Publications by authors named "Buja F"
Waveguide-based absorption measurement system for visible wavelength applications.
Biomed Opt Express
April 2021
We present a miniaturized waveguide-based absorption measurement system operating at a wavelength of 635 nm, based on a silicon nitride integrated photonic platform, suitable for lab-on-chip applications. We experimentally demonstrate a high correlation between the bulk dye concentration and the measured absorption loss levels in the waveguides. We explain a photonic design process for choosing the ideal waveguide to minimize the coefficient of variation on the analyte concentration.
View Article and Find Full Text PDFClinical laboratory-based nucleic acid amplification tests (NAT) play an important role in diagnosing viral infections. However, laboratory infrastructure requirements and their failure to diagnose at the point-of-need (PON) limit their clinical utility in both resource-rich and -limited clinical settings. The development of fast and sensitive PON viral NAT may overcome these limitations.
View Article and Find Full Text PDFCompact wavelength splitters based on angled multimode interferometers (AMMIs) on silicon nitride platforms working in visible lights are reported for fluorescence sensing applications. A diplexer and triplexer with different footprints are designed and experimentally demonstrated. The diplexer and triplexer have the insertion loss of ∼1.
View Article and Find Full Text PDFArticle Synopsis
- This study explores the tribological properties of aluminum oxide (Al2O3) as a protective coating for the sidewalls of microelectromechanical systems (MEMS), demonstrating its effectiveness in reducing friction and adhesion.
- An advanced optical displacement measurement system provided high-resolution results, showing that uncoated polysilicon devices faced issues like stiction, which hindered movement and made tests non-reproducible.
- Despite some increase in adhesion over time due to moisture reactions, the overall low debris produced during friction tests highlights Al2O3's potential as an excellent protective coating in MEMS applications.
Background: The aim of this study was to evaluate the normal values of the most common indexes used in the analysis of ventricular late potential in 102 young male subjects.
Methods: The recordings were performed by means of a Marquette electronics Hi-Resolution ECG Mac 15, with filters at 25-250 Hz, 40-250 Hz and 80-250 Hz. The parameters obtained were: filtered QRS duration (QRSD), high-frequency low-amplitude signals duration (HFLA), and the root mean square of the signal expressed in the terminal portion of QRS (RMS).