Table 3 Comparison between grating types
From: Nano-imprinted subwavelength gratings as polarizing beamsplitters
Grating type | η0 | η1 | η−1 |
|---|---|---|---|
Amplitude grating (f =0.5) (theoretically) | 25% | 2.5% | 2.5% |
Hybrid subwavelength grating (theoretically) | 57.7% | 15.9% | 15.9% |
Hybrid subwavelength grating (experimentally) | 49.0+5.2−4.7% | 6.4+0.9−0.4% | 4.9+0.7−0.3% |