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

Design and characterization of a tunable polarization-independent resonant grating filter

Niederer, Guido ; Nakagawa, Wataru ; Herzig, Hans-Peter ; Thiele, Hans

In: Optics Express, 2005, vol. 13, no. 6, p. 2196-2200

We present the design, analysis and characterization of a polarization-independent tunable resonant grating filter. Polarization independence is achieved by setting the plane of incidence parallel to the grating grooves and optimizing the fill factor to obtain a strong reflection peak for all incident polarization states. Experimental measurements show that approximate angular insensitivity to...

Université de Neuchâtel

Tunable, Oblique Incidence Resonant Grating Filter for Telecommunications

Niederer, Guido ; Herzig, Hans-Peter ; Shamir, Joseph ; Thiele, Hans ; Schnieper, Marc ; Zschokke, Christian

In: Applied Optics, 2004, vol. 43, no. 8, p. 1683-1694

We have designed a tunable, oblique-incidence resonant grating filter that covers the C band as an add-drop device for incident TE-polarized light. We tune the filter by tilting a microelectromechanical systems platform onto which the filter is attached. The fabrication tolerances as well as the role of finite incident-beam size and limited device size were addressed. The maximum achievable...