Fig. 5: Demonstration experiment for 3D ODS with wavelength/intensity multiplexing. | Light: Science & Applications

Fig. 5: Demonstration experiment for 3D ODS with wavelength/intensity multiplexing.

From: High-security-level multi-dimensional optical storage medium: nanostructured glass embedded with LiGa5O8: Mn2+ with photostimulated luminescence

Fig. 5

a Schematic illustration of the multilayer TGC-configured ODS medium and the write-in/readout process for optical information. b The 3D optical data readout using an 808 nm NIR laser (power density: 1.3 W/mm2) to show the encoded ‘C’, ‘A’ and ‘S’ of the binary system (the photos are taken through a 750 nm short-pass filter). c The 3D optical readout of the encoded images of Einstein in different layers with the aid of heat (150 °C). d Wavelength multiplexing by combining four TGC species with various heat treatment times into one system, where the multicolour-encoded Chinese characters with the meaning of ‘good fortunes’, English characters, and QR code can be read out by heating. e Demonstration of the intensity multiplexing by varying the input UV irradiation power. Note: the time lags set to take photographs are 3 s for heating and 1 s for turning on the 808 nm laser

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