21. Her research interests include VCSELs, high contrast gratings , and nanostructure growth. 22. Phase stepping one of the gratings is performed to retrieve the phase images. 23. Such gratings can be either transmissive or reflective. 24. Gratings with such small periodicity are called subwavelength gratings and exhibit special optical properties.25. Gratings with such small periodicity are called subwavelength gratings and exhibit special optical properties. 26. Another method for manufacturing diffraction gratings uses a photosensitive gel sandwiched between two substrates. 27. Holographic gratings are also used, as they allow more accurate discrimination of wavelengths. 28. Recently, an alternative to prisms and gratings has been developed : chirped mirrors. 29. Slender columns with Ionic capitals upheld the chiseled gratings balconies of the second floor. 30. It's ideal as a topping for pasta with fresh gratings of Parmesan cheese.
