Control optical

Nelson K A 1994 Coherent control optics, molecules, and materials Ultrafast Phenomena /X ed P F Barbara, W H Knox, G A Mourou and A H Zewail (Berlin Springer) pp 47... 

IR-emitting diodes (GaAs) Remote controls, optical switches, optoisolators, choppers, pattern recognition devices... 

There are several approaches to measuring electrolyte sensors [13], ultrasonic methods (acoustical), photo-acoustic cells [14] (Siemens C02 Controller), optical IR-detection and liquid-state electrochemical... 

Figure 14.5 Factors controlling optical yield of e.d. hydrogenation [26],...

Krishnamachari, V. V., Andresen, E. R., Keiding, S. R., and Potma, E. O. 2006. An active interferometer-stabilization scheme with linear phase control. Optics Express 14 5210-15. 

Fig. 20 (a) Performance of a device, which can control optical rotator power by applying elevated electric field, (b) Optical rotation as a function of electric field strength [60]... 

This large optical activity can be used as a device with electric-field-controllable optical activity. The device performance using a mixture with 90% 5CB is shown in Fig. 20 [60]. By applying an electric field, 5CB molecules reorient toward the field direction, resulting in nonchiral N phase and rotatory power becoming almost zero. Here the contribution of the helical nanofilaments to the optical activity is very low in the transparent wavelength region. 

Araoka F, Sugiyama G, Ishikawa K, Takezoe H (2011) Electric-field controllable optical activity in the nano-segregated system composed of rod- and bent-core liquid crystals. Opt Mater Exp 1 27-35... 

Therefore, for either antipode, the diastereomeric activated complex controlling optical yield could be either the one corresponding to the formation of the x-complex or the one corresponding to the olefin insertion into the metal-hydrogen bond. In the case of rhodium, it appears from the results of the hydroformylation of 1,2-dimethylcyclohexene and of 2-methylmethylidencyclohexane, that the second case is more probable 10). In the case of platinum, the fact that isomerization of the substrate, which is very likely to occur via metal alkyl-complex formation, proceeds at a rate similar to or even higher than the hydroformylation rate seems to indicate that the same situation can also be assumed. 

Tsuruoka, T., Takahashi, R., Nakamura, T., Fuji, M., Akamatsu, K., Nawafune, H., Highly luminescent mono- and multilayers of immobilized CdTe nanocrystals controlling optical properties through post chemical surface modification. Chem. Commun. 2008, 1641-1643. 

In order to determine the contact angle between such a film and the solution by a precise mechanical device, the capillary is moved vertically and is positioned to a level where the solution surface around the bubble becomes strictly flat [124,125]. This can be controlled optically by means of a microscope, situated above the device. Then the radius and the height of the spherical segment is measured with a horizontal microscope (from aside) and the contact angle is calculated from the data. 

Recently in the field of physics of semiconductors and materials science a great attention has been paid to formation and optical properties of semiconductor nanocrystals (quantum dots, QDs) dispersed in inorganic matrixes. An interest to glassy materials with QDs is associated with their unique physical properties and possibility to create elements of optoelectronic devices. Phase separation processes followed by crystallization are the basic in production of such materials. They result in formation of semiconductor nanocrystals stabilized within a glass matrix. The materials are advanced for various applications because of optical and thermal stability and possibility to control optical features through the technology of glass preparation and post-synthesis thermal treatment. 

CeTi-doped silicate glasses demonstrate the controllable optical features with coloring in the yellow-orange range that is of interest for selective filters of signal lamps. The structural and optical studies argue on the nature of color centers formed on the basis of Ce-Ti-binary oxide nanophases stabilized within the glass matrix. 

The new water soluble highly stable metal-polysaccharide nanocomposites of noble metals have been fabricated within the framework of the new approach to the synthesis of hybrid nanosized materials on the basis of arabinogalactan. Distinctive optical properties of the nanoparticles are demonstrated as the plasmonic resonance. Nanobiocomposites with target optical characteristics have a great potential to design promising multifunctional materials with controlled optical properties as well as new optical systems and optical markers in medicine. 

---