[19p-B6-1~18] 12.3 Functional Materials and Novel Devices

4:45 PM - 5:00 PM JST(7:45 AM - 8:00 AM UTC)

[19p-B6-13] Intracavity second-harmonic conversion of stimulated light emission in a polar liquid crystal

〇Daichi Okada^1,2, Hiroya Nishikawa², Fumito Araoka² (1.Kyoto Institute of Technology, 2.RIKEN)

Keywords:

Nonlinear optical effect,Polar Liquid Crystal,Optical microcavity

Coherent frequency conversion achieved through SHG is a significant optical phenomenon extensively applied in various fields such as bioimaging, biotherapy, optical signal processing, and optical communication. Optical cavity are well-established platforms known to enhance SHG characteristics. However, until now, evaluation of such a system has primarily focused on investigation of doubling the frequency of incident light from external laser sources. Therefore, in this study, we investigated the spontaneous SHG conversion properties of laser oscillation light generated inside an optical cavity by introducing polar nematic liquid crystal and laser dye into Fabry-pérot type cavity. As a result, the SHG efficiency of the intracavity up-conversion process is several hundred times higher than that of outside cavity without the laser oscillation process. Additionally, this approach realized remarkable features of giant SHG nonlinearity and multi-modal signal output that cannot be achieved conventional cavity based SHG system. Such a brand-new type of flexible up-conversion device must be promising for future optoelectronic devices.