Since different tissues, cells or biochemicals have different (such as optical, thermal and acoustic) responses to different wavelengths of light, a light source with visible to near-infrared (NIR) multi-color output provides the fundamentals for multi-modal/multi-dimensional sensing/imaging. On the other hand, the polarization properties of light provide an opportunity for the analysis and processing of scattered light signals and can also help to obtain rich structural information in biological materials. In addition, single-mode micro-nano lasers meet the application requirements of miniaturized photonic devices with high information accuracy, avoiding false signals and overlapping interference of different optical signals, which have the potential to achieve targeted sensing/imaging of various cells and molecules when combined with multi-color output characteristics. If a material can combine the advantages of broadband multi-color output, polarization and single-mode micro-nano lasing, it is very useful for multi-mode miniaturized biochemical sensing or imaging, but there is no report of corresponding materials to date.
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Source: Phys.org