| Автор | Robert E Wagner |
| Автор | Andreas Mandelis |
| Дата выпуска | 1996-03-01 |
| dc.description | The effect of nonlinear carrier recombination on the photothermal modulated optical reflectance (PMOR) signal of a crystalline semiconductor has been theoretically modelled. The PMOR signal consists of both thermal and Drude (free-carrier) components, and nonlinear recombination influences it through its direct effect on the modulated carrier density, and its indirect effect on the modulated sample temperature. Quadratic recombination was shown to lead to a sublinear intensity dependence of the photocurrent amplitude at elevated optical excitation intensities; cubic recombination leads to a supralinear intensity dependence of the PMOR amplitude accompanied by a progressive phase lag dependence on pump laser-beam intensity. The effect of nonlinear carrier and heat-flux gradients was also considered and found to be negligible with PMOR detection. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Nonlinear photothermal modulated optical reflectance and photocurrent phenomena in crystalline semiconductors: I. Theoretical |
| Тип | paper |
| DOI | 10.1088/0268-1242/11/3/005 |
| Electronic ISSN | 1361-6641 |
| Print ISSN | 0268-1242 |
| Журнал | Semiconductor Science and Technology |
| Том | 11 |
| Первая страница | 289 |
| Последняя страница | 299 |
| Аффилиация | Robert E Wagner; Photothermal and Optoelectronic Diagnostics Laboratory, Department of Mechanical Engineering, University of Toronto, Toronto, Ontario M5S 1A4, Canada |
| Аффилиация | Andreas Mandelis; Photothermal and Optoelectronic Diagnostics Laboratory, Department of Mechanical Engineering, University of Toronto, Toronto, Ontario M5S 1A4, Canada |
| Выпуск | 3 |
