Optical logic

Xu Q. Lipson, M., All optical logic based on silicon micro ring resonators, Opt. Express, 2007, 15, 924 929... 

In the future, it is expected that the C3 laser may become part of optical logic circuitry. This will be feasible because of the laser s tunability and from the electrical isolation of the two half-lasers. See Fig. 10. 

Optical bistability is a nonlinear process where for the same optical input intensity in a material, there are two possible output intensities and it is a consequence of nonlinear saturable absorption. Optical bistability allows the design of optical logical circuits and will play a fundamental role in the development of optical communication and optical computing [16-18]. 

Roy Jitendra Nath (2007) "Mach-Zehnder interferometer-based tree architecture for all-optical logic and arithmetic operations" Optik - International Journal for light and Electron Optics, In Press, available onhne 26 November 2007. 

While the stability of LB spiropyrans needs to be improved for longterm device use (thermal fatigue being the main problem), these materials have much potential as components in multifrequency memory and optical logic devices. This can be achieved by using a multilayer structure... 

Nanosized noble metal gold nanoparticles (AuNPs 10 nm)-doped dielectric composite titania films [323] with large third-order nonlinear susceptibility were reported to be applied to optical information processing devices, such as optical switch or all optical logical gates. The third-order nonlinear refractive index and nonlinear absorption coefficient of the films were on the order of 10 cm and 10 cm with nonlinear susceptibility = 6.88 x 10 ° esu. 

Reverse The logical opposite of the intention This is mostly applicable to activities, for example reverse flow or chemical reaction. It can also be applied to substances, e.g. Poison instead of Antidote or D instead of L optical isomers... 

Four different types of tasks are performed by automation. Two involve the sequencing of valves and pumps Involved 1n the setup and completion of the designed experiment through the operation of the test and hydraulic fluid systems. The other tasks involve the control of the temperature bath and data collection. To perform these tasks, a1r-actuated solenoids and optically coupled sol Id-state relays are used. These devices are controlled by an electrical circuit consisting of the device connected 1n series with a power supply and a channel on the actuator card In the HP 3497. The power supply 1s either 24 VDC for use with the solenoids or 5 VDC for the solid-state relays. The actuator output channel acts as a simple on/off switch which allows power to be supplied to the solenoid or relay when closed. The logic of the circuit 1s controlled by application programs running on the local HP 1000. 

To explain the difference between the experimental results and theory, Doherty et al. (4J have given an empirical and a theoretical hypothesis. The theoretical hypothesis concerns the question of the meaning to be attached to the concept of the "equivalent random link" in the statistical theory of the randomly-jointed chain. According to Doherty et al., the assumption that the optical properties of the chain are describable by a randomly jointed model, using the same value of n, as for the description of stress has no strictly logical foundation. 

The creation of nanoscale sandwiches of compound semiconductor heterostructures, with gradients of chemical composition that are precisely sculpted, could produce quantum wells with appropriate properties. One can eventually think of a combined device that incorporates logic, storage, and communication for computing—based on a combination of electronic, spintronic, photonic, and optical technologies. Precise production and integrated use of many different materials will be a hallmark of future advanced device technology. 

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