Narrow-band resonant grating waveguide filters constructed with azobenzene polymers.

Resonant grating waveguide structures were used to fabricate narrow-bandwidth optical filters. Azopolymer films were deposited on top of slab waveguides, and surface relief gratings were optically inscribed on them to be used as couplers. This technique is a simple one-step process and produces efficient gratings with high accuracy. Sharp resonant peaks are observed in the transmission and the reflection spectra of these structures. The thickness and the index of refraction of the waveguide can be accurately determined from these resonances by use of modal theory. These parameters are then used in the design of an optical filter. Bandwidths of less than 1 nm and a decrease in transmitted signal of 60% are reported. Measurement of these values was limited by the divergence of the probe beam.

[1]  S. Hvilsted,et al.  Atomic force and optical near‐field microscopic investigations of polarization holographic gratings in a liquid crystalline azobenzene side‐chain polyester , 1996 .

[2]  Jayant Kumar,et al.  Gradient force: The mechanism for surface relief grating formation in azobenzene functionalized polymers , 1998 .

[3]  C. Callender,et al.  Guided mode resonance filters using polymer films , 1997 .

[4]  A. A. Friesem,et al.  Narrow spectral bandwidths with grating waveguide structures , 1996 .

[5]  C. Barrett,et al.  Molecular Addressing? Selective Photoinduced Cooperative Motion of Polar Ester Groups in Copolymers Containing Azobenzene Groups , 1998 .

[6]  P. Rochon,et al.  Azo Polymers for Reversible Optical Storage. 9. Copolymers Containing Two Types of Azobenzene Side Groups , 1996 .

[7]  Paul Rochon,et al.  Mechanism of Optically Inscribed High-Efficiency Diffraction Gratings in Azo Polymer Films , 1996 .

[8]  Paul Rochon,et al.  Optically induced surface gratings on azoaromatic polymer films , 1995 .

[9]  Paul Rochon,et al.  Optically induced and erased birefringence and dichroism in azoaromatic polymers , 1992 .

[10]  U J Gibson,et al.  Simple versatile method for fabricating guided-wave gratings. , 1985, Applied optics.

[11]  P. Rochon,et al.  Azo polymers for reversible optical storage: 13. Photoorientation of rigid side groups containing two azo bonds , 1997 .

[12]  Paul Rochon,et al.  Optically inscribed surface relief diffraction gratings on azobenzene-containing polymers for coupling light into slab waveguides , 1996 .

[13]  T. Gaylord,et al.  Rigorous coupled-wave analysis of planar-grating diffraction , 1981 .

[14]  R. Magnusson,et al.  New principle for optical filters , 1992 .

[15]  K. Yokomori.  Dielectric surface-relief gratings with high diffraction efficiency. , 1984, Applied optics.

[16]  S. Hvilsted,et al.  Theoretical model of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters , 1998 .

[17]  S. S. Wang,et al.  Theory and applications of guided-mode resonance filters. , 1993, Applied optics.

[18]  E Garmire,et al.  Ion beam micromachining of integrated optics components. , 1973, Applied optics.

[19]  A. A. Oliner,et al.  A New Theory of Wood’s Anomalies on Optical Gratings , 1965 .

[20]  M. Nevière,et al.  Bragg–Fresnel multilayer gratings: electromagnetic theory , 1994 .

[21]  Paul Rochon,et al.  Azo Polymers for Reversible Optical Storage. 6. Poly[4-[2-(methacryloyloxy)ethyl]azobenzene] , 1995 .

[22]  Robert Magnusson,et al.  Guided-mode resonances in planar dielectric-layer diffraction gratings , 1990 .

[23]  L. Johnson,et al.  Generation of periodic surface corrugations. , 1978, Applied optics.

[24]  Jean-Michel Nunzi,et al.  Anisotropy of the photoinduced translation diffusion of azo-dyes , 1998 .

[25]  S. Xie,et al.  Azo polymers for reversible optical storage. 2. Poly[4'-[[2-(acryloyloxy)ethyl]ethylamino]-2-chloro-4-nitroazobenzene] , 1992 .

[26]  A. A. Friesem,et al.  Resonant grating–waveguide structures for visible and near-infrared radiation , 1997 .

[27]  J. Kumar,et al.  Laser‐induced holographic surface relief gratings on nonlinear optical polymer films , 1995 .