CUED Publications database

Optical microtube cavities monolithically integrated on photonic chips for optofluidic sensing.

Madani, A and Harazim, SM and Bolaños Quiñones, VA and Kleinert, M and Finn, A and Ghareh Naz, ES and Ma, L and Schmidt, OG (2017) Optical microtube cavities monolithically integrated on photonic chips for optofluidic sensing. Opt Lett, 42. pp. 486-489.

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Abstract

Microtubular optical resonators are monolithically integrated on photonic chips to demonstrate optofluidic functionality. Due to the compact subwavelength-thin tube wall and a well-defined nanogap between polymer photonic waveguides and the microtube, excellent optical coupling with extinction ratios up to 32 dB are observed in the telecommunication relevant wavelength range. For the first time, optofluidic applications of fully on-chip integrated microtubular systems are investigated both by filling the core of the microtube and by the microtube being covered by a liquid droplet. Total shifts over the full free spectral range are observed in response to the presence of the liquid medium in the vicinity of the microtube resonators. This work provides a vertical coupling scheme for optofluidic applications in monolithically integrated so-called "lab-in-a-tube" systems.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Cron Job
Date Deposited: 15 Nov 2019 20:09
Last Modified: 13 Apr 2021 07:06
DOI: 10.1364/OL.42.000486