High-Performance Lossy-Mode Resonance Sensor Based on Few-Layer Black Phosphorus

Surface plasmon resonance (SPR) can be excited only by the transverse magnetic (TM)-polarized light in the conventional SPR sensor, whereas the lossy-mode resonance (LMR) can be achieved with both transverse electric (TE)- and TM-polarized lights. In this work, we propose a high-performance LMR sensor based on few-layer black phosphorus (BP), and the high quality factor (<i>Q</i>) of this BP-based LMR sensor for TE- and TM-polarized lights has been discussed. In comparison with that for the conventional SPR sensor, the <i>Q</i> factor for the proposed BP-based LMR sensor with both TE- and TM-polarized lights has been greatly improved. In particular, the highest <i>Q</i> factor as high as 2 × 10⁵ RIU^–1 can be obtained for the TM-polarized mode