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Dokument Type: Article
metadata.dc.title: High-speed focus-induced photoresponse in amorphous silicon photodetectors for optical distance measurements
Authors: Bablich, Andreas 
Müller, Maurice  
Kienitz, Paul 
Bornemann, Rainer 
Haring Bolívar, Peter 
Institute: Department Elektrotechnik - Informatik 
Free keywords: 3D imaging sensors, 3D-Bildsensoren
Dewey Decimal Classification: 621.3 Elektrotechnik, Elektronik
Issue Date: 2022
Publish Date: 2023
Source: Electronics Letters ; 58 (8), S. 330–332. -
The Focus-Induced Photoresponse (FIP) enables 3D sensing capabilities by evaluating the irradiance dependent non-linear detector response in defect-based materials. Since this advantage is intricately associated to a slow response, the electrical bandwidth of previous FIP sensors is limited to a few kHz only. We report the FIP in amorphous silicon pin photodiodes and propose a sensor read out based on a harmonics analyses. We achieve modulation frequencies of 500 kHz and a non-linear beat frequency detection up to at least 3.5 MHz, surpassing the bandwidth of state-of-the-art architectures by at least a factor of 175. The FIP sensors further achieve signal-to-noise ratios of ∼50 dB, depth resolutions of at least 5.4 mm at 126 cm and a DC FIP detection limit of 1.3 μW/mm2.
Finanziert im Rahmen der DEAL-Verträge durch die Universitätsbibliothek Siegen
URN: urn:nbn:de:hbz:467-25217
Appears in Collections:Geförderte Open-Access-Publikationen

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