Variable Optical Attenuator Based on Long-Range Surface Plasmon Polariton Multimode Interference Coupler
Figure 7
The intensity distribution of fundamental LRSPP mode at 1.55 μm captured by IR camera with different electrical driving power of (a) 0 mW, (b) 6 mW, (c) 29 mW, (d) 53 mW, (e) 60 mW, and (f) 66 mW applied on the heater.
