Mid-infrared imaging through up-conversion luminescence in trivalent lanthanide ion-doped self-organizing optical fiber array crystal

Marilou Cadatal-Raduban, Masao Yoshino, Yuui Yokota, Akira Yoshikawa, Norihiko Hayazawa, Daizo Asano, Keito Shinohara, Toshihiko Shimizu, Nobuhiko Sarukura, Kohei Yamanoi

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a scheme for imaging mid-infrared (MIR) wavelengths via pre-excitation-assisted up-conversion luminescence in lanthanide ion (Ln3+)-doped Self-organizing Optical FIber Array (SOFIA) crystal. First, near-infrared pre-excitation wavelength excites an electron from the ground state to an excited state of Ln3+. Next, the MIR wavelength to be imaged promotes this excited electron to a higher-lying energy state. Finally, relaxation of the electron from the higher-lying energy state to the ground state emits the up-conversion luminescence in the visible region, completing the MIR-to-visible wavelength conversion. An analysis of the 4 f to 4 f intra-configurational energy level transitions in Ln3+, together with an appropriate selection of the pre-excitation wavelength and the visible luminescence constrained within the 500–700 nm wavelength range, reveals that trivalent erbium (Er3+), thulium (Tm3+), holmium (Ho3+), and neodymium (Nd3+) can be used to image MIR wavelengths. Our proposed scheme, called MIR imAging through up-Conversion LuminEscence in a SOFIA crystal, will enable the imaging of MIR wavelengths using low-cost optics and readily available silicon-based detectors in the visible spectral region and will open up new possibilities for MIR wavelength detection and imaging.

Original languageEnglish
Pages (from-to)941-944
Number of pages4
JournalOptics Letters
Volume46
Issue number5
DOIs
Publication statusPublished - 2021 Mar 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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