WebNov 15, 2013 · We introduce the notion of a $\mathcal{PT}$-symmetric dimer with a ${\ensuremath{\chi}}^{(2)}$ nonlinearity. Similarly to the Kerr case, we argue that such a nonlinearity should be accessible in a pair of optical waveguides with quadratic nonlinearity and gain and loss, respectively. An interesting feature of the problem is that … WebApr 4, 2014 · Claddings based on a polymer matrix containing chromophores have been introduced, and their strong $\chi^{(2)}$ nonlinearity has already been used to demonstrate ultralow power consuming modulators. However, these silicon–organic hybrid (SOH) devices inherit not only the advantageous properties; these polymer claddings …
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Web2 days ago · Zhou’s paper detailing the findings is set to receive a best paper honorable mention award at the 2024 Conference on Human Factors in Computing Systems (CHI). … WebSep 3, 2013 · Abstract: We introduce the notion of a ${\cal PT}$-symmetric dimer with a $\chi^{(2)}$ nonlinearity. Similarly to the Kerr case, we argue that such a nonlinearity should be accessible in a pair of optical waveguides with quadratic nonlinearity and gain and loss, respectively. An interesting feature of the problem is that because of the two ... organic milk producers humane
Material Properties of Lithium Niobate • Covesion
SHG measurements are performed using a Coherent Libra amplified Ti:sapphire pump laser (λ=800 nm, 50 fs pulse width and 1 kHz repetition rate) weakly focused on the test samples with a beam waist of 2 mm and an approximate pulse energy of ∼40 μJ; negligible SHG was detected from the sapphire substrate at this … See more Pentacene/C60 bilayers used in SHG measurements are grown on pre-cleaned, ultraviolet–ozone-treated sapphire wafers in a thermal evaporator with a base pressure of ∼10−7 … See more The data that support the findings of this study are available from the corresponding author on reasonable request. See more Polarized EQE and EA measurements are carried out on Pn/C60 photovoltaic devices using a laser-driven Xenon lamp filtered through a … See more The near and far fields of both fundamental (λ=800 nm) and SH (λ=400 nm) waves are calculated using the nonlinear material implementation of the commercial FDTD … See more Webchi-square dis·tri·bu·tion. a variable is said to have a chi-square distribution with K degrees of freedom if it is distributed like the sum of the squares of K independent random … WebLong answer: Basically, $\chi^{(3)}$ is a rank four tensor with 81 components. You then apply the Neuman principle saying that symmetries of the crystal that supports $\chi^{(3)}$ should also be the symmetries of the tensor. Then you look for independent components of this tensor, which boils down to looking for trivial irreducible sub-representations in the … organic milk prices graph