Fig. 4: Polarization imaging of microwave standing waves with subwavelength spatial resolution. | Communications Physics

Fig. 4: Polarization imaging of microwave standing waves with subwavelength spatial resolution.

From: All-optical polarization-filtered subwavelength imaging in microwave regime via atom-based polarization holography

Fig. 4

a Holographic AM signals are obtained by detecting the diffracted probe field at the frequency of 57 kHz using the photodetector. Inset: light intensity distribution of the diffracted field of APH is measured with the CMOS camera. b All-optical APH imaging of MW standing wave characterized by nodes and antinodes with spatial resolution of 500 μm. The Poincaré sphere on the right indicates the polarization state of MW (χ = 90°). c Polarization imaging for 45° linearly polarized MW (χ = 45°). As the polarization state of MW varies, the diffraction of APH is regulated, leading to the modulation of imaging. d When MW is controlled to horizontally polarized (χ = 0°), the holographic AM signal at each pixel point reaches the minimum value compared with (b) and (c). e Detected standing wave formed by right-handed circularly polarized MW. Error bars in b–e denote the standard error obtained from 10 measurements.

Back to article page