Open AccessLow threshold Fabry-Perot optofluidic resonator fabricated by femtosecond laser micromachining
Author(s) -
F. Simoni,
Silvio Bonfadini,
P. Spegni,
Sara Lo Turco,
D. E. Lucchetta,
Luigino Criante
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.017416
Subject(s) - materials science , laser linewidth , resonator , rhodamine 6g , laser , fabry–pérot interferometer , surface micromachining , optoelectronics , femtosecond , finesse , optics , fabrication , wavelength , medicine , physics , alternative medicine , pathology , fluorescence
We report the realization and characterization of an optofluidic microlaser based on a Fabry-Perot resonator fabricated by exploiting two direct writing fabrication techniques: the femtosecond laser micromachining and the inkjet printing technology. In this way a standard Fabry-Perot cavity has been integrated into an optofluidic chip. When using rhodamine 6G dissolved in ethanol at concentration of 5∙10 -3 mol/l, laser emission was detected at a threshold energy density of 1.8 μJ/mm 2 at least one order of magnitude lower than state-of-the-art optofluidic lasers. Linewidth below ~0.6 nm was measured under these conditions with a quality factor Q~10 3 . These performances and robustness of the device makes it an excellent candidate for biosensing, security and environment monitoring applications.