We demonstrate a large light absorptance (80%) in a nanometric layer of quantum dots in rods (QRs) with a thickness of 23 nm. This behavior is explained in terms of the coherent absorption by interference of the light incident at a certain angle onto the very thin QR layer. We exploit this coherent light absorption to enhance the photoluminescent emission from the QRs. Up to a seven- and fivefold enhancement of the photoluminescence is observed for p- and s-polarized incident light, respectively.

Phys. Rev. B

Pirruccio, G, Lozano, G, Zhang, Y, Rodriguez, S.R.K, Gomes, R, Hens, Z, & Gómez Rivas, J. (2012). Coherent absorption and enhanced photoluminescence in thin layers of nanorods. Phys. Rev. B, 85(16, Article number: 165455), 1–6. doi:10.1103/PhysRevB.85.165455