Video-speed detection of the absolute position of a light point on a large-area photodetector based on luminescent waveguides

Abstract

A large-area photosensor is presented that uses the coupling of light into the planar waveguide mode of a polycarbonate foil by luminescent dyes to extend the active area of silicon photodiodes attached to the surface of the foil in a regular pattern. The photodiode signal is directly related to the distance between the point where light is coupled into the foil and the photodiode, thus enabling a precise recovery of the position of a localized light signal hitting the foil. We present a large-area device that can trace the movement of a light point generated by a laser pointer hitting its surface.

A Broadband Fluorographene Photodetector

“…In addition, two‐color intelligent detection and recognition has also been under extensive investigation. For instance, UV–vis photodetectors can meet the demands on astronomical detection, wide spectral switches, or memory storage; vis and near‐infrared (IR) photodetectors are widely used in consumer electronics, video recording, and remote sensing; multiband mid‐IR photodetectors have attracted interest due to their numerous exciting applications, such as in surveillance, medical diagnostics, bioimaging, and navigational aids …”

The Hidden Potential of Luminescent Solar Concentrators

“…[ 120 ] Following that, a video rate (250 kS s −1 ), large size (20 cm × 20 cm) position sensor with mean error deviation of 3 mm was demonstrated by using Bayer Makrofol RED polycarbonate LC films and 12 surface mount diodes. [ 121 ] Replacing the polycarbonate foil with PDMS doped with Pyrromethene 597 enabled the fabrication of a fully flexible sensor, Figure 14 a, which could also perform under a 15% strain with an average deviation of 1.36 mm for a 4 cm × 4 cm device. [ 122 ] Finally, an alternative approach followed in which the inherent red‐shifting of trapped light due to reabsorption inside the LSC was used instead of intensity measurements, Figure 14b.…”

P‐196: Adding Interactivity to Displays Using the Q‐Foil Technology

“…isiQiri interface technologies has developed a novel technological platform called Q-Foil that allows for a cost-efficient and simple fabrication of large areas of optical sensors being flexible, thin and adaptable to nearly any shape. This is done by a combination of miniature silicon photodiodes with an optically active plastic foil using mostly parts and production methods common to existing industrial standards [1,2].…”