Table 4.
Summary of characteristics of polymer-based PhC systems for strain sensing. (Note: a negative sign in the sensitivity is because an applied stress direction is perpendicular to a light propagation direction and these responses show relatively less sensitivity due to the Poisson's ratio effect.)
| PhC system | Max. strain, 
|
Peak shift [nm] | Sensitivity  [nm/%] |
Ref. |
|---|---|---|---|---|
| PMMA/air (3D inverse opal) | +57% Tensile | 545 → 475 | -2.2 | 313 |
| Silica spheres/poly(acrylamide) (3D opal) | -45% Compression | 800 → 450 | 7.8 | 311 |
| PS spheres/poly(2-methoxyethyl acrylate) (3D opal) | -15% Compression | 610 → 517 | 6.2 | 312 |
| PS spheres/PDMS (3D opal) | +20% Tensile | 590 → 560 | -1.5 | 315 |
| PS core/PMMA, PEA shells (3D opal) | +13% Tensile | 636 → 603 | -2.5 | 316 |
| PS spheres/PEA (3D opal) | +30% Tensile | 600 → 540 | -2.0 | 188 |
| PS-b-P2VP (1D lamellar) | -20% Compression | 760 → 520 | 12.0 | 236 |
| PU/Pebax (1D lamellar) | +125% Tensile | 600 → 410 | -1.5 | 151 |
| PSPI/PDMS (1D concentric) | +120% Tensile | 800 → 550 | -2.1 | 318 |
| Poly(dodecylglyceryl itaconate)/PAAm (1D lamellar) | -64% Compression | 600 → 415 | 2.9 | 319 |