Loading...
Please wait, while we are loading the content...
Similar Documents
Zero-reflectivity high spatial-frequency rectangular-groove dielectric surface-relief gratings.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gaylord, Thomas K. Baird, William E. Moharam, M. G. Jim |
| Copyright Year | 1986 |
| Abstract | Using rigorous coupled-wave analysis, high spatial-frequency rectangular-groove surface-relief phase gratings are shown to be capable of exhibiting zero reflectivity. Thus these corrugated surfaces may act as antireflection coatings in a variety of applications. The diffraction characteristics of rectangular-groove surface-relief gratings are presented for several ratios of incident wavelength to grating period as a function of filling factor, groove depth, angle of incidence, and polarization. The conditions for zero reflectivity are identified. Results are compared with single-homogeneous-layer approximate theory results. In the limit of long wavelengths for an electromagnetic wave in a dielectric of refractive index n1 normally incident on a dielectric of index n2, it is determined that for antireflection behavior, the grating groove depth should be λ/4(n1n2)1/2 and the filling factor should be n1/(n1 + n2) or n2/(n1 + n2) for the electric field perpendicular or parallel to the grating vector, respectively. The spectral and angular responses of these gratings are like those of single-homogeneous-layer antireflection coatings. These gratings also exhibit birefringent retardation. |
| Starting Page | 4562 |
| Ending Page | 4562 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1364/AO.25.004562 |
| PubMed reference number | 18235823 |
| Journal | Medline |
| Volume Number | 25 |
| Issue Number | 24 |
| Alternate Webpage(s) | https://patentimages.storage.googleapis.com/fc/97/e5/409e6d47ef164a/US5779924.pdf |
| Alternate Webpage(s) | https://doi.org/10.1364/AO.25.004562 |
| Journal | Applied optics |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
