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Proton-Controlled Organic Microlaser Switch.

Zhenhua GaoWei ZhangYongli YanJun YiHaiyun DongKang WangJiannian YaoYong Sheng Zhao
Published in: ACS nano (2018)
Microscale laser switches have been playing irreplaceable roles in the development of photonic devices with high integration levels. However, it remains a challenge to switch the lasing wavelengths across a wide range due to relatively fixed energy bands in traditional semiconductors. Here, we report a strategy to switch the lasing wavelengths among multiple states based on a proton-controlled intramolecular charge-transfer (ICT) process in organic dye-doped flexible microsphere resonant cavities. The protonic acids can effectively bind onto the ICT molecules, which thus enhance the ICT strength of the dyes and lead to a red-shifted gain behavior. On this basis, the gain region was effectively modulated by using acids with different proton-donating ability, and as a result, laser switching among multiple wavelengths was achieved. The results will provide guidance for the rational design of miniaturized lasers with performances based on the characteristic of organic optoelectronic materials.
Keyphrases
  • high speed
  • water soluble
  • highly efficient
  • quantum dots
  • electron transfer
  • metal organic framework
  • high resolution
  • solid state