Details

Autor(en) / Beteiligte

• Lee, Jun Ho
• Choi, Ju Hyeon
• Yi, Jeong Han
• Lee, Woo Hyung
• Lee, Eui Sam
• Choi, Yong Gyu

Titel

Unravelling interrelations between chemical composition and refractive index dispersion of infrared-transmitting chalcogenide glasses

Ist Teil von

• Scientific reports, 2018-10, Vol.8 (1), p.15482-10, Article 15482

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• A facile procedure for compositional screening of chalcogenide glass (CG) is proposed to manage its infrared transmission edge (ω ) as well as refractive index dispersion (ν) in the long-wavelength infrared (LWIR) range. Both ω and ν of CG turn out to be interpretable simply in connection with its chemical composition based on a postulation that CG behaves as a single average harmonic oscillator (SAHO). In this SAHO model, ω is expressed as a function of molar mass and average bond energy, both of which are easily accessible for a given CG composition. Two prototypical CG-forming systems in Ge-Sb-Se and Ge-Sb-S compositions exemplify the empirical compositional dependence of ω , which further plays a decisive role in determining ν. Following the present approach, a set of highly dispersive CG compositions in the Ge-Sb-S system is newly unveiled together with low-dispersion Ge-Sb-Se glasses. It is then experimentally demonstrated that a doublet lens configuration consisting of convex and concave lenses with low and high ν values, respectively, is able to reduce the optical aberrations. This finding presents an opportunity that ν can be envisaged just based on the compositional ratio of CG, thus facilitating completion of the LWIR Abbe diagram.