Whispering gallery mode (WGM) resonators exhibit a high quality factor Q and a small mode volume; they usually exhibit high resolution when used as sensors. The light trapped inside a polymeric microcavity travels through total internal reflection generating the WGMs. A laser or a lamp is used to power the microlaser by using a laser dye embedded within the resonator. The excited fluorescence of the dye couples with the optical modes. The optical modes (laser modes) are seen as sharp peaks in the emission spectrum with the aid of an optical interferometer. The position of these optical modes is sensitive to any change in the morphology of the resonator. However, the laser threshold of these microlasers is of few hundreds of microjoules per square centimeter (fluence) usually. In addition, the excitation wavelength's light powering the device must be smaller than the microlasers size. When metallic nanoparticles are added to the microlaser, the excited surface plasmon couples with the emission spectrum of the laser dye. Therefore, the fluorescence of the dye can be enhanced by this coupling; this in turn, lowers the power threshold of the microlaser. Also, due to a plasmonic effect, it is possible to use smaller microlasers. In addition, a new sensing modality is enabled based on the variation of the optical modes' amplitude with the change in the morphology's microlaser. This opens a new avenue of low power consumption microlasers and photonics multiplexed biosensors.
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A Novel Microlaser-Based Plasmonic-Polymer Hybrid Resonator for Multiplexed Biosensing Applications
Maurizio Manzo,
Maurizio Manzo
Photonics Micro-Devices Fabrication Lab,
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
e-mail: maurizio.manzo@unt.edu
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
e-mail: maurizio.manzo@unt.edu
Search for other works by this author on:
Ryan Schwend
Ryan Schwend
Photonics Micro-Devices Fabrication Lab,
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
Search for other works by this author on:
Maurizio Manzo
Photonics Micro-Devices Fabrication Lab,
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
e-mail: maurizio.manzo@unt.edu
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
e-mail: maurizio.manzo@unt.edu
Ryan Schwend
Photonics Micro-Devices Fabrication Lab,
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
Department of Engineering Technology,
University of North Texas Discovery,
Park–3940 N. Elm St., F115,
Denton, TX 76207
1Corresponding author.
Manuscript received August 24, 2018; final manuscript received December 16, 2018; published online March 4, 2019. Assoc. Editor: Xun Yu.
ASME J of Medical Diagnostics. May 2019, 2(2): 021006 (6 pages)
Published Online: March 4, 2019
Article history
Received:
August 24, 2018
Revised:
December 16, 2018
Citation
Manzo, M., and Schwend, R. (March 4, 2019). "A Novel Microlaser-Based Plasmonic-Polymer Hybrid Resonator for Multiplexed Biosensing Applications." ASME. ASME J of Medical Diagnostics. May 2019; 2(2): 021006. https://doi.org/10.1115/1.4042377
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