It is not yet possible to fabricate micrometer-scale, glass optical components with nanometer-scale precision. Glass thermal imprinting enhances production efficiency. However, dimensional changes caused by shrinkage are inevitable because of phase transitions. Replication is very difficult when high-level pitch precision is essential. We used an infrared-transparent silicon mold and a CO2 laser to perform replica-type, thermal surface texturing at the nanoscale level; we analyzed a glass Fresnel zone plate array to this end. The Fresnel zone plate array was 10 × 10 mm2 in area and featured a 20 × 20 array. The individual Fresnel zone plate diameter was 500 μm and had 21 rings of minimum linewidth 2.9 μm and height 737 nm.
Bibliographical noteFunding Information:
National Research Foundation of Korea (2015R1A5A1037668); Ministry of Trade, Industry and Energy (N0002310).
© 2020 Optical Society of America.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics