Nanophotonics Laboratory Arup Neogi

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Nanophotonics Laboratory Arup Neogi

• Nanoscale photonic material and devices
  characterization facilities at UNT includes
• Photoluminescence (PL) measurement including
  UV-VIS-NIR wavelength regime
• Pico-nanosecond time-resolved PL spectroscopy
  using Hamamatsu Streak Camera
• UV-VIS Raman spectroscopy for strain estimation
  in semiconductor nanostructures
• Characterization of UV-visible laser diodes,
  strain measurement of IR materials

Time resolved PL of GaN quantum dots
UNT Physics
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Near-field Optical Microscopy

• Capability to image nanoscale optoelectronic
  structures ( 30 nm) using Nanonics Cryogenic
  near-field optical microscope (4 K 300 K)
• Tunable ultrafast light source ranging from 250
  nm 12 mm for near-field luminescence
  spectroscopy of light emitting nanoparticles

Near-field PL spectrum of a 2 nm single GaN/AlN
quantum dot emitting at 3.37 eV (scan area 450
sq. nm)
UNT Physics