Electromagnetic wave detector and gas analysis device having dual electromagnetic wave sensors for detecting one of light in a predetermined wavelength band and predetermined polarization

An electromagnetic wave detector comprising:

• a substrate;
• a first electromagnetic wave sensor configured to include a light reception unit which is held in midair above the substrate by a support leg;
• and
• a second electromagnetic wave sensor configured to include a light reception unit which is held in midair above the substrate by a support leg that has a structure identical to a structure of the support leg of the first electromagnetic wave detector, the second electromagnetic wave sensor being provided to be adjacent to the first electromagnetic wave sensor, wherein
• the light reception unit of the first electromagnetic wave sensor is formed on the same plane as the support leg and includes a flat reflective film which covers an entire surface of the light reception unit,
• the light reception unit of the second electromagnetic wave sensor is formed on the same plane as the support leg and includes an electromagnetic wave absorption body which detects one of light in a predetermined wavelength band and light of a predetermined polarization,
• the first electromagnetic wave sensor includes the light reception unit comprising the reflective film and the support leg which the electromagnetic wave enters directly, and has the same output as the sensor output caused by the electromagnetic wave absorbed in the area other than the light reception unit of the second electromagnetic wave sensor and
• a difference between output of the second electromagnetic wave sensor and output of the first electromagnetic wave sensor is output.