TY  - JOUR
Y1  - 2022/05/15/
N2  - Visible-light integrated photonics is emerging as a promising technology for the realization of optical devices for applications in sensing, quantum information and communications, imaging, and displays. Among the existing photonic platforms, high-index-contrast silicon nitride (Si3N4) waveguides offer broadband transparency in the visible spectral range and a high scale of integration. As the complexity of photonic integrated circuits (PICs) increases, on-chip detectors are required to monitor their working point for reconfiguration and stabilization operations. In this Letter, we present a semi-transparent in-line power monitor integrated on Si3N4 waveguides that operates in the red-light wavelength range (660 nm). The proposed device exploits the photoconductivity of a hydrogenated amorphous-silicon (a-Si:H) film that is evanescently coupled to an optical waveguide. Experimental results show a responsivity of 30 mA/W, a sensitivity of ?45 dBm, and a sub-µs time response. These features enable the use of the proposed photoconductor for high-sensitivity monitoring and control of visible-light Si3N4 PICs.
AV  - public
VL  - 47
SN  - 0146-9592
IS  - 10
EP  - 2601
SP  - 2598
TI  - Amorphous-silicon visible-light detector integrated on silicon nitride waveguides
PB  - Optical Society of America
A1  - De Vita, Christian
A1  - Toso, Fabio
A1  - Pruiti, Natale G.
A1  - Klitis, Charalambos
A1  - Ferrari, Giorgio
A1  - Sorel, Marc
A1  - Melloni, Andrea
A1  - Morichetti, Francesco
ID  - enlighten275116
UR  - https://eprints.gla.ac.uk/275116/
JF  - Optics Letters
ER  -