These structures have a density of states given by a series of delta-function-like peaks, which makes them attractive as a lasing medium in their namesake variant of the vertical cavity surface-emitting laser.
These structures have a density of states given by a series of delta-function-like peaks, which makes them attractive as a lasing medium in their namesake variant of the vertical cavity surface-emitting laser. That same property of the energy spectrum of these structures means that they provide an ideal environment for studying the band gap and exciton binding energy reduction obtained via a variant of the Stark effect. One way of creating these structures out of thin fiÂlms is via self-assemblyduring the Stranski-Krastanow mode, which generates these structures when the critical thickness is exceeded. That process involves depositing monolayers via epitaxial growth, with the result that these structures form when the lattice mismatch between substrate and fiÂlm causes the fiÂlm to buckle upwards, forming pyramids; they can also be obtained by lithographically etching a pillar from a quantum well or a double-barrier heterostructure. Sometimes known as mesoscopic or artiÂficial atoms,for 10 points, identify these semiconductor structures which conÂfine in three dimensions a small number of electrons, and take their name from the fact that they are zero-dimensional relative to the bulk material.
These structures have a density of states given by a series of delta-function-like peaks, which makes them attractive as a lasing medium in their namesake variant of the vertical cavity surface-emitting laser.
quantum dots [prompt on anything like "quantum islands" before "delta function"]