Methods and systems for forming optical modulators using micro-contact lithography
View Patent ↗Optical modulators, one or more components of various optical modulators, and methods of forming optical modulators and/or one or more components are disclosed. A substrate may be provided and a precursor material may be applied to the substrate with a micro-contact printing stamp. The precursor material may be cured on the substrate and the waveguide may be formed into a micro-ring resonator. The micro-contact printing stamp may be configured to create a waveguide on the substrate.
1. A method of forming an optical apparatus, the method comprising:
providing a substrate;
applying a first precursor material to the substrate with a first micro-contact printing stamp, wherein the first micro-contact printing stamp is configured to apply the first precursor material in the form of a first micro-ring waveguide on the substrate;
curing the first precursor material on the substrate to form the first micro-ring waveguide;
providing a source waveguide in optical communication with the first micro-ring waveguide, wherein providing the source waveguide comprises coupling the source waveguide to the first micro-ring waveguide and configuring the source waveguide to carry an input signal to the first micro-ring waveguide; and
providing a first drain waveguide in optical communication with the first micro-ring waveguide; wherein the drain wavequide comprises at least one branched drain wavequide configured to isolate a wavelength corresponding to the input signal.
2. The method of claim 1 , wherein applying the first precursor material comprises applying one or more of:
a semiconductor material having at least one active portion that generates electromagnetic radiation; and
a light outcoupling substance.
3. The method of claim 1 , wherein applying the first precursor material comprises applying one or more of a sol-gel material, a hydrocarbon polymer, a fluorinated polymer, and a silicon containing polymer.
4. The method of claim 1 , wherein applying the first precursor material comprises selecting a micro-contact printing stamp with an internal radius in a range of about 5 μm to about 1000 μm.
5. The method of claim 1 , wherein applying the first precursor material comprises selecting a micro-contact printing stamp having an internal radius based upon a wavelength to be isolated by the first micro-ring waveguide, wherein the wavelength is defined by mλ=2πnR, where m is the propagation mode number, n is the index of refraction of the first precursor material, and R is the internal radius of the first micro-ring waveguide.
6. The method of claim 1 , wherein curing the first precursor material comprises curing by one or more of a thermal cure, a photoinitiation cure, and a chemical catalyst initiation cure.
7. The method of claim 1 , wherein applying the first precursor material to the substrate with the first micro-contact printing stamp comprises applying with a micro-contact printing stamp comprising one or more silicone polymers or one or more elastomeric polymers.
8. The method of claim 1 , further comprising integrating the optical apparatus with a microelectronic chip.
9. The method of claim 1 , wherein applying the first precursor material to the substrate comprises applying to either a flexible substrate or a rigid substrate.
10. The method of claim 1 , further comprising applying a second precursor material on to the first precursor material with a second micro-contact printing stamp.
11. The method of claim 10 , wherein applying the second precursor material comprises applying a second precursor material having a lower refractive index than the first precursor material.
12. The method of claim 1 , wherein applying the first precursor material to the substrate further comprises applying one or more of the source waveguide and the drain waveguide to the substrate with the first micro-contact printing stamp.
13. The method of claim 1 , wherein providing the drain waveguide comprising coupling the drain waveguide to the first micro-ring waveguide and configuring the drain waveguide to carry an output signal from the first micro-ring waveguide.
14. The method of claim 1 , wherein curing the first precursor material on the substrate to form the first micro-ring waveguide comprises curing the first precursor material to form a core of the first micro-ring waveguide.
15. The method of claim 14 , further comprising:
applying a second precursor material to the core with a second micro-contact printing stamp; and
curing the second precursor material to form a cladding of the first micro-ring waveguide.
16. The method of claim 1 , further comprising:
providing a second drain waveguide;
applying the first precursor material to the substrate with a third micro-contact printing stamp, wherein the third micro-contact printing stamp is configured to apply the first precursor material to the substrate in the form of a second micro-ring waveguide, wherein a radius of the second micro-ring waveguide is different from a radius of the first micro-ring waveguide;
curing the first precursor material to form the second micro-ring waveguide, wherein a characteristic frequency of the second micro-ring waveguide and the first micro-ring waveguide are different; and
optically coupling the source and second drain waveguides to the second micro-ring waveguide.