Nano Raman microscope for high spatial and spectral resolution characterization of atomically thin electronic materials
Abstract
Nano Raman microscope for high spatial and spectral resolution characterization of atomically thin electronic materialsA high spectral resolution Raman microscope with tip-enhanced optical capabilities for nanoscale materials characterization is proposed for the analysis of two-dimensional (2D), atomically-thin layers and van der Waals (vdW) heterostructures. This instrument at the University of California, Berkeley, will benefit a FY2019 ONR Young Investigator Program (YIP) Award(Award no. N000141912199) titled Van der Waals engineering for electrochemically tunable quantum materials, D. Kwabena Bediako, University of California, Berkeley, principal investigator, start date April 15, 2019. The new fully automated instrument will provide 10 nm spatial resolution and < 1 cm1 spectral resolution, a wide detection range from 400 nm to 1100nm, and the ability to take measurements at low Raman shifts from 50 cm1. This confocal plus tip-enhanced microscope will push the limits of the proposed directions in the ONR YIP grant.Scientifically, this system will establish new research capabilities that will enhance our ONR YIP effort in the following ways: (1) enable nanoscale resolution of the homogeneity and purity of synthesized 2D superconductor layers, (2) provide a rapid and precise method for the structuralanalysis of vdW heterostructures and 2D superconducting superlattices, and (3) permit the highresolution interrogation of air-sensitive materials and electrochemical reactions for the manipulation superconductivity in nanoscale materials. The new tip-enhanced Raman spectroscopy (TERS) and tip-enhanced photoluminescence (TEPL) capabilities will make itpossible to undertake rapid chemical analysis of atomically thin materials at the nanoscale without the need for the extremely time-intensive fabrication steps and specialized fragile substrates often required for other nanoscale imaging tools like transmission electron microscopy (TEM) and scanning tunneling microscopy (STM). With the funding of this DURIP, students at a variety oflevels (high school interns, freshman to senior undergraduate laboratory assistants, graduate students, and postdoctoral researchers) will be exposed to cutting-edge nanoscale optical spectroscopic characterization to complement the materials synthesis methods, nanofabrication techniques, solid-state physics, and electron microscopy expertise they will develop in our researchprogram.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 17, 2020
- Source ID
- N000142012599
Entities
People
- Daniel Bediako
Organizations
- Office of Naval Research
- United States Navy
- University of California Regents