研究目的
To demonstrate a universal approach for realizing dual-wavelength lasing in organic core-shell structured microlaser arrays for all-color laser display panels.
研究成果
The study successfully demonstrated a universal approach to the construction of core-shell heterostructure arrays capable of serving as all-color laser display panels. The core-shell arrays were controllably constructed by alternately printing hydrophilic and hydrophobic fluorescent organic binary laser dye solutions on preprocessed substrates. The core and shell separately function as WGM cavities, and dual-wavelength lasing was achieved in each heterostructure. A prototype of full-color laser displays was realized using the patterned core-shell heterostructure arrays as display panel.
研究不足
The technical and application constraints of the experiments include the difficulty in controlling the dimensions and morphologies of the heterostructures obtained by the self-assembly method, and the arrangement of the assembled heterostructures into regularly patterned arrays.
1：Experimental Design and Method Selection:
The core-shell heterostructures were fabricated based on microphase separation of hydrophilic shell and hydrophobic core by alternately printing two distinct laser dye solutions on preprocessed substrates.
2：Sample Selection and Data Sources:
Polystyrene (PS) and bovine serum albumin (BSA) were chosen as matrix materials to construct the core and shell segments, respectively. Two luminescent dyes, Rhodamine B (RhB, hydrophobic dye) and fluorescein disodium salt (uranin, hydrophilic dye), were adopted to provide optical gain.
3：List of Experimental Equipment and Materials:
A thin layer of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane was coated on the substrate surface to induce a hydrophobic effect.
4：Experimental Procedures and Operational Workflow:
The fabrication processes include imbibing the hydrophilic ink solution with a glass needle via capillary action, followed by spraying of a drop assisted by ultrasonic vibration onto a hydrophobic substrate.
5：Data Analysis Methods:
The mode spacing (?λ) of the laser outputted from the shell and core was analyzed to confirm the optical modulation based on the confinement of photons within the heterostructures.
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