Journal
OPTICAL MATERIALS
Volume 130, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2022.112587
Keywords
Rare-earth doped chalcogenide materials; Photonic crystal microcavity; Spontaneous emission control
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Funding
- CNRS
- Universite de Rennes
- Chinese Scholarship Council of PR China
- European Union through the European Regional Development Fund (ERDF)
- Ministry of Higher Education and Research
- french region of Brittany and Rennes Metropole
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This article reports the fabrication of a one-dimensional photonic crystal microcavity using co-evaporation and its potential application in infrared fluorescence enhancement. The experimental results demonstrate a significant enhancement in emission intensity in this microcavity structure.
We report the fabrication of a one-dimensional photonic crystal microcavity via co-evaporation with electron beam/thermal evaporation process, which, to the best of our knowledge, is the first rare-earth doped onedimensional photonic crystal based on chalcogenide/fluoride thin films. The microcavity was made of a half wave dysprosium doped Ga(2)Se(3 )layer sandwiched between two embedded Ga2Se3/YF(3 )distributed Bragg reflectors. Near infrared transmittance spectra indicated that the stopband region from 1090 nm to 1515 nm was formed and a cavity resonance centered at 1342 nm. A cavity quality factor of 153 was achieved resulting in a 53 fold enhancement in spontaneous emission intensity. This photonic crystal microcavity configuration offers a new route to mid-wavelength and long-wavelength infrared fluorescence enhancement, which has attracted considerable interest for potential applications, such as fluorescence-based imaging and biomedical sensing.
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