Thermo-optic characteristic of DNA thin solid film and its application as a biocompatible optical fiber temperature sensor

Seongjin Hong, Woohyun Jung, Tavakol Nazari, Sanggwon Song, Taeoh Kim, Chai Quan, Kyunghwan Oh

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We report unique thermo-optical characteristics of DNA-Cetyl tri-methyl ammonium (DNA-CTMA) thin solid film with a large negative thermo-optical coefficient of -3.4 × 10-4/°C in the temperature range from 20°C to 70°C without any observable thermal hysteresis. By combining this thermo-optic DNA film and fiber optic multimode interference (MMI) device, we experimentally demonstrated a highly sensitive compact temperature sensor with a large spectral shift of 0.15 nm/°C. The fiber optic MMI device was a concatenated structure with single-mode fiber (SMF)-coreless silica fiber (CSF)-single mode fiber (SMF) and the DNA-CTMA film was deposited on the CSF. The spectral shifts of the device in experiments were compared with the beam propagation method, which showed a good agreement.

Original languageEnglish
Pages (from-to)1943-1945
Number of pages3
JournalOptics Letters
Volume42
Issue number10
DOIs
Publication statusPublished - 2017 May 15

Bibliographical note

Funding Information:
Yonsei University National Research Foundation of Korea (NRF) (NRF-2012M3A7B4049800). This work was supported in part by the Institute of Physics and Applied Physics, Yonsei University, in part by the Nano Material Technology Development Program through NRF funded by the MSIP.

Publisher Copyright:
© 2017 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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