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Colloidal PbSe quantum dots (QDs) are site-selectively bound to silicon-based L3 photonic crystal cavities through a robust process consisting of AFM-lithography and surface chemistry techniques. High-contrast cavity-mode emission is observed, indicating good cavity-QDs coupling.
Silica and zirconium dioxide sol-gel thin films made with Yb0.80La0.15Tb0.05F3 or Yb 0.80La0.15Eu0.05F3 nanoparticles are reported. Bright blue (413 and 435 nm), green (545 nm), and red (585 and 625 nm) emissions are produced from Tb3+ ions through cooperative up-conversion of 980 nm light. Similarly, red (591 and 612 nm) emission is generated from Eu3+ ions. These up-convertors may find use in white...
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