Investigation of polarization effects for nanosecond laser-induced breakdown spectroscopy
| Autor: | David W. Hahn, Heh-Young Moon, Nicoló Omenetto, Michael E. Asgill |
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| Rok vydání: | 2010 |
| Předmět: |
Polarization rotator
Chemistry business.industry Atomic emission spectroscopy Nanosecond Laser Polarization (waves) Molecular physics Atomic and Molecular Physics and Optics Analytical Chemistry law.invention Optics law Degree of polarization Laser-induced breakdown spectroscopy Spectroscopy business Instrumentation |
| Zdroj: | Spectrochimica Acta Part B: Atomic Spectroscopy. 65:1033-1040 |
| ISSN: | 0584-8547 |
| DOI: | 10.1016/j.sab.2010.11.010 |
| Popis: | The spectral and temporal polarization dependencies of nanosecond laser-induced plasmas are explored for analysis of gaseous and solid samples using various experimental configurations. Plasma emission measurements were resolved into vertical and horizontal polarization components, and the ratio of the two polarization-resolved measurements was calculated for each sample and configuration. For the solid target, measurements were recorded with the sample oriented both normal to the incident laser beam as well as at oblique angles of incidence. The results for the breakdown of a pure, nitrogen gaseous sample revealed no degree of polarization in either the continuum or atomic emission, with the ratios of the horizontally-to-vertically resolved plasma emission showing values equal to unity when resolved both temporally and spectrally. The analysis of both copper and steel solid samples also showed no polarization dependency in the spectral and temporal data when the laser was incidentally normal to the sample surface. For oblique angles of incidence, some polarization ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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