Integrated light concentrator

An infrared sensor, including:

• a frame defining an opening;
• a membrane spanning the opening;
• an absorber disposed on the membrane for absorbing incident infrared power and heating in response thereto;
• the frame including four side walls defining a cavity adjacent one side of the membrane, each of the side walls having a reflecting surface disposed at an angle relative to the absorber for reflecting incident light toward the absorber.

An infrared sensor, including:

• an absorber for absorbing incident infrared power and heating in response thereto;
• a frame including four segments defining an opening, the absorber being disposed within the opening;
• and
• a plurality of thermocouples connected in series and extending between the absorber and the frame, each of the thermocouples having a Seebeck voltage which depends upon the temperature difference between the frame and the absorber;
• wherein each of the four segments include a reflecting surface disposed at an angle relative to the absorber for reflecting incident infrared power toward the absorber, the reflecting surfaces collectively defining the sides of a light concentrating cavity.