Gradient refractive index chalcogenide lens for lightweight infrared dual-band imaging systems
In this study, we report the development of Ge<sub>15</sub>Se<sub>85-x</sub>Te<sub>x</sub> (GSTx) chalcogenide glass-based gradient refractive index (GRIN) lenses for lightweight dual-band infrared imaging systems. The GSTx glasses exhibit compatible thermal properties (Δ<i>T<sub>g</sub></i> < 9 °C), significant refractive index contrast (Δ<i>n</i> > 0.27), and high transmittance (> 57%). Through systematic dispersion characterization of GSTx glasses, we identify the GST0/GST25 pair as optimal glass sheets. The refractive index profile of the GRIN glass was quantitatively characterized by correlating Raman peak intensity ratios (Ge-Se/Se-Se bond vibrations) with the number of chemical bonds within the glass. Compared to a 4-element homogeneous system, the GRIN-incorporated design achieves 21.4% length reduction and 84.9% weight reduction. Providing a new full-chain solution for lightweight dual-band infrared imaging systems.
Authors
- Yongnian Guan
- Kelun Xia
- Zhengxiang Gu
- Shixun Dai (ORCID: https://orcid.org/0000-0001-5085-0933)
- Xunsi Wang (ORCID: https://orcid.org/0000-0002-4882-8363)
- Xiaohong Chen (ORCID: https://orcid.org/0000-0002-9797-8384)
- Xiang Shen (ORCID: https://orcid.org/0000-0002-8966-0325)
- Zijun Liu (ORCID: https://orcid.org/0000-0003-3928-0428)
- Senlin Yan
Institutions
- Advanced Materials and Devices (United States) (US)
- Institute of Oceanography
Publication Details
- Journal
- Optics Express
- Published
- 2025-10-29
- DOI
- https://doi.org/10.1364/oe.577730
- Primary Topic
- Phase-change materials and chalcogenides
- Type
- article
- Field-Weighted Citation Impact
- 0.00