摘要:
To provide a light-emitting element where electrons are efficiently injected into a Ge light emission layer and light can be efficiently emitted, the light-emitting element has a barrier layer 3 which is formed on an insulating film 2, worked in a size in which quantum confinement effect manifests and made of monocrystalline Si, a p-type diffused layer electrode 5 and an n-type diffused layer electrode 6 respectively provided at both ends of the barrier layer 3, and a monocrystalline Ge light emission part 13 provided on the barrier layer 3 between the electrodes 5, 6. At least a part of current that flows between the electrodes 5, 6 flows in the barrier layer 3 in a horizontal direction with respect to a substrate 1.
摘要:
In order to provide a highly reliable silicon-germanium semiconductor optical element of high luminous efficiency or of low power consumption that can reduce or prevent the occurrence of dislocations or crystal defects on the interface between a light emitting layer or a light absorption layer and a cladding layer, in a silicon-germanium semiconductor optical element, a germanium protective layer 11 of non-light emission is disposed between a germanium light emitting layer or the light absorption layer 10 and a cladding layer 12 disposed above a substrate. The germanium protective layer 11 has the electrical conductivity different from electrical conductivity of the germanium light emitting layer or the light absorption layer 10.
摘要:
To provide a light-emitting element where electrons are efficiently injected into a Ge light emission layer and light can be efficiently emitted, the light-emitting element has a barrier layer 3 which is formed on an insulating film 2, worked in a size in which quantum confinement effect manifests and made of monocrystalline Si, a p-type diffused layer electrode 5 and an n-type diffused layer electrode 6 respectively provided at both ends of the barrier layer 3, and a monocrystalline Ge light emission part 13 provided on the barrier layer 3 between the electrodes 5, 6. At least a part of current that flows between the electrodes 5, 6 flows in the barrier layer 3 in a horizontal direction with respect to a substrate 1.
摘要:
In order to provide a highly reliable silicon-germanium semiconductor optical element of high luminous efficiency or of low power consumption that can reduce or prevent the occurrence of dislocations or crystal defects on the interface between a light emitting layer or a light absorption layer and a cladding layer, in a silicon-germanium semiconductor optical element, a germanium protective layer 11 of non-light emission is disposed between a germanium light emitting layer or the light absorption layer 10 and a cladding layer 12 disposed above a substrate. The germanium protective layer 11 has the electrical conductivity different from electrical conductivity of the germanium light emitting layer or the light absorption layer 10.
摘要:
An APD in which a first undoped semiconductor region and a second undoped semiconductor region having different semiconductor materials and arranged on an insulating film configure a photo-absorption layer and a multiplying layer, respectively, is employed, whereby crystalline of an interface between the photo-absorption layer and the multiplying layer becomes favorable, and a dark current caused by crystal defects can be decreased. Accordingly, light-receiving sensitivity of an avalanche photodiode can be improved. Further, doping concentration of the light-receiving layer and the multiplying layer can be made small. Therefore, a junction capacitance of the diode can be decreased, and a high-speed operation becomes possible.
摘要:
A germanium light-emitting device emitting light at high efficiency is provided by using germanium of small threading dislocation density. A germanium laser diode having a high quality germanium light-emitting layer is attained by using germanium formed over silicon dioxide. A germanium laser diode having a carrier density higher than the carrier density limit that can be injected by existent n-type germanium can be provided using silicon as an n-type electrode.
摘要:
A semiconductor photodiode device includes a semiconductor substrate, a first buffer layer containing a material different from that of the semiconductor substrate in a portion thereof, a first semiconductor layer formed above the buffer layer and having a lattice constant different from that of the semiconductor substrate, a second buffer layer formed above the first semiconductor layer and containing an element identical with that of the first semiconductor layer in a portion thereof, and a second semiconductor layer formed above the buffer layer in which a portion of the first semiconductor layer is formed of a plurality of island shape portions each surrounded with an insulating film, and the second buffer layer allows adjacent islands of the first semiconductor layer to coalesce with each other and is in contact with the insulating film.
摘要:
An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.
摘要:
A semiconductor photodiode includes a semiconductor substrate; a first conduction type first semiconductor layer formed above the semiconductor substrate; a high resistance second semiconductor layer formed above the first semiconductor layer; a first conduction type third semiconductor layer formed above the second semiconductor layer; and a second conduction type fourth semiconductor layer buried in the second semiconductor layer, in which the fourth semiconductor layer is separated at a predetermined distance in a direction horizontal to the surface of the semiconductor substrate.
摘要:
An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.