Abstract
In this work, we propose a miniaturized optofluidic bio-sensor based on organic Rhodamine 6G optofluidic microbubble distributed Bragg reflector (R6G OMB DBR) laser and investigate its performance using a 3-D finite difference time domain (FDTD) simulation method. For this aim, lasing characteristics are precisely calculated and then exploited to scrutinize the capability of the proposed bio-laser in bio-sensing. The designed laser is pumped with a 532 nm Nd: YAG laser and operates at a wavelength of 561.1 nm. The threshold pump energy density and quality (Q)-factor of this single-mode microlaser are 3.6 μJ/mm2 and 4.28 × 104, respectively. The results declare that the presence of Polio virus-like-particles (VLPs) leads to a spectral redshift in the laser output wavelength while decreasing its output intensity. The obtained sensitivity and intensity sensitivity of the proposed bio-sensor are 1377 nm/RIU and 0.98 × 104%/RIU, respectively. Therefore, the proposed miniaturized device shows proper lasing characteristics as well as high abilities in real-time lab-on-a-chip (LOC) bio-sensing applications.
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