Jun-feng Song

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Si modulators and Ge photodetectors are monolithically integrated on Si-on-insulator. The carrier-depletion-type Si modulators achieved high modulation efficiency and speed (<i>V</i> <sub>¿</sub> <i>L</i> <sub>¿</sub> = 2.56 V·cm, 10 Gb/s). Low-voltage operation (<i>V</i> <sub>RF</sub> = 1 <i>V</i> <sub>pp</sub>) was also demonstrated. Introducing a(More)
In this letter, a 2 &#x00D7; 2 thermo-optic waveguide-based switch with ultralow power consumption is demonstrated and fabricated using a standard complementary metal-oxide-semi conductor (CMOS) process. The phase arms are suspended by removing adjacent SiO<sub>2</sub> and 120 &#x03BC;m of the underlying Si, while leaving a few SiO<sub>2</sub> beams to(More)
A flow injection (FI) method with a biamperometric detector, based on the biamperometry for an irreversible redox couple, is described for the determination of phenols in environmental wastewater. The method relies on coupling of the oxidation of phenols at one platinum-wire electrode with the reduction of MnO4- at another platinum wire electrode to enable(More)
In this letter, we present a carrier-induced silicon waveguide Bragg grating filter with a p-i-n junction. The carrier-induced Bragg grating is formed on the rib silicon waveguide by ion implantation technology. The bandwidth and the extinction ratio of the filter are 0.3 nm and 14 dB, respectively. It can be tuned by both forward and reverse biases. The(More)
We study the eigenmodes of optical Tamm states (OTSs) at metal-distributed Bragg reflector interface. A peculiar type of non-propagating OTSs, named as evanescent OTSs, is found with mode propagation constant exhibiting the imaginary part to be much larger than the real part. The existence of such evanescent OTSs is attributed to the extension of Bragg(More)
AIM To express the growth-associated protein-43 (GAP-43)in prokaryotic cells and prepare monoclonal antibody( mAb)against GAP-43. METHODS Full length sequence of GAP-43 gene was amplified from the plasmid containing pGAP-43cDNA and was cloned into the expression vector pGEX-4T-I.GST-GAP-43 fusion protein was expressed in E. coil under IPTG induction.(More)
Exposure to triorthocresyl phosphate (TOCP) may result in a late neurological complication, i.e. organophosphate-induced delayed neuropathy (OPIDN). The aim of this study was to examine changes in levels of cyclin-dependent kinase 5 (CDK5) and of its activator, p35/p25, in the spinal cord of hens treated by TOCP. After exposure to a single dose of TOCP,(More)
A high performance monolithically integrated WDM receiver is fabricated on the SOI platform, with key components comprising a 1 x 32 Si-based AWG and an array of high speed waveguided Ge-on-Si photodetectors. The optical channel spacing is 200 GHz. This configuration was used to demonstrate 32-channel operation in the L-band, where it is particularly(More)
In this paper, an efficient and novel optical fiber-to-waveguide mode size converter for Si Photonics devices with sub-micron waveguides is developed on the SOI platform. This optical converter is composed of a suspended SiO(2) waveguide and overlapped Si nano-tapers located in the center of suspended SiO(2) waveguide. Laterally connected SiO(2) beams(More)