Dynamic optical encoding of morse code based on color-spatial dual-dimensional multiplexing using multicolor mechanoluminescence

Multicolor ML encoder enables color-spatial dual-dimensional optical encoding. • Encodes 54 color-coded Morse characters, dramatically increasing data density. • Volatile ML emission offers transient information protection. Mechanoluminescent (ML) materials, which emit light under mechanical stress, offer a unique platform for dynamic optical signaling. However, expanding the information capacity of ML encoding systems traditionally requires enlarging physical device footprints into complex 2D arrays. This work introduces a multicolor ML encoder based on color-spatial dual-dimensional multiplexing. Using the single-host CaZnOS ML materials with distinct activator ions (Ho 3 + , Mn 2+ , and Eu 3+ ), an 8 × 1 linear array encoder translates mechanical writing strokes into unique chromatic sequences under pure mechanical stimulation. The system successfully supports a rich character library of 54 distinct Morse characters within a simple linear footprint by integrating chromatic sequences with Morse code logic across spatial bit channels. This work provides a practical strategy for optical information encoding that does not rely on intricate device geometries. Download: Download high-res image (219KB) Download: Download full-size image