Sectroscopy


course ID

Lecturer

CFU

3

Length

14 Weeks

Semester DD

Second


Course details

A part of the course consists of lessons. There are a number of experimental activities in laboratorium in order to illustrate the main concepts of spectroscopy.

Light/matter interaction: microscopic approach . Dipole approximation, selection rules, line intensity and line shape. Natural broadening and lifetime of a quantum level, emission; collisional and Doppler broadening.
Macroscopical approach. Complex dielectric constant and index of refraction. Kramers-Krönig relation dispersion. Lorenz and Drude models.
Absorption spectroscopy and measurements, essential elements for an absorption set-up. Different sources of e.m. radiation. Dispersive devices, radiation sources and detectors. Spectrophotometers. Signal to Noise ratio. Sources of noise. Software methods for increasing S/N. Ellissometry: Time resolved spectroscopy
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Experimental section: Ellipsometry, Original Young experiments, Observation of light fluctuations, Absorption and emission measurements, Photon Counting and light statistics of different sources, Raman spectra

Objectives

LEARNING OUTCOMES:
The main goal is the knowledge of the spectroscopic analysis of materials, mostly by optical and electron spectroscopy.

KNOWLEDGE AND UNDERSTANDING:
knowledge of more relevant spectroscopic techniques and related set-up for practical analysis

APPLYING KNOWLEDGE AND UNDERSTANDING:
Understanding of the results coming from the different techniques and of the meaning of the results in connection with materials characterization.

MAKING JUDGEMENTS:
Saper autonomamente giudicare quali tecniche sono necessarie o più adatte per la individuazione di particolari proprietà dei materiali
Have the awardness on which technique is more appropriate or necerrary in orer to single out a specific propertiy of a material

COMMUNICATION SKILLS:
The student has to master the main common and specialistic words and expressions used in the experimental techniques and mut be able to communicate with proper language.

LEARNING SKILLS:
The student must be able to go further in the knowledge and understanding of analogue techniques in the field of spectroscopy.