectra
2.0µm 2.0µm
fiber probe Streak camera
UTS
UTS-NSOM setup
T=2-300 K
Acqusition of Ultrafast Spectroscopy Instrumentation for Materials Research and Education
James L. Merz, University of Notre Dame, DMR 0619725
The UTS-NSOM system developed in the Nano-optics lab at the University of Notre Dame was used for collaborative research with other ND faculty to study effects of oxidation on GaAs/AlGaAs lasers (D. Hall, EE), emission properties of colloidal CdSe nanowires (M. Kuno, Chemistry and Biochemistry), CdSe/ZnTe quantum dots (J. Furdyna, Physics) and with a number of international collaborators to study recombination dynamics of InGaN blue-green quantum wells (V. Sizov, Ioffe Institute, Russia), carrier diffusion in GaInP solar cell epi-layers (S. Mintairov, Ioffe Institute, Russia) and decay of whispery gallery modes in InP/GaInP micro-disc lasers (K. Lemr, Palacky University, Czech Republic).
UTS-NSOM system and its users: Karel Lemr (visiting student from Palacky University, Czech Republic), Alexander Mintairov (Research Professor) and graduate students from Electrical Engineering department: Yan He, Chris Seibert and Joseph Herzog
