根据器件功能设计的需要，可以连续生长两个以上多层异质结。这种多结光电子器件可以是二端工作的,也可以是三端或多端的。AlGaAs/GaAsPNPN负阻激光器就是一种多结二端器件，它是将普通的PNPN闸流管和双异质激光器组合成一体的复合功能器件。为了兼顾电学上的全导通和激光器低阈值要求，通常制成NpPpnP结构。其中大写字母表示宽带隙材料，小写字母表示窄带隙材料。这种负阻激光器适用于光电自动控制方面。

    光晶体管是一种多层双结三端器件，它也是一种有内部电流增益的光电探测器。它不受碰撞电离噪声的限制，因此在长波长低噪声探测器应用方面可与半导体雪崩光电二极管相媲美。

    ***典型的多结器件是量子阱激光器。量子阱激光器的有源区由多层超晶格材料构成，在超晶格结构中窄带隙材料形成极薄二维电子(或空穴,或二者兼有)势阱,导带中的准连续的电子态变成量子化，电子空穴的复合发光发生在这些量子化的分立状态之间，所以能在相当程度上克服半导体激光器能带工作的弱点。谱线变窄，温度系数变小，而且还可以通过注入电流密度的改变，对发射波长进行调谐。它将扩展半导体激光器的应用领域。

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