Influence of diamond-like carbon overlay properties on refractive index sensitivity of nano-coated optical fibres

Mateusz Jakub Śmietana , Dariusz Dudek , Marcin Koba , Bartosz Michalak


An application of diamond-like carbon (DLC) nano-coated optical fibre as a promising platform for external medium refractive index (RI) sensing is investigated. The DLC thin films are deposited by radio frequency plasma enhanced chemical vapour deposition (RF PECVD) on fused-silica core (Ø = 400 µm) of multimode polymer-clad silica (PCS) optical fibres. The optical fibre sensor response to variations of the external RI for samples coated with DLC film for various thickness and optical properties of the film is measured, and compared to numerical simulations. We show that both optical properties and thickness of the DLC films depend on the deposition time. The effect has a strong impact on the optical response of the samples to variations of the external RI. The response is mainly influenced by the thickness and RI of the DLC overlay. Moreover, the response also depends on the investigated wavelength range. We show that for intensity-based configuration at λ ∼ 490 nm, the DLC film thickness should reach about 80 nm. In such a configuration the sensitivity reaches over 2000% per RI unit (RIU). For wavelength-based configuration, when shift of the intensity deep at λ ∼ 490 nm is considered, the thickness of the film should be as high as 120 nm. In such a configuration the sensitivity reaches 250 nm RIU−1.
Author Mateusz Jakub Śmietana (FEIT / MO)
Mateusz Jakub Śmietana,,
- The Institute of Microelectronics and Optoelectronics
, Dariusz Dudek
Dariusz Dudek,,
, Marcin Koba - [Instytut Łączności PIB (IŁ PIB)]
Marcin Koba,,
- Instytut Łączności PIB
, Bartosz Michalak (CAMT)
Bartosz Michalak,,
- The Centre for Advanced Materials and Technologies
Corporate authorInstitute of Microelectronics and Optoelectronisc (IMiO)
Journal seriesPhysica Status Solidi A-Applications and Materials Science, ISSN 1862-6300, [1862-6319]
Issue year2013
Publication size in sheets0.5
Keywords in Englishdiamond-like carbon;optical fibre sensors;optical properties;refractive index sensing;RF PECVD;thin film
ASJC Classification2208 Electrical and Electronic Engineering; 2504 Electronic, Optical and Magnetic Materials; 2505 Materials Chemistry; 2508 Surfaces, Coatings and Films; 3104 Condensed Matter Physics; 3110 Surfaces and Interfaces
Languageen angielski
Score (nominal)25
Score sourcejournalList
ScoreMinisterial score = 25.0, 08-07-2020, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 08-07-2020, ArticleFromJournal
Publication indicators Scopus Citations = 25; WoS Citations = 21; GS Citations = 24.0; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 0.901; WoS Impact Factor: 2013 = 1.525 (2) - 2013=1.476 (5)
Citation count*26 (2020-09-22)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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