PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
We present the development of Ge-on-Si waveguide-based devices for low-noise mid-infrared absorption spectroscopy of aqueous solutions, targeting wavelengths between 6 and 10 μm, that are able to reduce the relative intensity noise which is a key roadblock when measuring tiny analyte absorptions masked by a large background matrix absorption. The sensor uses a pair of integrated thermo-optic switches to continuously switch light between a reference waveguide and a sensor waveguide, so that common noise components can be cancelled out, even when the light source and photodetector are not integrated on the same chip.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
M. Nedeljkovic, C. Stirling, D. J. Rowe, M. Banakar, Y. Qi, X. Yan, C. G. Littlejohns, G. Z. Mashanovich, "Ge-on-Si waveguide device for self-referenced fingerprint region absorption spectroscopy," Proc. SPIE 12426, Silicon Photonics XVIII, 124260I (13 March 2023); https://doi.org/10.1117/12.2650469