Publications by authors named "Zhengrui Tu"
Article Synopsis
- - The study focuses on erbium-doped integrated waveguide devices, which are promising for optical amplification in silicon photonics but currently lack maturity as competitive industry components.
- - There's a pressing need for more affordable and efficient infrared active materials that work well with CMOS technology and can be produced in large quantities.
- - The authors introduce a new, simple fabrication method for creating cost-effective erbium-doped waveguide amplifiers, showing successful optical gain in short waveguide channels using an existing industrial platform.
Article Synopsis
- Compact silicon integrated lasers are being researched for their potential applications, specifically targeting sub-mm long structures that emit light at a wavelength of 1.533 µm.
- The study combines a multi-segment silicon waveguide design with a new technique for depositing erbium-doped thin films to achieve efficient lasing.
- It suggests that using quarter-wave shifted distributed feedback (QWS-DFB) structures can lead to compact (< 500 µm) on-chip lasers that operate effectively under low optical pumping powers.
High-sensitivity complex refractive index sensing is proposed and experimentally demonstrated, favoring with sharp Fano resonance at 1550 nm wavelength based on subwavelength grating waveguide (SWG) micro-ring resonator. The micro-ring is composed by trapezoidal silicon pillars with subwavelength period to enhance the light-analyte overlap and get high quality factor as well. One straight SWG waveguide is side coupled with the micro-ring, which is specially designed to produce partial Fabry-Perot (FP) effect.
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