Scanning probe, Optics, Low dimensional quantum materials
Activity Lead: Scanning near-field optical microscopy lab (Molecular Foundry)
AIST-NT AFM and home built optical path
Fabrication of Nanoimprinted pyramid Tip
Correlation SEM, Height (Shear-force), PL mappings
The ability to simultaneously collect an optical spectrum and topographic information at the nanosize pixel step provides critical insight into understanding how local material properties and structure result in the macroscopic functionality of a material. The near-field optics lab, led by Dr. Alex Weber-Bargioni, is equipped with the AIST-NT scanning probe system, which has optical access from the top, side, and bottom of the scanning stage. We also fabricate our own scanning probe based on fiber using the high throughput nanoimprinting method developed in nanofabrication facilities. Currently, I apply this homemade tip for studying the exciton-plasmon coupling effects.
Ion/Electron beams for nano-optics
Zeiss Crossbeam 1540 EsB
Transmission Electron Microscope (TEM) view of the FIB-milled plasmonic gap
(Credit: V. Altoe)
Sub-20 nm, 'FIB-Free', Broadband-response, Polarization-sensitive, Near-field Probe
Two-dimensional material preparation/transfer
2d luminescent semiconductor
Optical image
Height image
''Stars in atomic layer island''
Bright, spatially localized emission mapping at the nanobubble site (~100s nm)
Nanowire/microrods growth and Optical engineering
ZnO nanowire growth: Spinning Coating/Annealing of Seed layer and Chemical bath deposition
Growth on two 4-inch silicon wafers
Green light emission enhancement of nanowires through desulfurization treatment
White light emission after annealing
Simulation/Modelling Works
Phenomenological modelling of nanowires thin film: Sketches of the sample (left) and the used model (right)
Calculation matrix