Université de Neuchâtel

Design and Fabrication of Highly Efficient Fan-Out Elements

Herzig, Hans-Peter ; Prongué, Damien ; Dändliker, René

In: Japanese Journal of Applied Physics, 1990, vol. 29, no. 7, p. 1307-1309

This paper reports the calculation and fabrication of periodic phase structures fan-out elements with a theoretical conversion efficiency close to 100 percent and perfect uniformity. An efficiency of 92 percent was measured for a smooth kinoform structure fabricated in photoresist by laser beam writing lithography.

Université de Neuchâtel

High-efficiency continuous surface-relief gratings for two-dimensional array generation

Ehbets, Peter ; Herzig, Hans-Peter ; Prongué, Damien ; Gale, M. T.

In: Optics Letters, 1992, vol. 17, no. 13, p. 908-910

Continuous surface-relief phase for two-dimensional (2-D) array generation have been realized by laser-beam writing lithography. For a 9 x 9 fan-out element, a diffraction efficiency of 94% and a uniformity of better than 8% have been achieved. These are, to our knowledge, the best published results for 2-D surface-relief fan-out elements. Separable and nonseparable solutions for the design of...