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    • 10. 发明公开
    • Quantum dot semiconductor device
    • Quantenpunkthalbleitervorrichtung
    • EP1976076A2
    • 2008-10-01
    • EP08152938.0
    • 2008-03-18
    • Fujitsu Ltd.The University of Tokyo
    • Ebe, HirojiKawaguchi, KenichiMorito, KenArakawa, Yasuhiko
    • H01S5/34H01S5/50
    • H01S5/341B82Y20/00H01S5/3086H01S5/309H01S5/3412H01S5/5009H01S2301/04Y10S438/962
    • Aquantumdot semiconductor device is disclosedwhich prevents variation of the gain in an operation wavelength even if the temperature varies. The quantum dot semiconductor device includes an active layer (11) having a plurality of quantum dot layers (4A, 4B) each including a composite quantum dot (2) formed by stacking a plurality of quantum dots (1) and a side barrier layer (3) formed in contact with a side face of the composite quantum dot (2). The stack number of the quantum dots (1) and the magnitude of strain of the side barrier layer (3) from which each of the quantum dot layers (4A, 4B) is formed is set so that a gain spectrum of the active layer (11) has a flat gain bandwidth corresponding to a shift amount of the gain spectrum within a desired operation temperature range.
    • 公开了一种即使在温度变化的情况下也能够防止工作波长的增益变动的散热半导体装置。 量子点半导体器件包括具有多个量子点层(4A,4B)的有源层(11),每个量子点层包括通过堆叠多个量子点(1)和侧面阻挡层(1)形成的复合量子点(2) 3)与复合量子点(2)的侧面接触形成。 形成量子点(1)的堆叠数量和形成每个量子点层(4A,4B)的侧面阻挡层(3)的应变幅度被设定为使得活性层( 11)具有对应于期望的操作温度范围内的增益谱的偏移量的平坦增益带宽。