Laser device and method of achieving optical gain with colloidal quantum fountains
AssigneeUchicago Argonne, LLC
InventorBenjamin Diroll
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Abstract
Optical gain mediums are required for lasing devices and high intensity optical systems across a wide range of applications. A method for achieving optical gain includes an optical gain medium having colloidal quantum fountains includes providing pump radiation to the gain medium. The electrons of the colloidal quantum fountains are promoted from a valence band to an excited state in a conduction band of the colloidal quantum fountains. Seed radiation is provided to the gain medium and electrons of the quantum fountains are de-excited by the seed radiation through stimulated emission from the excited state to a lower energy state of the conduction band, thereby providing optical gain.
Claims7
A lasing device comprising:
- a gain medium disposed in a resonant optical cavity, the gain medium having a plurality of colloidal nanoplates, with the colloidal nanoplates having a (i) valence energy band, (ii) first excited conduction energy band, (iii) second excited conduction energy band, and (iv) a charge carrier in the valence energy band;
- a pump radiation source disposed to provide pump radiation to the gain medium, the pump radiation having an energy configured to excite the charge carrier from the valence energy band to the second excited conduction energy band;
- and
- a seed radiation source disposed to provide seed radiation to the gain medium, the seed radiation source configured to cause de-excitation of the charge carrier from the second excited conduction energy band, to the first excited conduction energy band and inducing stimulated emission of output radiation.
Dependencies are inferred from the claim text.