Methods and devices for colloidal suspension filters

A liquid filter system comprising:

• a housing;
• a first plurality of silicon nanoclusters in a colloidal suspension, wherein the first plurality of silicon nanoclusters in the colloidal suspension are disposed in the housing, wherein the first plurality of silicon nanoclusters in the colloidal suspension have a first oxygen level, and wherein the first plurality of silicon nanoclusters in the colloidal suspension absorbs energy at a first wavelength and transmits energy at a second wavelength;
• and
• wherein the housing comprises an inlet and an outlet, the housing permits a passage of a laser beam generated by a laser generator, wherein the plurality of silicon nanoclusters in the colloidal suspension are configured to filter the laser beam, and wherein the housing circulates the colloidal suspension to dissipate heat released from the laser beam.

A method for controlling a wavelength of a laser beam comprising:

• providing a transmissive housing comprising a first plurality of amorphous silicon nanoclusters in a colloidal suspension, the first plurality of amorphous silicon nanoclusters having a first level of oxygen, the first plurality of amorphous silicon nanoclusters absorbing at a first wavelength and emitting at a second wavelength;
• providing a second plurality of amorphous silicon nanoclusters into the colloidal suspension to adjust the absorption at the first wavelength and the emission at the second wavelength, the second plurality of amorphous silicon nanoclusters having a second level of oxygen, wherein the first level of oxygen and the second level of oxygen are different;
• and
• circulating the first plurality of amorphous silicon nanoclusters and the second plurality of amorphous silicon nanoclusters through the transmissive housing to dissipate heat.