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Lecture

Spectroscopy with Light

In course

PHYS-468: Physics of life

Life has emerged on our planet from physical principles such as molecular self-organization, thermodynamics, stochastics and iterative refinement. This course will introduce the physical methods to study life and will discuss the quantitative and physical ...

Description

This lecture covers the physics of light, including electromagnetic waves, particles (photons), interference, photoelectric effect, and the wave-particle dualism. It delves into the properties of light in different regions of the spectrum, such as infrared, visible, ultraviolet, and X-rays. The lecture also explores the concepts of spectroscopy, polarization, ellipticity, circular dichroism, Raman scattering, Stokes, and Anti-Stokes phenomena.

Instructor

Henning Paul-Julius Stahlberg

Positions: Since 2020 Prof. Physics, IPHYS, SB, EPFL, Switzerland 2009 – 2021 Prof. Structural Biology, Biozentrum, University Basel, Switzerland 2009 – 2010 Adj. Assoc. Prof. Molecular & Cellular Biology, UC Davis, CA, USA 2007 – 2009 Assoc. Prof. Molecular & Cellular Biology, UC Davis, CA, USA 2003 – 2007 Assist. Prof. Molecular & Cellular Biology, UC Davis, CA, USA Education: 2002 Habilitation, Biozentrum, University Basel, Switzerland 1997 – 2003 Postdoctoral Fellow, Biozentrum, University Basel, Switzerland 1992 – 1997 PhD Student, EPFL, Lausanne, Switzerland 1990 – 1991 Diploma Thesis in Solid State Physics, TU Berlin, Germany 1987 – 1993 Study of Physics, TU Berlin, Germany Selected Awards & Honors: 2009 W.M.Keck Award 2004 CAREER award, NSF, USA 2002 Habilitation, University Basel, Switzerland Selected Memberships: 2008 – 2013 Chancellor’s Fellow Award, UC Davis, CA, USA 2004 – 2009 Faculty of 1000 Since 1992 Swiss Society for Optics and Microscopy (SSOM)

Official source

Ontological neighbourhood

Chemistry

Physical chemistry: Spectroscopy

Related concepts (32)

Infrared spectroscopy

Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms. It can be used to characterize new materials or identify and verify known and unknown samples. The method or technique of infrared spectroscopy is conducted with an instrument called an infrared spectrometer (or spectrophotometer) which produces an infrared spectrum.

Ultraviolet–visible spectroscopy

UV spectroscopy or UV–visible spectrophotometry (UV–Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in part of the ultraviolet and the full, adjacent visible regions of the electromagnetic spectrum. Being relatively inexpensive and easily implemented, this methodology is widely used in diverse applied and fundamental applications. The only requirement is that the sample absorb in the UV-Vis region, i.e. be a chromophore. Absorption spectroscopy is complementary to fluorescence spectroscopy.

Raman spectroscopy

Raman spectroscopy (ˈrɑːmən) (named after Indian physicist C. V. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed. Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. Raman spectroscopy relies upon inelastic scattering of photons, known as Raman scattering.

Near-infrared spectroscopy

Near-infrared spectroscopy (NIRS) is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm). Typical applications include medical and physiological diagnostics and research including blood sugar, pulse oximetry, functional neuroimaging, sports medicine, elite sports training, ergonomics, rehabilitation, neonatal research, brain computer interface, urology (bladder contraction), and neurology (neurovascular coupling).

Light

Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light.

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