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A scheme for active temporal‐to‐spatial demultiplexing of single photons generated by a solid‐state source is introduced. The scheme scales quasi‐polynomially with photon number, providing a viable technological path for routing n photons in the one temporal stream from a single emitter to n different spatial modes. Active demultiplexing is demonstrated using a state‐of‐the‐art photon source—a quantum‐dot...
Photopyroelectric spectroscopy is used to study the variation of optical absorption of the ceramic xMnO2 - 0.4 Bi2O3 - 0.4 TiO2 - ZnO, x = 0, 0.4 mol% sintered for 1 - 4 hours at the isothermal temperature, 1220 oC. The wavelength of incident light, modulated at 12 Hz, is kept in the range 310 to 810 nm. The band-gap energy is reduced from 3.2 eV (for pure ZnO) to 2.83 eV for 0 mol% MnO2 for 1 hour...
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