摘要:
A fabrication process for a nanoelectronic device and a device are provided. Channel material is deposited on a substrate to form a channel. A source metal contact and a drain metal contact are deposited on the channel material, and the source metal contact and the drain metal contact are on opposing ends of the channel material. A polyhydroxystyrene derivative is deposited on the channel material. A top gate oxide is deposited on the polymer layer. A top gate metal is deposited on the top gate oxide.
摘要:
A photodetector which uses single or multi-layer graphene as the photon detecting layer is disclosed. Multiple embodiments are disclosed with different configurations of electrodes. In addition, a photodetector array comprising multiple photodetecting elements is disclosed for applications such as imaging and monitoring.
摘要:
The present invention is a method and an apparatus for optical modulation, for example for use in optical communications links. In one embodiment, an apparatus for optical modulation includes a first silicon layer having one or more trenches formed therein, a dielectric layer lining the first silicon layer, and a second silicon layer disposed on the dielectric layer and filling the trenches.
摘要:
The present invention is a method and an apparatus for optical modulation, for example for use in optical communications links. In one embodiment, an apparatus for optical modulation includes a first silicon layer having one or more trenches formed therein, a dielectric layer lining the first silicon layer, and a second silicon layer disposed on the dielectric layer and filling the trenches.
摘要:
A polarization insensitive semiconductor optical amplifier (SOA) is provided. The SOA includes an active waveguide, a passive waveguide, and a taper coupler for coupling optical energy from the passive waveguide into the active waveguide, wherein the taper coupler has width W varying relative to position along a main axis z of propagation of the SOA in proportion to the minimum value of 1/CTE 01(z) 1/CTM 01(z), where CTE 01(z) represents the coefficient of energy coupling between a fundamental mode and a first order mode for the transverse electric polarization as a function of the position z, and CTM 01(z) represents the coefficient of energy coupling between a fundamental mode and a first order mode for the transverse magnetic polarization as a function of the position z.
摘要翻译:提供了偏振不敏感半导体光放大器(SOA)。 SOA包括有源波导,无源波导和锥形耦合器,用于将来自无源波导的光能耦合到有源波导中,其中锥形耦合器具有相对于沿着SOA的传播主轴线z的位置而变化的宽度W (z)1 / C TM 01(z)的最小值的比例,其中C TE 01(z) )表示作为位置z的函数的横向电极化的基模和一阶模式之间的能量耦合系数,并且C 1(z)表示 作为位置z的函数的横向磁极化的基本模式和一阶模式。
摘要:
An asymmetric twin waveguide (ATG) structure with quantum-well intermixing in the taper region of the active waveguide is disclosed. The structure comprises a first waveguide, a second waveguide, and a taper formed in the second waveguide. The taper has an intermixed area formed therein comprising a plurality of quantum wells intermixed with a plurality of barriers. The quantum wells and barriers may be intermixed using plasma-enhanced intermixing such as, for example, Argon plasma enhanced intermixing. Quantum-well intermixing reduces absorption loss normally encountered in the movement of light between waveguides.
摘要:
A semiconductor photodetector may provide charge carrier avalanche multiplication at high field regions of a semiconductor material layer. A semiconductor current amplifier may provide current amplification by impact ionization near a high field region. A plurality of metal electrodes are formed on a surface of a semiconductor material layer and electrically biased to produce a non-uniform high electric field in which the high electric field strength accelerates avalanche electron-hole pair generation, which is employed as an effective avalanche multiplication photodetection mechanism or as an avalanche impact ionization current amplification mechanism.
摘要:
An optoelectronic device comprises a photodetector feature, an interfacial layer disposed above at least a portion of the photodetector feature, and a vertical contact disposed on at least a portion of the interfacial layer. The photodetector feature comprises germanium and is operative to convert a light signal into an electrical signal. The interfacial layer comprises nickel. Finally, the vertical contact is operative to transmit the electrical signal from the photodetector feature.
摘要:
The present invention is a waveguide photodetector. In one embodiment, the waveguide photodetector includes a waveguide layer where light is guided or is confined and a detection layer formed on the waveguide layer where guided light is detected. Each of the waveguide layer and the detection layer allows for the guiding of no more than a single mode of light for a given polarization. In another embodiment, the waveguide photodetector includes a waveguide layer where light is guided or is confined, a detection layer formed on the waveguide layer where guided light is detected, a first electrical contact coupled to the detection layer, and a second electrical contact coupled to the detection layer. The first electrical contact and the second electrical contact are disposed in a spaced-apart, substantially parallel manner relative to each other.
摘要:
A method and an apparatus for doping at least one of a graphene and a nanotube thin-film transistor field-effect transistor device to decrease contact resistance with a metal electrode. The method includes selectively applying a dopant to a metal contact region of at least one of a graphene and a nanotube field-effect transistor device to decrease the contact resistance of the field-effect transistor device.