Université de Neuchâtel

Diffraction from metallic gratings with locally varying profile forms

Tompkin Wayne R. ; Staub, René ; Schilling, Andreas ; Herzig, Hans-Peter

In: Optics Letters, 1999, vol. 24, no. 2, p. 71-73

Measurements of the diffraction characteristics of one-dimensional surface-relief gratings of locally varying profile are compared with rigorous diffraction theory. These gratings result from the superposition of two linear sinusoidal gratings of uniform depth for which the relative phase between the two gratings varies slowly with position. The resultant surface profile exhibits a relatively...

Université de Neuchâtel

High-carrier-frequency fan-out gratings fabricated by total internal reflection holographic lithography

Ehbets, Peter ; Herzig, Hans-Peter ; Kuittinen, Markku ; Clube, Francis S. M. ; Darbellay, Yves

In: Optical Engineering, 1995, vol. 34, no. 8, p. 2377-2383

Total internal reflection (TIP) holographic lithography is applied to the fabrication of binary diffractive optical elements with submicrometer surface relief features. The recording conditions for the intermediate TIR volume hologram, used for high-resolution proximity printing, are discussed. In particular, the fabrication of efficient high-carrier-frequency fan-out gratings is considered and...