Ultra-high multiplex analytical systems and methods
Apparatus, systems and methods for use in analyzing discrete reactions at ultra high multiplex with reduced optical noise, and increased system flexibility. Apparatus include substrates having integrated optical components that increase multiplex capability by one or more of increasing density of reaction regions, improving transmission of light to or collection of light from discrete reactions regions. Integrated optical components include reflective optical elements which re-direct illumination light and light emitted from the discrete regions to more efficiently collect emitted light. Particularly preferred applications include single molecule reaction analysis, such as polymerase mediated template dependent nucleic acid synthesis and sequence determination.
1. A system for measuring molecular events in an array of zero-mode-waveguides comprising:
a) an array of zero-mode-waveguides disposed on a top surface of a transparent substrate having a top surface and a bottom surface, wherein the transparent substrate comprises an array of micromirrors that redirect light to the zero-mode-waveguides, wherein each micromirror comprises a feature having a top and sides, wherein the tops and sides of the features each comprise a reflective coating; and
b) an illumination system that provides illumination beams to the zero-mode-waveguides through the bottom surface of the transparent substrate;
wherein the system is configured such that the micromirrors interact with the illumination beams such that the illumination beams undergo constructive interference, whereby the intensity of light at the zero-mode-waveguide is increased relative to other illuminated regions.
2. The system of claim 1 wherein the micromirrors comprise parabolas, cones, pyramids, truncated cones.
3. The system of claim 1 wherein the micromirrors comprise truncated cones.
4. The system of claim 1 wherein the micromirrors comprise truncated cones having tops with diameters between about 0.5 microns and about 5 microns.
5. The system of claim 1 wherein the micromirrors comprise truncated cones having tops with diameters between about 1.5 microns and about 4 microns.
6. The system of claim 1 wherein the micromirrors comprise truncated cones having tops with diameters between about 2 microns and about 3 microns.
7. The system of claim 1 wherein the micromirrors comprise truncated cones having sidewall angles of between 5° and 40° from vertical.
8. The system of claim 1 wherein the micromirrors comprise truncated cones having sidewall angles of between 10° and 30° from vertical.