摘要:
Tensile strained germanium is provided that can be sufficiently strained to provide a nearly direct band gap material or a direct band gap material. Compressively stressed or tensile stressed stressor materials in contact with germanium regions induce uniaxial or biaxial tensile strain in the germanium regions. Stressor materials may include silicon nitride or silicon germanium. The resulting strained germanium structure can be used to emit or detect photons including, for example, generating photons within a resonant cavity to provide a laser.
摘要:
A semiconductor laser element includes: a window region including a disordered portion formed by diffusion of a group-III vacancy, the diffusion promoted by providing on the window region a promoting film that absorbs a predetermined atom; a non-window region including an active layer of a quantum well structure; and a difference equal to or larger than 50 meV between an energy band gap in the window region and an energy band gap in the non-window region.
摘要:
Suspended structures are provided using selective etch technology. Such structures can be protected on all sides when the selective undercut etch is performed, thereby providing excellent control of feature geometry combined with superior material quality.
摘要:
Tensile strained germanium is provided that can be sufficiently strained to provide a nearly direct band gap material or a direct band gap material. Compressively stressed or tensile stressed stressor materials in contact with germanium regions induce uniaxial or biaxial tensile strain in the germanium regions. Stressor materials may include silicon nitride or silicon germanium. The resulting strained germanium structure can be used to emit or detect photons including, for example, generating photons within a resonant cavity to provide a laser.
摘要:
Methods of manufacture of advanced electronic and photonic structures including heterojunction transistors, transistor lasers and solar cells and their related structures, are described herein. Other embodiments are also disclosed herein.
摘要:
A semiconductor laser element includes: a window region including a disordered portion formed by diffusion of a group-III vacancy, the diffusion promoted by providing on the window region a promoting film that absorbs a predetermined atom; a non-window region including an active layer of a quantum well structure; and a difference equal to or larger than 50 meV between an energy band gap in the window region and an energy band gap in the non-window region.
摘要:
A semiconductor laser device structure comprising an active region provided by a quantum well of an indirect bandgap material, the quantum well being divided laterally to form an active region comprising a two dimensional array of localized cells. Preferably the quantum well of indirect band gap material is selected from group IV semiconductor materials and comprises a silicon-germanium alloy. A silicon/silicon-germanium alloy multi-quantum well (MQW) structure is described. In a preferred embodiment, a Si/SiGe alloy MQW laser diode comprises a coplanar double grating configuration etched through the MQW structure to provide distributed feedback. The double intersecting grating structure functions to define an array of "cells" or regions of finite dimensions in the quantum well structure which "localize" carriers within the cells thereby enhancing the radiative emission probability. The grating also provides for combined gain-coupled and index-coupled distributed feedback. The diode structure is preferably designed using a suitable Si/SiGe alloy composition and QW layer thicknesses, to provide for lasing at wavelengths compatible with fiber optic communication applications.
摘要:
Suitably modified molecular beam epitaxy (MBE) techniques are used to synthesize single crystal, periodic monolayer superlattices of semiconductor alloys on single crystal substrates maintained below a critical growth temperature. Described is the fabrication of periodic structures of (GaAs).sub.n (AlAs).sub.m, where m and n are the number of contiguous monolayers of GaAs and AlAs, respectively, in each period of the structure. As many as 10,000 monolayers were grown in a single structure. Also described is the MBE growth of (Al.sub.x Ga.sub.1-x As).sub.n (Ge.sub.2).sub.m, quasi-superlattice and non-superlattice structures depending on the particular values of n, m and the growth temperature. Waveguides, heterostructure lasers and X-ray reflectors using some of the structures are also described.
摘要翻译:合适改性的分子束外延(MBE)技术用于合成在保持低于临界生长温度的单晶衬底上的半导体合金的单晶,周期性单层超晶格。 描述了(GaAs)n(AlAs)m的周期性结构的制造,其中m和n分别是在结构的每个周期中的GaAs和AlAs的连续单层的数量。 多达10,000个单层生长在单一结构中。 还描述了取决于n,m的特定值和生长温度的(Al x Ga 1-x As)n(Ge 2)m,准超晶格和非超晶格结构的MBE生长。 还描述了使用一些结构的波导,异质结构激光器和X射线反射器。
摘要:
A wavelength tunable silicon-on-insulator (SOI) laser comprising: a laser cavity including: a semiconductor gain medium having a front end and a back end; and a phase-tunable waveguide platform coupled to the front end of the semiconductor gain medium; wherein the phase-tunable waveguide platform includes a first Distributed Bragg Reflector (DBR) and a second Distributed Bragg Reflector (DBR); at least one of the Distributed Bragg Reflectors having a comb reflectance spectrum; and wherein a mirror of the laser cavity is located at the back end of the semiconductor gain medium.
摘要:
Tensile strained germanium is provided that can be sufficiently strained to provide a nearly direct band gap material or a direct band gap material. Compressively stressed or tensile stressed stressor materials in contact with germanium regions induce uniaxial or biaxial tensile strain in the germanium regions. Stressor materials may include silicon nitride or silicon germanium. The resulting strained germanium structure can be used to emit or detect photons including, for example, generating photons within a resonant cavity to provide a laser.