Enhanced photoluminescence extraction efficiency from a diamond photonic crystal via leaky modes

Details Enhanced photoluminescence extraction efficiency from a diamond photonic crystal via leaky modes Enhanced photoluminescence extraction efficiency from a diamond photonic crystal via leaky modes

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13f3005o&link_type=abstract

New Journal of Physics, Volume 13, Issue 6, pp. 063005 (2011).

Physics

Scientific paper

Two-dimensional photonic crystal can be exploited as the top part of a light source in order to increase its extraction efficiency. Here, we report on the room-temperature intrinsic photoluminescence (PL) behavior of a nanocrystalline diamond (NCD) layer with diamond columns prepared on the top and periodically ordered into the lattice with square symmetry. Angle-resolved far-field measurements in the Γ-X crystal direction of broadband visible PL revealed up to six-fold enhancement of extraction efficiency as compared to a smooth NCD layer. A photonic band diagram above the lightcone derived from these measurements is in agreement with the diagram obtained from transmission measurements and simulation, suggesting that the enhancement is primarily due to light's coupling to leaky modes.

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