Modeling an improved method for double modulation photo reflectance experiments
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2004
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| _version_ | 1876441574750027776 |
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| author | Manuel Hernández Calviño |
| author_facet | Manuel Hernández Calviño |
| contents | Modeling an improved method for double modulation photo reflectance experiments Manuel Hernández Calviño Rumen Ivanov Tsonchev Ingeniería Photo reflectance Double modulation This paper describes an improved method to be used in double modulation photo reflectance experiments, inorder to reduce the influence of parasitic effects in the useful signal. The method uses the inner and outer sectionsof a single chopper disk to modulate the monochromator and the laser beam, eliminating the need of complexelectronic filters, and two additional PIN photodiodes for scattered light compensation. The method has beennumerically simulated using LabVIEW in order to investigate the influence of the modulator finite switching timeand the finite resolution of the digital acquisition system. Results show that a relative error less than 1% can beachieved. 2004 artículo científico 1665-6423 https://www.redalyc.org/articulo.oa?id=47420107 en http://www.redalyc.org/revista.oa?id=474 Journal of Applied Research and Technology application/pdf Universidad Nacional Autónoma de México Journal of Applied Research and Technology (México) Num.1 Vol.2 |
| format | Artículo científico |
| id | redalyc_47420107 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Modeling an improved method for double modulation photo reflectance experiments Manuel Hernández Calviño Ingeniería Photo reflectance Double modulation Modeling an improved method for double modulation photo reflectance experiments Manuel Hernández Calviño Rumen Ivanov Tsonchev Ingeniería Photo reflectance Double modulation This paper describes an improved method to be used in double modulation photo reflectance experiments, inorder to reduce the influence of parasitic effects in the useful signal. The method uses the inner and outer sectionsof a single chopper disk to modulate the monochromator and the laser beam, eliminating the need of complexelectronic filters, and two additional PIN photodiodes for scattered light compensation. The method has beennumerically simulated using LabVIEW in order to investigate the influence of the modulator finite switching timeand the finite resolution of the digital acquisition system. Results show that a relative error less than 1% can beachieved. 2004 artículo científico 1665-6423 https://www.redalyc.org/articulo.oa?id=47420107 en http://www.redalyc.org/revista.oa?id=474 Journal of Applied Research and Technology application/pdf Universidad Nacional Autónoma de México Journal of Applied Research and Technology (México) Num.1 Vol.2 |
| title | Modeling an improved method for double modulation photo reflectance experiments |
| topic | Ingeniería Photo reflectance Double modulation |
| url | https://www.redalyc.org/articulo.oa?id=47420107 |