Diffraction grating-based encoded micro-particles for multiplexed experiments
First Claim
1. An optical identification element having a chemical attached thereto, comprising:
- a substrate;
at least a portion of said substrate being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; and
said grating providing an output optical signal indicative of a code when illuminated by an incident light signal propagating from outside the substrate, said output optical signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light signal; and
the chemical being attached to at least a portion of said substrate.
5 Assignments
0 Petitions
Accused Products
Abstract
Microparticles 8 includes an optical substrate 10 having at least one diffraction grating 12 disposed therein. The grating 12 having a plurality of colocated pitches Λ which represent a unique identification digital code that is detected when illuminated by incident light 24. The incident light 24 may be directed transversely from the side of the substrate 10 with a narrow band (single wavelength) or multiple wavelength source, in which case the code is represented by a spatial distribution of light or a wavelength spectrum, respectively. The code may be digital binary or may be other numerical bases. The micro-particles 8 can provide a large number of unique codes, e.g., greater than 67 million codes, and can withstand harsh environments. The micro-particles 8 are functionalized by coating them with a material/substance of interest, which are then used to perform multiplexed experiments involving chemical processes, e.g., DNA testing and combinatorial chemistry.
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Citations
136 Claims
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1. An optical identification element having a chemical attached thereto, comprising:
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a substrate; at least a portion of said substrate being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; and said grating providing an output optical signal indicative of a code when illuminated by an incident light signal propagating from outside the substrate, said output optical signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light signal; and the chemical being attached to at least a portion of said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An encoded particle having a chemical attached thereto, comprising:
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a particle; at least a portion of said particle being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; and said grating providing an output optical signal indicative of a code when illuminated by an incident light signal propagating from outside the substrate, said output optical signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light signal; and the chemical being attached to at least a portion of said particle. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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76. A method of reading an encoded optical identification element having a chemical attached thereto, comprising:
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obtaining a substrate, at least a portion of which being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; attaching the chemical to at least a portion of said substrate; illuminating said substrate with incident light, said substrate providing an output optical signal indicative of a code, said output optical signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light; and reading said output light signal and detecting said code therefrom. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95)
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96. A method of reading an encoded particle having a chemical attached thereto, comprising:
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obtaining a particle, at least a portion of which being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; attaching the chemical to at least a portion of said particle; illuminating said particle with incident light, said particle providing an output optical signal indicative of a code, said output signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light; and reading said output light signal and detecting said code therefrom. - View Dependent Claims (97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115)
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116. A method of performing a multiplexed particle assay, comprising:
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obtaining a plurality of particles each being made of a substantially single material and having at least one diffraction grating embedded therein, said grating having a resultant refractive index variation within the substantially single material at a grating location; attaching at least one probe to at least one of said particles, thereby providing functionalized particles; placing said functionalized particles in contact with at least one analyte, said analyte having a corresponding label disposed thereon; illuminating said particles with a first and second incident light, said particle providing a first output optical signal responsive to said first incident light indicative of a code and a second output optical signal responsive to said second incident light indicative of said label, said first output optical signal being a result of passive, non-resonant scattering from said grating when illuminated by said incident light; reading said first output optical signal and detecting said code therefrom; and reading said second output optical signal and detecting said label therefrom. - View Dependent Claims (117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136)
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Specification