Optical detector

An optical detector comprising:

• a stacked structure including
• a first substrate in which a plurality of wells are formed,
• a second substrate in which a plurality of heating means are provided in alignment with the plurality of wells to heat the wells, each well corresponding to a different one of the heating means,
• a third substrate in which a plurality of photoirradiation means are provided in alignment with the wells and the heating means, each well corresponding to a different one of the photoirradiation means,
• a fourth substrate in which a plurality of photodetection means are provided in alignment with the wells, the heating means, and the photoirradiation means, such that the heating means are not included in the same substrate as the photodetection means, and
• a constant-temperature Peltier device formed on the fourth substrate,
• wherein the third substrate, the second substrate, the first substrate, the fourth substrate and the Peltier device are formed in that order, and
• wherein the first through fourth substrates are arranged adjacent to one another as separate layers to form said stacked structure such that each of the corresponding wells, heating means, photoirradiation means and photodetection means are aligned with one another in a thickness direction of the stacked structure, and
• wherein the heating means include transparent electrodes patterned in the second substrate.