Light emitting device, light source system including the light emitting device, and optical coherence tomography including the light source system
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United States of America Patent
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Mar 27, 2018
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Mar 25, 2015
filing date -
Mar 27, 2014
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Abstract
The present invention provides a light emitting device which emit light having a high-order level without increasing a current injection density to an active layer. A light emitting device according to the present invention includes an upper electrode layer, a lower electrode layer, and an active layer provided between them. In this case, light is emitted by injection of electric current to the active layer through the upper electrode layer and the lower electrode layer, the active layer has a plurality of quantum-confined structures, and a first quantum-confined structure has a ground level having an energy level E0 and a high-order level having an energy level E1, and a second quantum-confined structure has an energy level E2 which is higher than the E0, and the E1 and the E2 are substantially matched.
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