Lecturer: Mr. Samuel Goldstein
Affiliation: Racah Institute of Physics,
The Hebrew University of Jerusalem
Abstract:
Macro-porous silicon photonic phase
gratings (P3G) were exploited for rapid
optical detection of bacteria. Sensing is
accomplished once bacteria are captured in
the pores, inducing a change in the optical
thickness (OT) of the pores. The OT is
monitored using the zero-order diffraction
of the reflected light and is analyzed via
Reflective Interferometric Fourier
Transform Spectroscopy (RIFTS). The
morphology and texture of the pores is
optimized for RIFTS to achieve optimal
transduction of the biological interaction.
Sensing experiments using a line of E. coli
cells demonstrate the detection capabilities
of the structure, where the entrapment
process was verified by confocal laser
scanning microscopy as well as high-
resolution scanning electron microscopy
(HRSEM).