Commercial infrared windows used for gas sensing in the mid-IR range usually possess an anti-reflective coating. Those coatings can normally not withstand harsh environments, particularly not high temperatures. With a simple “3-step” fabrication process, high temperature resistant silicon windows (∅1") were manufactured. The windows show high temperature resistant sub-wavelength anti-reflective surface microstructures on both side faces. Thus, a peak transmittance of 100% for a defined main wavelength (5 μm) and more than 90 % average transmittance for the wavelength range of 5-7 μm was achieved. The modeling of the anti-reflective microstructures, their fabrication process and final transmittance analysis of the windows is discussed.
|Title of host publication||Proceedings of 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS 2014)|
|Publication status||Published - 2014|
|Event||8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - DTU, Kgs. Lyngby, Denmark|
Duration: 25 Aug 2014 → 30 Aug 2014
Conference number: 8
|Conference||8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics|
|Period||25/08/2014 → 30/08/2014|