Nanoraman spectroscopy in low temperature and ultrahigh vacuum environments

Authors

Rafael B. Jaculbia Surface and Interface Science Laboratory, RIKEN

Abstract

Raman spectroscopy is an indispensable tool for materials science research. It has been proven useful for investigating the properties of new materials and discovering their functions. Raman spectroscopy has high chemical sensitivity making it possible to differentiate between two samples having similar structures. Owing to the diffraction limit however, applications of Raman spectroscopy in nanoscale materials is particularly challenging. This, coupled with the inherently weak Raman scattering, has paved way for research trying to solve these fundamental problems. Tip-enhanced Raman spectroscopy (TERS) is one technique that can be used to attain both high spatial resolution and signal enhancement. In TERS, the tip of scanning probe microscope is utilized to direct the incident light to a small area greatly increasing the spatial resolution. Additionally, the tip increases both the excitation and the Raman scattered signal via electromagnetic and chemical enhancement. In this talk, I will present our work on STM-based TERS (STM-TERS) performed at low temperatures and ultrahigh vacuum. These conditions allow for good stability allowing us to investigate single molecules and other nanoscale materials.

About the Speaker

Rafael B. Jaculbia, Surface and Interface Science Laboratory, RIKEN

Rafael Jaculbia is a visiting researcher supported under the Postdoctoral Fellowships for Overseas Researchers' Program of the Japan Society for the Promotion of Science. He is a member of the Surface and Interface Science Laboratory in the Cluster for Pioneering Research in The Institute of Physical and Chemical Research (RIKEN), Japan under Dr.~Yousoo Kim. He was previously a special postdoctoral researcher in the same laboratory. His current work is on nearfield optics, in particular tip-enhanced Raman spectroscopy of single molecules and other nanomaterials. He obtained his BS, MS, and PhD degrees in Physics from the University of the Philippines Diliman in 2009, 2011 and 2016 respectively. In 2016, he received the Edgardo Gomez Award for outstanding research from the College of Science in University of the Philippines Diliman.

Downloads

Issue

2022: Proceedings of the 40th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2022-INV-2E-01

Section

Invited Presentations

Published

2022-08-26

How to Cite

[1]

RB Jaculbia, Nanoraman spectroscopy in low temperature and ultrahigh vacuum environments, Proceedings of the Samahang Pisika ng Pilipinas 40, SPP-2022-INV-2E-01 (2022). URL: https://proceedings.spp-online.org/article/view/SPP-2022-INV-2E-01.