title: High-efficiency blazed diffractive optical elements for the violet wavelength fabricated by electron-beam lithography.
abstract: Blazed diffractive optical elements (DOEs) were studied for the violet wavelength by electron-beam lithography. By optimizing electron-beam writing parameters and electron-dose distributions, we fabricated eight kinds of grating (period A = 10-0.54 microgm) with excellent blazed structure. It has been demonstrated that the measured diffraction efficiency values agreed well with the rigorous theoretical ones. For the fine period of 0.54 microm, we confirmed a peak appearance of 75.6% (TE) experimentally. A wave aberration as small as approximately 0.01 lambda (rms) was obtained for the first-order diffracted wave from the fabricated DOEs. Blazed DOEs for the violet wavelength could be used as key devices in a high-density optical disk pickup of the next generation.
authors: Storage Media Systems Development Center, Matsushita Electric Industrial Company, Ltd, Moriguchi, Osaka, Japan. shiono@drl.mei.co.jp
authors: Teruhiro
authors: T
authors: Shiono
authors: Tetsuya
authors: T
authors: Hamamoto
authors: Koji
authors: K
authors: Takahara