Target substance capturing device
A target substance capturing device includes a reflection surface on which a plurality of non-flat portions is arrayed, the reflection surface capturing a target substance, and reflecting irradiated light. The plurality of non-flat portions are arranged in an array, the array includes a plurality of unit arrays in which the plurality of non-flat portions are arranged such that each one center of the non-flat portions superposes a position of a vertex in an M-time symmetrical figure, and the plurality of unit arrays is arranged such that each one center of gravity of the M-time symmetrical figure superposes a position of an intersection of an N-time symmetrical lattice pattern, where M is an integer of two or more, and N is an integer of two or more and different from M.
1. A target substance capturing device that captures a target substance with a biosensor using a photonic crystal including a reflection surface that reflects irradiated light, and having a plurality of non-flat portions arrayed on the reflection surface, wherein
each of the non-flat portions belongs to one of a plurality of unit arrays in which the non-flat portions are arranged such that a center of each of the non-flat portions superposes a position of a vertex of a regular triangle, each unit array of the unit arrays being a respective unit triangle of a plurality of unit triangles, the plurality of unit triangles forming a lattice pattern, the unit arrays are arranged in such a manner that:
the non-flat portions belonging to the one of the unit arrays are different from the non-flat portions belonging to the unit arrays adjacent to the one of the unit arrays;
each unit triangle has a g-center that is a center of gravity that superposes an intersection of the lattice pattern, the lattices intersecting with each other at an angle of 60°;
the lattice pattern has a lattice cycle of a distance that is a distance between the g-centers adjacent each other;
the non-flat portions are not arranged in flat-center positions, each of which is a center of gravity of a triangle that is made by connecting the g-centers of adjacent three of the unit triangles having sides that are parallel to straight lines included in the lattice pattern;
each of the flat-center positions are adjacent to and surrounded by three pairs of the non-flat portions, each pair of the three pairs of non-flat portions belonging to a respective one of the unit arrays; and
the non-flat portions are arranged in at least two pairs of adjacent rows on the reflection surface, each pair of the adjacent rows comprising a first row and a second row, wherein the second row has two times as many of the non-flat portions as the first row.
2. The target substance capturing device according to claim 1 , wherein a cross section of the non-flat portion along the reflection surface is a circle, and a c-diameter that is a diameter of the cross section of the non-flat portion is one times or less a c-distance that is a length between centers of the non-flat portions belonging to the unit triangle of one of the unit arrays.
3. The target substance capturing device according to claim 1 , wherein a cross section of the non-flat portion along the reflection surface is a regular hexagon or a star shape.
4. The target substance capturing device according to claim 2 , wherein:
the c-diameter is 0.25 times or less the lattice cycle and,
the c-diameter is in a range from 50 nm to 1000 nm,
the c-distance is in a range from 100 nm to 2000 nm.
5. The target substance capturing device according to claim 4 ,
the c-diameter is in a range from 100 nm to 500 nm.
6. The target substance capturing device according to claim 4 , the c-distance is in a range from 200 nm to 1000 nm.
7. The target substance capturing device according to claim 1 , wherein
for at least one of the first rows of the non-flat portions, a respective one of the flat-center positions is arranged directly between each of the non-flat portions in the first row.