Raman spectroscopy is a valuable investigative technique rooted in optical and quantum-physics principles of Raman scattering. It entails shining a laser on a substance and studying the light scattered off its surface.
It is commonly used for non-invasive, non-destructive evaluation of material molecular composition. One intriguing aspect is its ability to analyze materials in clear or translucent containers, providing detailed information about chemical structure.
This FAQ delves into Raman scattering and spectroscopy from various angles, including optical physics, history, implementation, applications, instrumentation, and limitations.
Q: Why should electronic/electrical engineers be interested in this “optical” topic?
A: There are several reasons:
- Firstly, despite being an optical technique, it incorporates various electronic and electro-optical components such as LEDs, photodetectors, power supplies, signal processing chains, and data analysis.
- Secondly, electronics and optics are increasingly interconnected disciplines with the rise of electro-optical components and systems.
- Thirdly, there’s a growing focus on developing electro-optic systems-on-chip integrating optical and electronic functions.
Q: What is the fundamental principle of Raman scattering?
A: Raman scattering involves elastic and inelastic scattering when light interacts with a material, as depicted in Figure 1. While people commonly use “reflection” in everyday language, optical scientists refer to it as scattering.
