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1. WO1995006272 - MODULATEUR DE LUMIERE ASYMETRIQUE ET HYBRIDE A PUITS QUANTIQUES DE FABRY-PEROT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A hybridized, opto-electronic, asymmetric Fabry-Perot cavity spatial light modulator comprising:
a substrate that is transparent to light having a predetermined wavelength;
a first electrical contact layer disposed on one side of the substrate comprising a plurality of dielectric layers which cooperatively produce a first predetermined reflectivity at the predetermined wavelength;
a plurality of optical modulators arranged in a pixel format disposed on the first electrical contact layer, e h optical modulator comprising a plurality of quantum w 1 mc ulator layers having a predetermined thickness and an abs iion due tc heavy-hole excitons that is maximal at the ^redetermineα wavelength when a predetermined voltage is applied to the optical modulator;
a plurality of spacer layers, each spacer layer being disposed on a respective optical modulator, the thickness of each spacer layer being selectively reduced to tune a resonance wavelength of an optical cavity comprising the respective modulator and layers into substantial
coincidence with the predetermined wavelength;
ε plurality of second contact layers, each second contact layer being disposed on a respective optical modulator and having a second predetermined reflectivity at the predetermined wavelength, wherein the second predetermined reflectivity is different from the first predetermined reflectivity; and
a plurality of electronic means for applying a predetermined bias voltage to the optical modulators, wherein the electronic means are disposed on a separate substrate and electrically connected to the optical modulators on a pixel-by-pixel basis by a set of metallic bump bonds.

2. The modulator of claim 1, wherein the bias voltage varies the wavelengths of maximal absorption of the optical modulators with respect to the predetermined wavelength whereby at least one of the intensity and phase of coherent light passing through the substrate and optical modulators is continuously variable by a
predetermined amount.

3. The modulator of claim 1, wherein the substrate is removed through mechanical polishing and/or etching, and is replaced by a second substrate that is a different material and that is transparent to the predetermined wavelength.

4. The modulator of claim 1, wherein the optical modulators are addressed via optical detection layers that are grown into the optical modulators and are sensitive to a second predetermined wavelength that is different from the first predetermined wavelength, whereby individual optical modulators can be controlled by an optical signal incident on the respective optical detection layers.

5. The modulator of claim 1, wherein the electronic means are selectively interconnected to distribute
electrical signals applied to each pixel.

6. The modulator of claim 5, wherein the electronic means are selectively interconnected to distribute
electrical signals applied to each pixel in one of a random access format, a frame-by-frame display format, and a sequential column-by-column scrolling format.