Detecting apparatus, and detecting method

A device comprising:

• a transmission line including a substrate having a hole and a conductor provided on the substrate for transmitting an electromagnetic wave in a frequency range between 30 GHz and 30 THz;
• and
• an infiltrative holding member provided in the hole for infiltration and holding of a liquid object;
• wherein the conductor is provided on the infiltrative holding member.

A detecting apparatus for detecting information of a liquid object, the detecting apparatus comprising:

• a substrate;
• a transmission line;
• an electromagnetic-wave supplying unit for supplying an electromagnetic wave in a frequency range between 30 GHz and 30 THz to the transmission line;
• an electromagnetic-wave detecting unit for detecting the electromagnetic wave transmitted through the transmission line;
• an infiltrative holding member provided on the transmission line for infiltration and holding of the liquid object;
• and
• a non-infiltrative member which is incapable of infiltrating the liquid object,
• wherein the infiltrative holding member is set at a location containing at least a portion in which an electric field distribution of the electromagnetic wave propagating along the transmission line extends,
• wherein the non-infiltrative member is set partly or entirely surrounding the infiltrative holding member,
• wherein the transmission line is a microstrip line made of a metal, and
• wherein an optical constant of the non-infiltrative member for the THz wave transmitted through the transmission line is approximately equal to that of the infiltrative holding member.