Modulating parallel photon avalanche in Ho³⁺ for multicolor nanoscopy and related applications

Area of Science:

• Nanotechnology
• Optical Imaging
• Materials Science

Background:

• Super-resolution imaging requires precise control over light emission.
• Holmium (Ho³⁺)-doped nanoparticles offer unique optical properties.
• Photon avalanche processes are crucial for luminescence enhancement.

Purpose of the Study:

• To tune the emissive chromaticity of Ho³⁺-doped nanoparticles.
• To achieve multicolor super-resolution imaging using a single excitation wavelength.
• To investigate the role of dual reservoir levels in photon avalanche dynamics.

Main Methods:

• Synthesis of Ho³⁺-doped nanoparticles with engineered dual reservoir levels.
• Characterization of photoluminescence properties under 965 nm continuous-wave (CW) excitation.
• Demonstration of multicolor super-resolution imaging capabilities.

Main Results:

• Successfully tuned the emissive chromaticity by manipulating dual reservoir levels.
• Achieved parallel photon avalanches enabling multicolor emission.
• Demonstrated multicolor super-resolution imaging with high resolution under 965 nm CW excitation.

Conclusions:

• Dual reservoir levels in Ho³⁺-doped nanoparticles provide a mechanism for chromaticity tuning.
• This approach enables efficient multicolor super-resolution imaging with a single excitation source.
• The findings open new avenues for advanced optical microscopy and bio-imaging.