Semiconductor device
Number of patents in Portfolio can not be more than 2000
United States of America
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Nov 19, 2024
Grant Date -
Oct 12, 2023
app pub date -
Mar 31, 2023
filing date -
Mar 31, 2023
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Abstract
In a semiconductor device, a quantum dot group includes a stack of plural quantum dot layers having different central wavelengths at which respective gains are maximum. A part of or all of the quantum dot layers are stacked so that the central wavelengths sequentially shifts along a stacking direction. The quantum dot group includes a longest wavelength layer group composed of some quantum dot layers including a longest wavelength layer having a longest central wavelength and at least one quantum dot layer stacked on the longest wavelength layer. The longest wavelength layer or the longest wavelength layer group has a larger gain at the central wavelength than the gain at the central wavelength of each of the other quantum dot layers.
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