Compact, Energy-Efficient, and Low-Loss Thermo-Optic Silicon Optical Phase Shifter

We experimentally demonstrate a compact silicon optical phase shifter based on thermo-optic effect. The loss, power consumption, modulation bandwidth, and footprint are 0.77 dB, 3.1 mW/π, 38 kHz, and 45 × 45 µm2, respectively.