Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

Area of Science:

• Photonics and Nanomaterials Science
• Materials Science and Engineering

Background:

• Photonic quasicrystals (PQCs) offer unique optical properties due to their non-periodic, rotationally symmetric structures.
• Integrating active materials like core/shell nanorods into PQCs enhances functionality for light-emitting applications.

Purpose of the Study:

• To propose and experimentally demonstrate a 2D octagonal photonic quasicrystal (PQC) composed of air rods in an organic/inorganic nanocomposite.
• To investigate the light-emitting properties and potential applications of this novel hybrid PQC structure.

Main Methods:

• Fabrication of the 2D octagonal PQC using electron beam lithography (EBL).
• Incorporation of CdSe/CdS core/shell nanorods into a polymer matrix to create the nanocomposite.
• Characterization using scanning electron microscopy, far-field diffraction, and spectral measurements.

Main Results:

• Successful experimental demonstration of the 2D octagonal PQC structure.
• Observation of efficient vertical light extraction via Bragg scattering, resulting in a narrow red emission band at 690 nm (FWHM of 21.5 nm).

Conclusions:

• The hybrid PQC material effectively combines the optical properties of inorganic nanorods with the processability of polymers.
• This technology holds significant potential for developing high-performance optical devices, including organic light-emitting diodes and lasers.