Five-dimensional optical recording mediated by surface plasmons in gold nanorods

Area of Science:

• Materials Science
• Optics and Photonics
• Nanotechnology

Background:

• Multiplexed optical recording aims to increase information density beyond 1 Tbit cm(-3) by utilizing multiple dimensions for data storage.
• Existing methods using wavelength, polarization, and spatial dimensions lack integration and a recording medium with five-dimensional selectivity.
• A suitable medium is crucial for achieving orthogonality across wavelength, polarization, and three spatial domains.

Purpose of the Study:

• To demonstrate true five-dimensional (5D) optical recording by integrating multiple multiplexing dimensions.
• To overcome the limitations of current optical data storage technologies by enhancing information density.
• To present a novel recording medium and detection mechanism for high-fidelity data storage.

Main Methods:

• Exploiting the longitudinal surface plasmon resonance (SPR) of gold nanorods for wavelength and polarization sensitivity.
• Utilizing a photothermal recording mechanism with a distinct energy threshold for axial (depth) selectivity.
• Employing longitudinal SPR-mediated two-photon luminescence for enhanced, non-destructive readout.

Main Results:

• Achieved true five-dimensional optical recording by leveraging gold nanorod SPR properties.
• Demonstrated excellent wavelength and polarization sensitivity, coupled with axial selectivity.
• Enabled non-destructive, crosstalk-free readout via SPR-mediated two-photon luminescence with high cross-section.

Conclusions:

• The developed 5D optical recording technique significantly enhances information density.
• Gold nanorods provide a versatile platform for achieving high-dimensional optical data storage.
• This method holds promise for applications in optical patterning, encryption, and high-density data storage.