Surface wave assisted structures and systems
A surface wave assisted system having an aperture layer with a surface and an aperture, and a plurality of grooves around the aperture. The plurality of grooves is configured to generate an optical transfer function at the aperture by inducing a surface wave for interfering with transmission of light of a range of spatial frequency.
1. A surface wave assisted system comprising:
an aperture layer having a surface and an aperture; and
a plurality of grooves around the aperture, the plurality of grooves configured to generate an optical transfer function at the aperture by inducing a surface wave for destructively interfering with transmission of light of a range of spatial frequency at the aperture; and
a light detector layer, wherein the aperture layer is disposed on the light detector layer.
2. The surface wave assisted system of claim 1 , wherein the plurality of grooves is defined in the surface of the aperture layer.
3. The surface wave assisted system of claim 1 , wherein the plurality of grooves is defined in a transparent layer disposed on the aperture layer.
4. The surface wave assisted system of claim 1 ,
wherein the plurality of grooves comprises an innermost groove and an outermost groove, and
wherein the optical transfer function is associated with a distance between the innermost groove and the outermost groove.
5. The surface wave assisted system of claim 1 , wherein the optical transfer function is a notch filter.
6. The surface wave assisted system of claim 1 , wherein the optical transfer function is a highpass filter.
7. The surface wave assisted structure of claim 1 , wherein the optical transfer function is a lowpass filter.
8. The surface wave assisted system of claim 1 ,
further comprising a simple aperture in the surface;
wherein the plurality of grooves is further configured to generate a high gradient of transmission at normal incidence; and
wherein the light detector layer is configured to detect a wavefront based on a measured intensity of light transmitted through the aperture normalized by a measured intensity of light through the simple aperture.
9. The surface wave assisted system of claim 1 , wherein the plurality of grooves has a gradually changing period to destructively interfere with light having a broad range of wavelengths.
10. A surface wave assisted polarization sensor comprising:
an aperture layer having a surface and an aperture;
a first and second pluralities of linear grooves located on opposite sides of the aperture and configured to induce a surface wave for destructively interfering with transmission through the aperture of light of a polarization angle; and
a light detector configured to detect the polarization angle by measuring intensity of light transmitted through the aperture, wherein the aperture layer is disposed on the light detector.
11. The surface wave assisted polarization sensor of claim 10 , wherein the first and second pluralities of grooves are defined in the surface of the aperture layer.
12. The surface wave assisted polarization sensor of claim 10 , wherein the first and second pluralities of grooves are defined in a transparent layer separate from the aperture layer.
13. A surface wave assisted system for spectral imaging, comprising:
a grating structure configured to induce a surface wave for increasing intensity of light of a wavelength transmitted through the grating structure; and
a light detecting element configured to receive light transmitted through the grating structure and detect the increased intensity of the light of the wavelength, wherein the grating structure is disposed over the light detecting element.
14. A surface wave assisted darkfield aperture system comprising:
an aperture layer having a surface and an aperture; and
a plurality of grooves around the aperture, the plurality of grooves configured to generate a darkfield at the aperture by inducing a surface wave for destructively interfering with direct transmission of a uniform incident light field received by the aperture;
a light detector adapted to detect light passing through the aperture, wherein the aperture layer is disposed on the light detector.
15. The surface wave assisted darkfield aperture system of claim 14 , wherein the plurality of grooves is further configured to constructively interfere with transmission of a non-uniform light field received by the aperture.
16. The surface wave assisted darkfield aperture system of claim 14 , wherein the plurality of grooves is defined in the surface of the aperture layer.
17. The surface wave assisted darkfield aperture system of claim 14 , wherein the plurality of grooves is in a transparent layer separate from the aperture layer.
18. The surface wave assisted darkfield aperture system of claim 14 , further comprising a light detector adapted to detect light passing through the aperture.
19. A broadband surface wave aperture system comprising:
an aperture layer having a surface and an aperture;
a first plurality of grooves around the aperture, the first plurality of grooves configured to induce a first surface wave configured to destructively interfere with light of a first range of wavelengths;
a second plurality of grooves around the aperture, the second plurality of grooves configured to induce a second surface wave configured to destructively interfere with light of a second range of wavelengths different from the first range of wavelengths; and
a light detector, wherein the aperture layer is disposed on the light detector layer.
20. The broadband surface wave aperture system of claim 19 ,
wherein the first plurality of grooves has a first periodicity configured to destructively interfere with light of the first range of wavelengths, and
wherein the second plurality of grooves has a second periodicity different from the first periodicity, the second periodicity configured to destructively interfere with light of the second range of wavelengths.
21. The surface wave assisted darkfield aperture system of claim 14 , wherein the plurality of grooves is further configured to constructively interfere with transmission of a non-uniform light field received by the aperture.