We are developing planar lenslet arrays for millimeter-wavelength imaging using metamaterials microlithically fabricated using silicon wafers. We describe the design process for a gradient-index (GRIN) metamaterial lenslet using metal-mesh patterned on silicon and a combination of metal-mesh and etched-hole metamaterial anti-reflection layers. We optimize the design using a bulk-material model to rapidly simulate and iterate on the lenslet design. We fabricated prototype GRIN metamaterial lenslet array and mounted it on a Polarbear/Simons Array 90/150 GHz band transition edge sensor (TES) bolometer detector array with sinuous planar antennas. Beam measurements of a prototype lenslet array agree reasonably well with the model simulations. We plan to further optimize the design and combine it with a broadband anti-reflection coating to achieve operation over 70–350 GHz bandwidth. Applications include measurements of the Cosmic Microwave Background (CMB) and sub millimeter astrophysics.

Planar silicon metamaterial lenslet arrays for millimeter-wavelength imaging / Mckenney, Christopher; Austermann, Jason; Beall, James; Halverson, Nils; Hubmayr, Johannes; Jaehnig, Gregory; Pisano, Giampaolo; Stevenson, Sarah A.; Suzuki, Aritoki; Thompson, Jonathan A.. - (2020). (Intervento presentato al convegno SPIE ASTRONOMICAL TELESCOPES + INSTRUMENTATION tenutosi a Online Only, California, United States) [10.1117/12.2565532].

Planar silicon metamaterial lenslet arrays for millimeter-wavelength imaging

Giampaolo Pisano;
2020

Abstract

We are developing planar lenslet arrays for millimeter-wavelength imaging using metamaterials microlithically fabricated using silicon wafers. We describe the design process for a gradient-index (GRIN) metamaterial lenslet using metal-mesh patterned on silicon and a combination of metal-mesh and etched-hole metamaterial anti-reflection layers. We optimize the design using a bulk-material model to rapidly simulate and iterate on the lenslet design. We fabricated prototype GRIN metamaterial lenslet array and mounted it on a Polarbear/Simons Array 90/150 GHz band transition edge sensor (TES) bolometer detector array with sinuous planar antennas. Beam measurements of a prototype lenslet array agree reasonably well with the model simulations. We plan to further optimize the design and combine it with a broadband anti-reflection coating to achieve operation over 70–350 GHz bandwidth. Applications include measurements of the Cosmic Microwave Background (CMB) and sub millimeter astrophysics.
2020
SPIE ASTRONOMICAL TELESCOPES + INSTRUMENTATION
Metamaterials, lenslet arrays, millimeter waves
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Planar silicon metamaterial lenslet arrays for millimeter-wavelength imaging / Mckenney, Christopher; Austermann, Jason; Beall, James; Halverson, Nils; Hubmayr, Johannes; Jaehnig, Gregory; Pisano, Giampaolo; Stevenson, Sarah A.; Suzuki, Aritoki; Thompson, Jonathan A.. - (2020). (Intervento presentato al convegno SPIE ASTRONOMICAL TELESCOPES + INSTRUMENTATION tenutosi a Online Only, California, United States) [10.1117/12.2565532].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1476675
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