AI Article Synopsis
- Researchers achieved a ~3-fold increase in third-harmonic generation (THG) efficiency by using indium tin oxide (ITO) nanoparticles on ultra-high-Q silica microspheres.
- This enhancement is one of the largest reported in microcavity-based THG.
- The study involved numerical calculations to determine the optimal size and resonant modes of the microsphere while simplifying the application of ITO nanoparticles through a straightforward drop-casting technique.
Article Abstract
We report a ∼3-fold enhancement of third-harmonic generation (THG) conversion efficiency using indium tin oxide (ITO) nanoparticles on the surface of an ultra-high-Q silica microsphere. This is one of the largest microcavity-based THG enhancements reported. Phase-matching and spatial mode overlap are explored numerically to determine the microsphere radius (∼29 µm) and resonant mode numbers that maximize THG. Furthermore, the ITO nanoparticles are uniformly bonded to the cavity surface by drop-casting, eliminating the need for complex fabrication. The significant improvement in THG conversion efficiency establishes functionalized ITO microcavities as a promising tool for broadband frequency conversion, nonlinear enhancement, and applications in integrated photonics.
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| http://dx.doi.org/10.1364/OE.402527 | DOI Listing |
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