1 results about "Ground state" patented technology
Filter
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
The ground state of a quantum-mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system. An excited state is any state with energy greater than the ground state. In the quantum field theory, the ground state is usually called the vacuum state or the vacuum.
InactiveCN101308888AImprove optical property temperature stabilityOptical properties Good temperature stabilityLaser detailsSemiconductor lasersCushioningElectron hole
Disclosed is a material structure which is capable of improving optical temperature stability of self-organized quantum dots. The material structure comprises a substrate; a cushioning layer is arranged on the substrate to conceal the defect of the substrate so as to make the growth surface plane; a quantum well layer is arranged on the cushioning layer to generate stress relaxation during the growth and guides the stress relaxation to the quantum dot layer above so as to reduce the thickness of the wetting layer; a barrier layer is arranged on the quantum dot layer and is capable of restricting the current carrier in the quantum dot layer to avoid the weakening of optical temperature stability of the quantum dot material caused by thermally excited transition; a quantum dot layer is arranged on the barrier layer and generates electron hole pairs and radiates composite light when being excited; a cover layer is arranged on the quantum dot layer and is used to change the optical property of the quantum dots and to increase the level spacing between the ground state and the excited state.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI