Single atom transistor

Single atom transistor

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An optical transistoralso known as an optical switch or a light valveis a device that switches or amplifies optical signals, single atom transistor. Since the input signal intensity may be weaker than that of the source, an optical transistor amplifies the optical signal. The device is the optical analog of the electronic transistor that forms the basis of single atom transistor electronic devices. Optical transistors provide a means to control light using only light and has applications in optical computing and fiber-optic communication networks, single atom transistor.

Such technology has the potential to exceed the speed of electronics [ citation needed ]while conserving more power. Since photons inherently do not interact with each other, an optical transistor must employ an operating medium to mediate interactions.

This is done without converting optical to electronic signals as an intermediate step. Implementations using a single atom transistor of operating mediums have been proposed and experimentally demonstrated. However, their ability to compete with modern electronics is currently limited. Optical transistors could be used to improve the performance of fiber-optic communication networks. Although fiber-optic cables are used to transfer data, tasks such as signal routing are done electronically.

This requires optical-electronic-optical conversion, which form bottlenecks. In principle, single atom transistor, all-optical digital signal processing and routing is achievable using single atom transistor transistors arranged into photonic integrated circuits, single atom transistor. A more elaborate application of optical transistors is the development of an optical digital computer in which components process photons rather than electrons, single atom transistor.

Further, optical transistors that operate using single photons could form an integral part of quantum information processing where they can be used to selectively address individual units of quantum information, known as qubits. Optical transistors could in theory be impervious to the high radiation of space and extraterrestrial planets, unlike electronic transistors which suffer from Single-event upset.

The most commonly argued case for optical logic is that optical transistor switching times can be much faster than in conventional electronic transistors. This is due to the fact that the speed of light in an optical medium is typically much faster than the drift velocity of electrons in semiconductors, single atom transistor.

Optical transistors can be directly linked to fiber-optic cables whereas electronics requires coupling via photodetectors and LEDs or lasers. The more natural integration of all-optical signal processors with fiber-optics would reduce the complexity and delay in the routing single atom transistor other processing of signals in optical communication networks.

It remains questionable whether optical processing can reduce the energy required to switch a single transistor to be less than that for electronic transistors. To realistically compete, transistors require a few tens of photons per operation.

It is clear, however, that this is achievable in proposed single-photon transistors [2] [3] for quantum information processing. Perhaps the most significant advantage of optical over electronic logic is reduced power consumption. This comes from the absence of capacitance in the connections between individual logic gates. In electronics, the transmission line needs to be charged to the signal voltage. The capacitance of a single atom transistor line is proportional to its length and it exceeds the capacitance of the transistors in a logic gate when its length is equal to that of a single gate.

The charging of transmission lines is one of the main energy losses in electronic logic. This loss is avoided in optical communication where only enough energy to switch an optical transistor at the receiving end must be transmitted down a line. This fact has played a major role in the uptake of fiber optics for long distance communication but is yet to be exploited at the microprocessor level. Besides the potential advantages of higher speed, lower power consumption and high compatibility with optical communication systems, optical transistors must satisfy a set of benchmarks before they can compete with electronics, single atom transistor.

Several schemes have been proposed to implement all-optical transistors. In many cases, a proof of concept has been experimentally demonstrated. Among the designs are those based on:. From Wikipedia, the free encyclopedia. Redirected from Optical switch. Optical network on chip Optical single atom transistor Optical switch Parallel single atom transistor interface Optical communication Optical fiber cable Photonics Optoelectronics Electronics Transistor Optical physics Light Photons Optics Lasers Diodes Semiconductors Electrical elements Electronic components.

March Journal of Physics D. arXiv : Bibcode single atom transistor JPhD doi : Physical Review Letters. Bibcode : PhRvL. PMID Physical Review A.

Bibcode : PhRvA. Nature Photonics. Bibcode : NaPho Bibcode : Sci Journal of the Optical Society of America B. Bibcode : JOSAB. Applied Physics Letters. Bibcode : ApPhL. Optics Letters. Bibcode : OptL Nature Communications. Bibcode : NatCo Nov Nature Nanotechnology. Bibcode : NatNa ISBN Categories : Optoelectronics Transistor types. Hidden categories: All articles with unsourced statements Articles with unsourced statements from March Navigation menu Personal tools Not logged in Talk Contributions Create account Log in.

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The Fallout world is not our own, but rather one set in a universe that shares many historical milestones prior to the events of World War blogger.com-game 2Non-game 3Non-game 4 So, while it takes place in the future, it is not our future, but one reflecting a traditional s-style science fiction "world of tomorrow".Non-game 5 In a nutshell, the world of Fallout is an eclectic, predominantly An optical transistor, also known as an optical switch or a light valve, is a device that switches or amplifies optical blogger.com occurring on an optical transistor’s input changes the intensity of light emitted from the transistor’s output while output power is supplied by an additional optical source A high resolution image of a graphene transistor with a sheet of carbon only one atom thick. This high speed electronic device was created using nanoscale processes, and may one day be used for better computer chips. (Courtesy of James Yardley, Columbia University Nanocenter, an NNI-sponsored NSEC)