Terahertz wave detection device, terahertz wavelength filter, imaging device, and measurement device

A terahertz wavelength filter transmitting terahertz waves having a predetermined wavelength, comprising:

• a metal layer having a plurality of holes communicating with an incident surface onto which the terahertz waves are incident and an emission surface from which the terahertz waves having the predetermined wavelength are emitted;
• and
• a dielectric portion filling in the plurality of holes and made of a dielectric,
• wherein the plurality of holes are formed with a predetermined pitch along a direction that is perpendicular to a normal line of the incident surface.

An imaging device comprising:

• a terahertz wave generation device generating terahertz waves;
• a terahertz wave detection device detecting the terahertz waves that are emitted from the terahertz wave generation device and penetrate or are reflected from an object;
• and
• an image generation unit generating an image of the object based on the result of the detection performed by the terahertz wave detection device,
• wherein the terahertz wave detection device includes:
• a wavelength filter transmitting terahertz waves having a predetermined wavelength;
• and
• a detection portion detecting the terahertz waves having the predetermined wavelength that have passed through the wavelength filter by converting the terahertz waves into heat,
• wherein the wavelength filter includes:
• a metal layer having a plurality of holes communicating with an incident surface onto which the terahertz waves that are emitted from the terahertz wave generation device are incident and an emission surface from which the terahertz waves having the predetermined wavelength are emitted;
• and
• a dielectric portion filling in the plurality of holes and made of a dielectric, and
• wherein the plurality of holes are formed with a predetermined pitch along a direction that is perpendicular to a normal line of the incident surface.

A measurement device comprising:

• a terahertz wave generation device generating terahertz waves;
• a terahertz wave detection device detecting the terahertz waves that are emitted from the terahertz wave generation device and penetrate or are reflected from an object;
• and
• a measurement unit measuring the object based on the result of the detection performed by the terahertz wave detection device,
• wherein the terahertz wave detection device includes:
• a wavelength filter transmitting terahertz waves having a predetermined wavelength;
• and
• a detection portion detecting the terahertz waves having the predetermined wavelength that have passed through the wavelength filter by converting the terahertz waves into heat,
• wherein the wavelength filter includes:
• a metal layer having a plurality of holes communicating with an incident surface onto which the terahertz waves that are emitted from the terahertz wave generation device are incident and an emission surface from which the terahertz waves having the predetermined wavelength are emitted;
• and
• a dielectric portion filling in the plurality of holes and made of a dielectric, and
• wherein the plurality of holes are formed with a predetermined pitch along a direction that is perpendicular to a normal line of the incident surface.