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We demonstrate a two-element symmetric-connected photodiode array (SC-PDA) for high-power and high-speed applications. A traditional traveling-wave photodiode array (TW-PDA), an SC-PDA, and a single PD with the same epitaxial structure were fabricated and tested. Both the TW-PDA and SC-PDA have higher saturation currents, larger RF power, and better high-power and high-frequency responses than the...
The micro-Raman spectra of as-grown area SQW GaAs/AlGaAs shows 281, 378 cm−1 for GaAs-like LO, AlAs-like LO of AlGaAs barrier, demonstrating two-mode behavior. For rolled-up microtubes, all LO modes shifted to lower frequencies.
GaAs/InGaAs/GaAs core-multishell nanowire heterostructure with a thin InGaAs quantum well is fabricated. Photoluminescence of the quantum well exhibits a blue shift along the nanowire due to the difference of diffusion length between In and Ga.
We have designed and fabricated a RCE dual-absorption photodetector. In comparison with conventional ones, our design possesses higher quantum efficiency without imparing other optical properties of the device. In addition, its high speed properties can be obtained.
We propose a novel design for photonic crystal fiber, which has flattened-dispersion (between −1.65 and 0.0 ps/nm/km from 1.45 to 1.65µm), high nonlinearity (larger than 33 W−1km−1) and low confinement loss (order of 10−4 dB/km). Analysis shows flat supercontinuum (70nm) at 1550nm is achieved through only 150m-long fiber.
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