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    • 7. 发明申请
    • OPTICAL DEVICE INCLUDING MULTILAYER REFLECTOR AND VERTICAL CAVITY SURFACE EMITTING LASER
    • 包括多层反射器和垂直孔表面发射激光的光学器件
    • US20080049329A1
    • 2008-02-28
    • US11782221
    • 2007-07-24
    • Tetsuya TAKEUCHI
    • Tetsuya TAKEUCHI
    • G02B5/28
    • H01S5/18369B82Y20/00H01L33/105H01S5/10H01S5/18358H01S5/3201H01S5/34306H01S5/34333H01S5/3436
    • Provided are an optical device including a multilayer reflector having a layer whose optical thickness is not λ/4, and a vertical cavity surface emitting laser using the optical device. A resonance frequency shift or a reduction in reflectivity which is caused by a deviation from an optical thickness of λ/4 can be suppressed to improve characteristics and yield. The optical device for generating light of a wavelength λ includes a reflector and an active layer. The reflector is a semiconductor multilayer reflector including a first layer and a second layer which are alternatively laminated and have different refractive indices. The first layer has an optical thickness smaller than λ/4. The second layer has an optical thickness larger than λ/4. The interface between the first layer and the second layer is located at neither a node nor an antinode of an optical intensity distribution within the reflector.
    • 提供了包括具有光学厚度不是λ/ 4的层的多层反射器的光学器件和使用该光学器件的垂直腔表面发射激光器。 可以抑制由与λ/ 4的光学厚度的偏差引起的共振频率偏移或反射率的降低,从而改善特性和产率。 用于产生波长λ的光的光学装置包括反射器和有源层。 反射器是包括交替层叠并具有不同折射率的第一层和第二层的半导体多层反射器。 第一层的光学厚度小于λ/ 4。 第二层的光学厚度大于λ/ 4。 第一层和第二层之间的界面不在反射器内的光强度分布的节点和波腹处。