Özet
Numerical investigation of a Mach-Zehnder interferometer implemented by steering self-collimated acoustic beams in a two-dimensional phononic crystal is presented. Mirrors of the interferometer are optimized by modifying the radii of the steel cylinders in water so that the working frequencies lie in a band gap. The beam splitters optimized in a similar manner ensure equal splitting of the beams. In the all-water case of host liquid, the interferometer operates unidirectionally such that transmission through only one of the two output terminals is achieved. Corresponding transmittances are 85.9% and 6.0% for the transmitting and blocked terminals, respectively. The device can be utilized in sensing variations in the weight fraction of ethanol in water in a cell on the path of one of the two split beams. Phase difference accumulated in the sample cell varies linearly with ethanol weight fraction up to 15%. Contrast ratio of the calculated transmittances can be used as a measure of ethanol content in water, as it varies as a cosine function of ethanol weight fraction.
Orijinal dil | İngilizce |
---|---|
Sayfa (başlangıç-bitiş) | 197-203 |
Sayfa sayısı | 7 |
Dergi | Sensors and Actuators, B: Chemical |
Hacim | 203 |
DOI'lar | |
Yayın durumu | Yayınlanan - Kas 2014 |
Harici olarak yayınlandı | Evet |