Fabrication of polymer microsphere-based whispering gallery mode microcavities of various sizes incorporating Ag-In-S quantum dots
Khorkina S. A.1, Tkach A. P. 1, Maleeva K. A. 1, Bogdanov K. V.1
1International research and educational center for physics of nanostructures, ITMO University, Saint-Petersburg, Russia
Email: kirw.bog@gmail.com

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The presented methodology describes the fabrication of active spherical microresonator structures with whispering gallery modes, based on polystyrene microspheres and AgInS2 quantum dots. These microresonators were obtained through electrostatic layer-by-layer deposition in aqueous suspensions. The ability to precisely tune the luminescent response of the active microresonators by adjusting the size of the polystyrene microsphere template is demonstrated. This size-dependent tunability of the optical properties makes these structures highly promising for integration into sensor devices, where optimized performance can be achieved through tailored resonator design. Keywords: whispering gallery modes, quantum dots, layer-by-layer deposition, microresonators.
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