of the sample support in which the upper surface of the detection element 500 coincides with the upper surface of the base 501 as a fabrication method it is only necessary to separately produce the detection element 500 and the base 501 providing a concave portion to a transparent member such as glass or plastic for the base 501 and fitting the detection element 500 thereinto if one of the detection element 500 and the base 501 projects from the other optical plane grinding by polishing or the like may be performed the base 501 and the detection element 500 are fixed to each other with an adhesive a double stick tape a mechanical fitting or the like alternatively the base 501 and the detection element 500 may be bonded to each other by chemical bonding alternatively optical grinding may be performed until the detection element is exposed to the surface of the sample support after producing the detection element 500 and the base 501 while fitting the detection element 500 thereinto from the beginning if it is possible to use a significantly large detection element the entire surface of the sample support may be configured as the detection element as illustrated in fig5 a that is the detection element itself may be used as the sample.