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Slow-light enhanced absorption in liquid-infiltrated photonic crystals hasrecently been proposed as a route to compensate for the reduced optical path intypical lab-on-a-chip systems for bio-chemical sensing applications. A simpleperturbative expression has been applied to ideal structures composed oflossless dielectrics. In this work we study the enhancement in structurescomposed of lossy dielectrics such as a polymer. For this particular sensingapplication we find that the material loss has an unexpected limited drawbackand surprisingly, it may even add to increase the bandwidth for low-indexcontrast systems such as polymer devices.

Slow-light enhanced absorption for bio-chemical sensing applications: potential of low-contrast lossy materials