Entanglement of the l- and the r-photons in an anisotropic crystal

Gamma radiation induced variation in structure formation and optical characteristics of evaporated tris [2-phenylpyridinato-C2,N]iridium(III) films prepared by electron beam evaporator in photovoltaic applications

“…Transmittance (T) and Reflectance (R) Figure 5 displays the optical transmittance (T ) and reflectance (R) spectra of the as-deposited and three irradiated Ir ppy 3 ( ) thin films for doses of 3, 6, and 9 kGy. The spectra showed interference fluctuations ranging from 200 to 1200 nm, which were caused by the internal reflections at the quartz interface region resulting from the destructive and constructive interferences demonstrated as different amplitudes (minima and maxima) in the presented spectra [46]. This characteristic is considered a sign of optical quality of the Ir ppy 3 ( ) films.…”

“…It is noticed that the (k) values rise when increasing the dose of radiation, this is owing to the decline in carrier concentration and defect state density, both of which reduce the (k) value [54]. The presence of impurities and structural flaws prevent the (k) value to approach zero at λ> 1500 nm [46]. Moreover, two absorption peaks in the ultraviolet and visible areas of the film's spectra may be found at wavelengths of 300 and 500 nm.…”

Research and Design of Optical-Fiber-Embedded Structure in Optical Printed Circuit Board under Thermal Shock

“…In generally, FR-4 plates are grooved and followed by placing optical fiber into the groove as optical layer, and adhesive with electrical layers by prepreg using partly compatible processes of conventional PCBs [1][2][3]. This is the general fabrication process of OPCB.…”

“…Embedding optical fiber as optical channel in conventional PCB, OPCB (Optical Printed Circuit Board) realizes optical interconnection between chips and increases signal frequency and density in board-level circuit. OPCB applies optical fiber transmission to board level circuit, but raises new requirement for structure design, especially the design of optical-fiber-embedded structure which has been a hot area of research with many different embedded structures presented by scholars at home and abroad [1][2][3][4][5]. In the service of OPCB, the stress in fiber is different from different embedded structures, which will affect the reliability of fiber in OPCB.…”

Improved Algorithm of DSCM for Seriously Polluted Images

“…In the field of optical measurement, sometimes the images for matching contain no obvious graphical objects (grayscale variation, contour, texture,etc), images are composed of random gray speckles, as shown in Fig. 1, and the image matching measure usually be a kind of correlation algorithm, so this kind of image matching method called digital speckle correlation method(DSCM) [1][2][3][4][5][6].DSCM's mathematical description can be made as follows:…”