Figure 7
From: Optofluidic vapor sensing with free-space coupled 2D photonic crystal slabs
Measured spectral shift of the resonant mode at various hexane and ethanol concentrations for the PCS coated with polymer of three different thicknesses: (a) Device #1 with 5 nm polymer; (b) Device #2 with 20 nm polymer; and (c) Device #3 with 54 nm polymer. (d) Sensitivity of the PCS to hexane and ethanol vapor with different polymer coating thicknesses.
