[15p-S4_201-1~12] 3.14 Optics and Photonics English Session

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[15p-S4_201-4] Fluorescent Emission Modulation via Cavity Mode Resonance in Cathodoluminescence

〇(M2)Kanto Maeda¹, Izzah Machfuudzoh¹, Sotatsu Yanagimoto¹, Takumi Sannomiya¹ (1.Science Tokyo)

Keywords:

Cathodoluminescence,Purcell effect,Dielectric

Cathodoluminescence (CL) from nitrogen-vacancy (NV) centers in nanodiamonds and oxygen-vacancy (OV) defects in titanium dioxide nanoparticles, both of which are promising candidates as solid-state quantum emitters. The nanoparticles of a size comparable to the wavelength of light can additionally act as dielectric optical cavity, allowing their size and geometry to influence cavity mode resonance. Using cathodoluminescence (CL) spectroscopy, spatially resolved emission mapping was performed. Polarized CL mappings revealed enhanced CL intensity at particle edges in the corresponding cavity mode resonant wavelength, allowing for imaging of the dipole field pattern. Coupling between defect emission and cavity mode emission was identified in both materials. These findings demonstrate that cavity mode resonance can modulate emission characteristics, such as Purcell effect induced lifetime.