Compact tunable microfluidic interferometer.
We demonstrate a compact tunable filter based on a novel microfluidic single beam Mach-Zehnder interferometer. The optical path difference occurs during propagation across a fluid-air interface (meniscus), the inherent mobility of which provides tunability. Optical losses are minimized by optimizing the meniscus shape through surface treatment. Optical spectra are compared to a 3D beam propagation method simulations and good agreement is found. Tunability, low insertion loss and strength of the resonance are well reproduced. The device performance displays a resonance depth of -28 dB and insertion loss maintained at -4 dB.
Grillet
Christian
C
Domachuk
P
P
Ta'eed
V
V
Mägi
E
E
Bolger
J
J
Eggleton
B
B
Rodd
L
L
Cooper-White
J
J