Fig. 3: Experiment characterization of hook nanoantennas sensing performance.
From: Wavelength-multiplexed hook nanoantennas for machine learning enabled mid-infrared spectroscopy
a, b The testing transmission (a) and reflection (b) spectra of hook nanoantenna devices with different ΔL for PMMA thin film sensing. The carbonyl stretching vibration in 5.76 μm or 1736 cm−1 is used to characterize the sensitivity of hook nanoantennas. The colors of the line refer to the different ΔL in e, f. c The extracted absorptive and radiative loss of hook nanoantennas by fitting the experimental spectra with TCMT. d, e The baselined corrected spectra difference in transmission(d) and reflection(e). f The calculated sensitivity of hook nanoantenna devices with different ΔL. The sphere symbols refer to reflection mode and square symbols represent transmission mode.
