Publications by authors named "Jesus Hernan Mendoza-Castro"
Article Synopsis
- - Laser-based mid-IR photothermal spectroscopy (PTS) is a rapid and sensitive analytical method that utilizes advanced laser technology to capture the absorption characteristics of various materials, such as liquids or solids.
- - This study utilizes an external cavity quantum cascade laser (EC-QCL) to analyze a thin film of polymethyl methacrylate (PMMA) on a silicon nitride micro-ring resonator, demonstrating its effectiveness in creating an on-chip photothermal sensor.
- - The research highlights the optimal alignment and focusing techniques for the laser setup, showing that PTS can lead to compact, efficient sensors suitable for real-time monitoring in industrial applications.
Silicon-based Micro Ring Resonators (MRR) are a powerful tool for the realization of label free optical biosensors. The sharp edge of a Fano resonance in a Silicon Nitride (SiN) platform can boost photonic sensing applications based on MRRs. In this work, we demonstrate enhanced Fano resonance features for a SiN Micro Ring Resonator assisted by a Photonic Crystal Nanobeam (PhCN-MRR) operating in the TM-like mode at the O-band wavelengths.
View Article and Find Full Text PDFIn this paper we show a novel design of high Q-factor silicon nitride (SiN) 1D photonic crystal (PhC) cavities side-coupled to curved waveguides, operating with both silica and air cladding. The engineering of the etched 1D PhC cavity sidewalls angle allows for high Q-factors over a wide range of upper cladding compositions, and the achievement of the highest calculated Q-factor for non-suspended asymmetric SiN PhC structures. We show the employment of these type of SiN PhC cavities in hybrid external cavity laser (HECL) configuration, with mode-hop free single mode laser operation over a broad range of injected currents (from 25 mA to 65 mA), milliwatts of power output (up to 9 mW) and side-mode suppression ratios in the range of 40 dB.
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