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Direction- and polarization-tunable spontaneous emission beneficial from diffraction orders of a square R6G-nanopore
Shijia He1,2, Yi Wang1,2, Tianyu Wang2
1College of Physics and Optoelectronic Engineering, Harbin Engineering University 150001 Harbin China yi.wang@hrbeu.edu.cn wenxin.wang@hrbeu.edu.cn.
Nanoscale Advances
|June 29, 2023
Summary
This study demonstrates how to control light emission direction and polarization in two-dimensional photonic crystals by adjusting the unit cell size. This method enhances the design of nano-optics devices.
Area of Science:
- Photonics
- Materials Science
- Nanotechnology
Background:
- Two-dimensional photonic crystals (2D PCs) are crucial for miniaturizing micro-nano optical devices.
- Their optical properties are governed by lattice symmetry and unit cell design.
- Controlling light propagation in nano optics requires advanced manipulation techniques.
Purpose of the Study:
- To explore the manipulation of spontaneous emission (SE) from rhodamine 6G (R6G) using a square lattice of anodic aluminum oxide (AAO) membrane.
- To investigate the relationship between lattice diffraction orders (DOs) and the direction/polarization of light emission.
- To demonstrate extended tuning of light emission properties by modifying unit cell size.
Main Methods:
- Fabrication of a square lattice of anodic aluminum oxide (AAO) membrane.
- Incorporation of rhodamine 6G (R6G) dye into the AAO structure.
- Analysis of spontaneous emission (SE) patterns and polarization.
- Tuning of unit cell dimensions to modify diffraction orders (DOs).
Main Results:
- Observed directional and polarized light emission correlated with the diffraction orders (DOs) of the AAO lattice.
- Demonstrated successful overlap of different DOs with R6G emission by tuning unit cell size.
- Achieved extended tunability of emission direction and polarization.
Conclusions:
- The study highlights the significance of unit cell size in modulating far-field optical behaviors in 2D PCs.
- Findings are crucial for the design and application of advanced nano-optics devices.
- Lattice diffraction orders provide a pathway for controlling light emission properties.
