Organic microresonators are highly attractive for numerous applications including biosensing, optical switching and metrology. Adding chiral materials to resonators can enhance their sensing properties due to the appearance of chiroptical effects. Here we study experimentally resonant multiphoton processes in spherical microresonators with the diameter of 2–12 ##IMG## [http://ej.iop.org/images/1612-202X/17/3/036201/lplab65c0ieqn001.gif] m made of 1,1’-bi-2-naphthol derivatives by a self-assembly technique. Using nonlinear single-particle microscopy, we demonstrate that these microspheres provide excitation of whispering gallery modes (WGMs) in two- and three-photon excited luminescence with a Q-factor of up to 300. We also demonstrate that the nonlinear circular dichroism is enhanced due to the WGM excitation and reaches 7.7% and 11% in the two- and three-photon absorption, respectively. Pronounced modulation of the WGMs spectrum due to the mode’s splitti...

中文翻译：

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通过自组装技术制备的多光子激发的耳语画廊模式微谐振器的手性驱动效应

有机微谐振器在包括生物传感，光学开关和计量学在内的众多应用中具有很高的吸引力。由于手性效应的出现，将手性材料添加到谐振器可以增强其感应特性。在这里，我们研究了直径2–12 ## IMG ##的球形微谐振器中的实验谐振多光子过程[http://ej.iop.org/images/1612-202X/17/3/036201/lplab65c0ieqn001.gif] m通过自组装技术由1,1'-联-2-萘酚衍生物制成。使用非线性单粒子显微镜，我们证明了这些微球在Q和300的Q因子下在两光子和三光子激发的发光中提供了回音壁模式（WGM）的激发。我们还证明了非线性圆二色性得到了增强由于WGM激发而达到7。两光子和三光子的吸收分别为7％和11％。WGMs频谱的明显调制由于该模式的分离而引起。