Patent ID: 8803176
Filing Date: 2014-08-12
Classification: H01L,Y02E

Abstract:
1. A semiconductor structure comprising: a source layer comprising a first semiconductor layer, an active layer, and a second semiconductor layer stacked in sequence; a third optical symmetric layer disposed on and contacting a surface of the second semiconductor layer away from the first semiconductor layer, wherein a refractive index of the third optical symmetric layer is in a range from about 1.2 to about 1.5; a metallic layer disposed on and contacting a surface of the third optical symmetric layer away from the first semiconductor layer; a fourth optical symmetric layer disposed on and contacting a surface of the metallic layer away from the first semiconductor layer, wherein a refractive index of the fourth optical symmetric layer is in a range from about 1.2 to about 1.5; and a first optical symmetric layer disposed on and contacting a surface of the fourth optical symmetric layer away from the first semiconductor layer, wherein a refractive index difference between the source layer and the first optical symmetric layer is less than or equal to 0.3.