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Dependence of Optical Constants on Film Thickness of Phase-Change Media
| Content Provider | Scilit |
|---|---|
| Author | Miao, X. S. Chong, T. C. Huang, Y. M. Lim, K. G. Tan, P. K. Shi, L. P. |
| Copyright Year | 1999 |
| Description | Journal: Japanese Journal of Applied Physics The optical constants of phase-change films are assumed to be constant regardless of film thickness in conventional optical design and thermal simulation of multilayer structure optical disks. However this assumption is not valid when the phase-change film thickness in the optical disks becomes very small. In this study, the dependence of the optical constants on the thickness of $Ge_{1}Sb_{2}Te_{4}$ phase-change films is investigated. The changes of the extinction coefficient k and the refractive index n (especially k) become significant when film thickness is in the range of 10 nm–30 nm, and become larger at shorter wavelengths such as the blue region. This dependence of optical constants (n and k) on the film thickness can be explained and confirmed based on the discontinuous film model of very thin film. These results are significant in improving the accuracy of optical design and thermal simulation of phase-change optical disks, as well as in the study of phase-change optical disks at shorter wavelengths. |
| Related Links | http://iopscience.iop.org/article/10.1143/JJAP.38.1638/pdf |
| ISSN | 00214922 |
| e-ISSN | 13474065 |
| DOI | 10.1143/jjap.38.1638 |
| Journal | Japanese Journal of Applied Physics |
| Issue Number | 3S |
| Volume Number | 38 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1999-03-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Japanese Journal of Applied Physics Optical Constants Film Thickness Phase Change Change Films Optical Design Thermal Simulation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Engineering |
