Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Mirise Technologies Corporation

Qd Laser, Inc.

Hitoshi Yamada

Koichi Oyama

Yuki Kamata

Yutaka Ohnishi

Kenichi Nishi

Keizo Takemasa

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.

Semiconductor device

Growing community of inventors

Nisshin, Japan

Hitoshi Yamada