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Enhanced Light-Matter Interaction in Porous Silicon Microcavities Structurally Optimized Using Theoretical Simulation
Evelyn Granizo1, Irina S Kriukova1,2, Aleksandr A Knysh1,2
1Research Center Nano-Photon, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia.
Nanomaterials (Basel, Switzerland)
|December 10, 2025
Summary
Researchers developed advanced methods for fabricating porous silicon microcavities (pSiMCs) with enhanced light-matter interactions. This resulted in a twofold increase in quality factor (QF) and a 5.8-fold fluorescence spectrum narrowing for embedded R6G dye.
Area of Science:
- Optoelectronics and Photonics
- Materials Science
- Nanotechnology
Background:
- Optical microcavities are crucial for controlling material properties via light-matter interactions.
- Porous silicon microcavities (pSiMCs) offer advantages like tunable porosity and large surface area for optoelectronic and sensing applications.
- Precise fabrication of pSiMCs and achieving high quality factors (QF) remain significant challenges.
Purpose of the Study:
- To develop advanced, controlled fabrication methods for pSiMCs at room temperature.
- To enhance light-matter interactions in pSiMCs by improving structural parameters and quality factors.
- To demonstrate the improved performance of optimized pSiMCs in hybrid fluorescent structures.
Main Methods:
- Combining theoretical/numerical simulations with experimental validation for microcavity design.
- Implementing advanced protocols for controlled pSiMC fabrication at room temperature.
- Integrating R6G dye into optimized pSiMCs to create hybrid fluorescent structures.
Main Results:
- Achieved a twofold increase in the quality factor (QF) of pSiMCs, enhancing light confinement.
- Demonstrated a 5.8-fold narrowing of the R6G fluorescence spectrum in hybrid structures.
- Observed enhanced fluorescence signal due to increased spontaneous emission rate within the cavity.
Conclusions:
- The developed methodology enables precise theoretical simulation and fabrication of pSiMCs for specific applications.
- Optimized pSiMCs exhibit controllable optical properties, suitable for improved spectral resolution and luminescence efficiency.
- This work advances the potential of pSiMCs for innovations in photonic systems and optoelectronic devices.
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