Principles of Circularly Polarized Luminescence

Materials that exhibit circularly polarized luminescence are currently being actively investigated for applications in fields such as liquid crystal display backlights, three-dimensional (3D) displays, holographic displays, light sources for controlling plant growth, and security systems for optical communications and printing. It is therefore important to identify molecules that emit one-handed circularly polarized light (CPL) with a high quantum yield.

CPL spectra contain important information such as the stable structure of excited molecules, and the behavior of these molecules in chemical reactions that involve an intermediate excited state. Generally, fluorescence signals from a sample are weak and CPL signals are even weaker, making them difficult to detect.

The JASCO CPL-300 achieves high sensitivity for detecting such weak CPL signals and allows measurements to be performed over a wide wavelength range.