Laser ablated sub-wavelength structure anti-reflection coating on an alumina lens
Fuente:
arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866913897903030272 |
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| author | Hanany, Shaul Cray, Scott Dietterich, Samuel Dusing, Jan Firth, Calvin Koch, Jurgen Lam, Rex Matsumura, Tomotake Sakurai, Haruyuki Sakurai, Yuki Suzuki, Aritoki Takaku, Ryota Wen, Qi Wienke, Alexander Yan, Andrew Y. |
| author_facet | Hanany, Shaul Cray, Scott Dietterich, Samuel Dusing, Jan Firth, Calvin Koch, Jurgen Lam, Rex Matsumura, Tomotake Sakurai, Haruyuki Sakurai, Yuki Suzuki, Aritoki Takaku, Ryota Wen, Qi Wienke, Alexander Yan, Andrew Y. |
| contents | We used laser ablation to fabricate sub-wavelength structure anti-reflection coating (SWS-ARC) on a 5 cm diameter alumina lens. With an aspect ratio of 2.5, the SWS-ARC are designed to give a broad-band low reflectance response between 110 and 290 GHz. SWS shape measurements conducted on both sides of the lens give 303 $μ$m pitch and total height between 750 and 790 $μ$m, matching or exceeding the aspect ratio design values. Millimeter-wave transmittance measurements in a band between 140 and 260 GHz show the increase in transmittance expected with the ARC when compared to finite element analysis electromagnetic simulations. To our knowledge, this is the first demonstration of SWS-ARC on an alumina lens, opening the path for implementing the technique for larger diameter lenses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_13042 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Laser ablated sub-wavelength structure anti-reflection coating on an alumina lens Hanany, Shaul Cray, Scott Dietterich, Samuel Dusing, Jan Firth, Calvin Koch, Jurgen Lam, Rex Matsumura, Tomotake Sakurai, Haruyuki Sakurai, Yuki Suzuki, Aritoki Takaku, Ryota Wen, Qi Wienke, Alexander Yan, Andrew Y. Instrumentation and Methods for Astrophysics Optics We used laser ablation to fabricate sub-wavelength structure anti-reflection coating (SWS-ARC) on a 5 cm diameter alumina lens. With an aspect ratio of 2.5, the SWS-ARC are designed to give a broad-band low reflectance response between 110 and 290 GHz. SWS shape measurements conducted on both sides of the lens give 303 $μ$m pitch and total height between 750 and 790 $μ$m, matching or exceeding the aspect ratio design values. Millimeter-wave transmittance measurements in a band between 140 and 260 GHz show the increase in transmittance expected with the ARC when compared to finite element analysis electromagnetic simulations. To our knowledge, this is the first demonstration of SWS-ARC on an alumina lens, opening the path for implementing the technique for larger diameter lenses. |
| title | Laser ablated sub-wavelength structure anti-reflection coating on an alumina lens |
| topic | Instrumentation and Methods for Astrophysics Optics |
| url | https://arxiv.org/abs/2506.13042 |