madmacmo
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All In One RGB Laser - In Near Future - Maybe
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Posted 05/01/2012 11:47 PDT in Ubergizmo.com
By Pradeep Chandrasekaran
Quantum Dots Used to Build RGB Laser
Quote:
. . a physicist from Brown University called Cuong Dang along with his team of researchers have managed to produce a single material that is capable of producing several different wavelengths and therefore different colors of laser light . . .
The innovation in essence is a full RGB laser and is constructed with nanoparticles called colloidal quantum dots (CQDs). CQDs are thin films that produce light via quantum excitations . . .
Dang coated the base of the CQDs which are usually made from a material called cadmium-selenium (CdSe) alloy with a second alloy that is not properly described in the papers. With the introduction of the second alloy, the electronic properties were altered and this resulted in light being created as the primary output . . .
To stimulate light emission, the researchers directed short pulses of laser onto the film which resulted in three different CQDs re-emitting the red, green and blue light wavelengths successfully. After applying a filter to remove most of the light from the original laser source, only the CQDs produced was left . . .
While this new development is not practical by itself for commercial use since it is just a laboratory prototype, it still has some refining to go through before it can make its way into devices like your Blue-ray player. Nevertheless, it is still a significant advance toward broad-spectrum lasers fabricated from a single material as opposed to using 3 separate lasers to achieve any color in the visible-light spectrum of colors.
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________________________________________
Posted 05/01/2012 11:47 PDT in Ubergizmo.com
By Pradeep Chandrasekaran
Quantum Dots Used to Build RGB Laser
Quote:
. . a physicist from Brown University called Cuong Dang along with his team of researchers have managed to produce a single material that is capable of producing several different wavelengths and therefore different colors of laser light . . .
The innovation in essence is a full RGB laser and is constructed with nanoparticles called colloidal quantum dots (CQDs). CQDs are thin films that produce light via quantum excitations . . .
Dang coated the base of the CQDs which are usually made from a material called cadmium-selenium (CdSe) alloy with a second alloy that is not properly described in the papers. With the introduction of the second alloy, the electronic properties were altered and this resulted in light being created as the primary output . . .
To stimulate light emission, the researchers directed short pulses of laser onto the film which resulted in three different CQDs re-emitting the red, green and blue light wavelengths successfully. After applying a filter to remove most of the light from the original laser source, only the CQDs produced was left . . .
While this new development is not practical by itself for commercial use since it is just a laboratory prototype, it still has some refining to go through before it can make its way into devices like your Blue-ray player. Nevertheless, it is still a significant advance toward broad-spectrum lasers fabricated from a single material as opposed to using 3 separate lasers to achieve any color in the visible-light spectrum of colors.
Attached Thumbnails
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