| abstract |
The invention discloses a three-dimensional dirac semi-metal material-based infrared saturable absorption device. A three-dimensional dirac semi-metal material with a zero band gap and a linear energy dispersion relation is utilized as a saturable absorption layer; an operating wavelength covers an infrared region; and a plurality of parameters have high adjustability. The three-dimensional dirac semi-metal material-based infrared saturable absorption device comprises the saturable absorption layer and an optical element, wherein the saturable absorption layer is formed by a three-dimensional dirac semi-metal material; and the optical element is required for bearing the saturable absorption layer; a reflective saturable absorption device comprises a functional layer (1), an optical substrate (2), the saturable absorption layer (3) and a reflecting layer (4) from top to bottom; a transmission type saturable absorption device comprises the functional layer (1), the optical substrate (2) an the saturable absorption layer (3); and the operating wavelength covers the infrared region. An infrared Q-switched and mode-locked laser device of the three-dimensional dirac semi-metal material-based saturable absorption device has the advantages of high stability, tunable operating wavelength, high output power and the like. |