High quality factor polymeric Fabry-Perot resonators utilizing a polymer waveguide

Mohammad Amin Tadayon, Martha Elizabeth Baylor, Shai Ashkenazi

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Optical resonators are used in a variety of applications ranging from sensors to lasers and signal routing in high volume communication networks. Achieving a high quality (Q) factor is necessary for higher sensitivity in sensing applications and for narrow linewidth light emission in most lasing applications. In this work, we propose a new approach to achieve a very high Q-factor in polymeric Fabry-Perot resonators by conquering light diffraction inside the optical cavity. This can be achieved by inducing a refractive index feature inside the optical cavity that simply creates a waveguide between the two mirrors. This approach eliminates diffraction loss from the cavity and therefore the Q-factor is only limited by mirror loss and absorption. To demonstrate this claim, a device has been fabricated consisting of two dielectric Bragg reflectors with a 100 μm layer of photosensitive polymer between them. The refractive index of this polymer can be modified utilizing standard photo-lithography processes. The measured finesse of the fabricated device was 692 and the Q-factor was 55000.

Original languageEnglish (US)
Pages (from-to)5904-5912
Number of pages9
JournalOptics Express
Volume22
Issue number5
DOIs
StatePublished - Mar 10 2014

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