Abstract:
A silicon-based, IC-compatible luminescent diode (LED) or laser diode (LD) has a light-emitting layer based on semiconductor ruthenium silicide (Ru2Si3) on silicon for the near infrared wavelength range around 1.5 mu m. This component has an epitaxial Si/Ru2Si3Si or Si/Ru2Si3 heterostructure with band discontinuities of more than 0.05 eV for electrons or holes in order to achieve charge carrier confinement and thus an efficient light yield at room temperature.
Abstract:
The invention provides a quantum cascade laser device (100, 101) in a semiconductor substrate (11), which quantum cascade laser device (100, 101) comprises a plurality of semiconductor layers (14) having a side surface (13) that exposes a side of each semiconductor layer. The quantum cascade laser device (100,101) emits a light beam (L) in a direction substantially perpendicular to the side surface (13) of the quantum cascade laser device (100,101), which side surface (13) is essentially parallel to a top surface of the semiconductor substrate (11). The power loss of the quantum cascade laser device (100,101) is reduced considerably, because the light beam (L) is not diffracted or reflected before it is emitted from the quantum cascade laser device (100,101), which improves the power efficiency of the quantum cascade laser device (100,101). The invention further provides a method of manufacturing such a quantum cascade laser device (100,101).
Abstract:
A wavelength tunable silicon-on-insulator (SOI) laser comprising: a laser cavity including: a semiconductor gain medium (2) having a front end (21) and a back end (22); and a phase-tunable waveguide platform (3) coupled to the front end of the semiconductor gain medium; wherein the phase-tunable waveguide platform includes a first Distributed Bragg Reflector (31) and a second Distributed Bragg Reflector (32); at least one of the Distributed Bragg Reflectors having a comb reflectance spectrum; and wherein a mirror (10) of the laser cavity is located at the back end (22) of the semiconductor gain medium. The coupled cavity allows via the Vernier effect improved mode selectivity and the electro-optic tuning of the gratings results in faster wavelength tuning of the ECLD.A further phase control element (53) may compensate for a thermal wavelength drift of the laser.
Abstract:
A light source is based on a combination of silicon and calcium fluoride (CaF 2 ). The silicon and the calcium fluoride need not be pure, but may be doped, or even alloyed, to control their electrical and/or physical properties. Preferably, the light source employs interleaved portions, e.g., arranged as a multilayer structure, of silicon and calcium fluoride and operates using intersubband transitions in the conduction band so as to emit light in the near infrared spectral range. The light source may be arranged so as to form a quantum cascade laser, a ring resonator laser, a waveguide optical amplifier.
Abstract translation:光源基于硅和氟化钙(CaF 2 N 2)的组合。 硅和氟化钙不必是纯的,而是可以掺杂或甚至合金化以控制其电和/或物理性质。 优选地,光源采用硅和氟化钙的交错部分,例如布置为多层结构,并且使用导带中的子带间跃迁进行操作,以便在近红外光谱范围内发光。 光源可以被布置成形成量子级联激光器,环形谐振器激光器,波导光学放大器。
Abstract:
A silicon-based, IC-compatible luminescent diode (LED) or laser diode (LD) has a light-emitting layer based on semiconductor ruthenium silicide (Ru2Si3) on silicon for the near infrared wavelength range around 1.5 mu m. This component has an epitaxial Si/Ru2Si3Si or Si/Ru2Si3 heterostructure with band discontinuities of more than 0.05 eV for electrons or holes in order to achieve charge carrier confinement and thus an efficient light yield at room temperature.
Abstract:
A semiconductor optical device which uses a mixed crystal comprising Ge, C, Sn, etc., of Group IV semiconductors having a different atomic radius from that of Si as a light emission layer, disposes light emission layers at a period of integral multiples of the half of the light emission wavelength, and separates the light emission layer from a light modulation region. Since a multi-layered structure of the Group IV semiconductors such as Si and Ge, C, Sn is used, local strain due to a difference in atomic radius increases light emission efficiency, and the multi-layered film functions as an interference device of light. Because only light with a wavelength twice this period can exist inside the multi-layered film, light emission efficiency can be increased. Further, since the multi-layered structure has a periodical structure which is integral multiples of the half of the light emission wavelength, the light emission intensity can be increased. Since the light emission region and the light modulation region are formed adjacent to each other on the same substrate, a semiconductor optical device capable of high-speed light modulation can be accomplished. Because this structure can extremely reduce lattice mismatching with the substrate, no limitation on a layer thickness such as a critical film thickness exists. Accordingly, a design freedom for a film thickness for confining light and carriers and a band discontinuity value can increase, and a light emission intensity can be improved to about ten times that with the prior art devices.
Abstract:
A light source is based on a combination of silicon and calcium fluoride (CaF 2 ). The silicon and the calcium fluoride need not be pure, but may be doped, or even alloyed, to control their electrical and /or physical properties. Preferably the light source employs interleaved portions, e.g., arranged as a multilayer structure, of silicon (109) and calcium fluoride (107, 111 ) and operates using intersubband transitions in the conduction band so as to emit light in the near infrared spectral range. The light source may be arranged so as to form a quantum cascade laser, a ring resonator laser, a waveguide optical amplifier.
Abstract translation:光源基于硅和氟化钙(CaF 2 N 2)的组合。 硅和氟化钙不必是纯的,而是可以掺杂或甚至合金化以控制其电和/或物理性质。 优选地,光源采用例如布置为硅(109)和氟化钙(107,111)的多层结构的交错部分,并且使用导带中的子带间转变进行操作,以便在近红外光谱范围内发光。 光源可以被布置成形成量子级联激光器,环形谐振器激光器,波导光学放大器。
Abstract:
A laser structure includes at least one active layer having doped Ge so as to produce light emissions at approximately 1550nm from the direct band gap of Ge. A first confinement structure is positioned on a top region of the at least one active layer. A second confinement structure is positioned on a bottom region the at least one active layer.
Abstract:
A Sin/ Sim supelattices (10) is grown on a substrate (11) where the thicknesses of the Si and Si layers n and m, respectively, is in the unit of atomic layers. The Sin/ Sin superlattice (10) is composed of alternating layers of isotopically enriched Si and Si layers in the crystallographic direction . The number of periods, that is, the number of Si and Si layer pairs in this embodiment, is two. The superlattice (10) is grown in a direction that is not parallel to the direction of the dominant intervalley electron scattering. The most preferred direction of the isotope superlattice for the case of Si is since it has the same angles to the directions (A-B, C-C'', C'-C''').