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Microsecond All-Optical Modulation by Biofunctionalized Porous Silicon Microcavity.

Dániel Petrovszki1,2, Sándor Valkai1, Lóránd Kelemen1

  • 1Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary.

Nanomaterials (Basel, Switzerland)
|July 29, 2023
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Summary
This summary is machine-generated.

Researchers developed a novel photonic device using porous silicon microcavities embedded with photoactive yellow protein (PYP). This integration enables light-induced changes, demonstrating potential for future optical applications.

Keywords:
optical modulationphotoactive yellow proteinphotocycleporous silicon

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Area of Science:

  • Materials Science
  • Biophotonics
  • Nanotechnology

Background:

  • Porous silicon (PSi) microcavities are versatile photonic structures.
  • Photoactive yellow protein (PYP) exhibits light-induced conformational changes.
  • Integrating biological molecules into photonic devices offers novel functionalities.

Purpose of the Study:

  • To create a composite photonic structure using PSi microcavities doped with PYP.
  • To demonstrate light-induced optical changes in the composite structure.
  • To investigate the incorporation of PYP into PSi and its effect on photonic properties.

Main Methods:

  • Fabrication of porous silicon microcavities.
  • Doping of microcavities with photoactive yellow protein (PYP).
  • Optical characterization including reflectance spectroscopy.
  • Model calculations for photonic properties.

Main Results:

  • Successful incorporation of PYP into PSi microcavities, evidenced by a 30 nm resonance dip shift.
  • Observation of light-induced reflectance changes corresponding to the PYP photocycle.
  • Model calculations confirmed consistency with PYP's nonlinear optical properties and estimated incorporation degree.

Conclusions:

  • A functional composite photonic device integrating PYP within PSi microcavities was successfully created.
  • The study provides a proof-of-concept for light-responsive photonic devices based on biomolecule-photonic crystal interactions.
  • Results suggest potential for future applications in optical sensing and light-controlled devices.