Patent ID: 6177684
Filing Date: 2001-01-23
Classification: B82Y,H01L,H01S

Abstract:
A quantum semiconductor device, comprising:a semiconductor substrate;an active layer formed on said semiconductor substrate and including a quantum structure,said quantum structure comprising:a plurality of intermediate layers stacked on each other repeatedly, each of said plurality of intermediate layers being formed of a first semiconductor crystal having a first lattice constant;each of said intermediate layers including a plurality of quantum dots of a second semiconductor crystal having a second lattice constant different from said first lattice constant, said second semiconductor crystal forming thereby a strained system with respect to said first semiconductor crystal, each said quantum dots in an intermediate layer having a height substantially identical with a thickness of said intermediate layer;said quantum dot in an intermediate layer aligning with another quantum dot in an adjacent intermediate layer in a direction perpendicular to a principal surface of said semiconductor substrate;each of said plurality of intermediate layers having a thickness equal to or smaller than a Bohr-radius of carriers in said intermediate layer,wherein each of said plurality of quantum dots has a composition represented as InN.sub.x As.sub.1-x, with a compositional parameter x not exceeding 0.04.