Efficiency of multi-beam Fourier phase gratings at 1.4 THz

B. Mirzaei; J. R G Silva; Y. C. Luo; X. X. Liu; L. Wei; D. J. Hayton; J. R. Gao; Christopher Groppi

doi:10.1364/OE.25.006581

Efficiency of multi-beam Fourier phase gratings at 1.4 THz

B. Mirzaei, J. R G Silva, Y. C. Luo, X. X. Liu, L. Wei, D. J. Hayton, J. R. Gao, Christopher Groppi

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

We compare the results of simulated and measured power efficiency and far-field beam pattern, for two reflective Fourier phase gratings, designed to generate 2 x 2 and 2 x 4 beams respectively from a single-beam, coherent source at 1.4 THz. The designed surface structures were manufactured on aluminum plates by a computer numerical control (CNC) micro-milling machine. Despite small differences between the designed and fabricated gratings, we measured power efficiencies of both gratings to be around 70%, which is in a good agreement with the simulated values. We also find a good agreement between the simulated and measured diffracted beam size and spatial distribution. We demonstrate the application of both gratings as multiple beam local oscillators to simultaneously pump (or operate) a 4-pixel array of superconducting heterodyne mixers.

Original language	English (US)
Pages (from-to)	6581-6588
Number of pages	8
Journal	Optics Express
Volume	25
Issue number	6
DOIs	https://doi.org/10.1364/OE.25.006581
State	Published - Mar 20 2017

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.25.006581

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title = "Efficiency of multi-beam Fourier phase gratings at 1.4 THz",

abstract = "We compare the results of simulated and measured power efficiency and far-field beam pattern, for two reflective Fourier phase gratings, designed to generate 2 x 2 and 2 x 4 beams respectively from a single-beam, coherent source at 1.4 THz. The designed surface structures were manufactured on aluminum plates by a computer numerical control (CNC) micro-milling machine. Despite small differences between the designed and fabricated gratings, we measured power efficiencies of both gratings to be around 70%, which is in a good agreement with the simulated values. We also find a good agreement between the simulated and measured diffracted beam size and spatial distribution. We demonstrate the application of both gratings as multiple beam local oscillators to simultaneously pump (or operate) a 4-pixel array of superconducting heterodyne mixers.",

author = "B. Mirzaei and Silva, {J. R G} and Luo, {Y. C.} and Liu, {X. X.} and L. Wei and Hayton, {D. J.} and Gao, {J. R.} and Christopher Groppi",

note = "Funding Information: One of the authors (B. M.) acknowledges the support and encouragement from Leo Kouwenhoven. The authors would also like to thank Matt Underhill for fabricating the gratings, David Thoen for helping with the surface profile measurements, and Paul Urbach and Akira Endo for their helps and useful discussions. TU Delft Space Institute is acknowledged for financial support. Publisher Copyright: {\textcopyright} 2017 Optical Society of America.",

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doi = "10.1364/OE.25.006581",

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T1 - Efficiency of multi-beam Fourier phase gratings at 1.4 THz

AU - Mirzaei, B.

AU - Silva, J. R G

AU - Luo, Y. C.

AU - Liu, X. X.

AU - Wei, L.

AU - Hayton, D. J.

AU - Gao, J. R.

AU - Groppi, Christopher

N1 - Funding Information: One of the authors (B. M.) acknowledges the support and encouragement from Leo Kouwenhoven. The authors would also like to thank Matt Underhill for fabricating the gratings, David Thoen for helping with the surface profile measurements, and Paul Urbach and Akira Endo for their helps and useful discussions. TU Delft Space Institute is acknowledged for financial support. Publisher Copyright: © 2017 Optical Society of America.

PY - 2017/3/20

Y1 - 2017/3/20

N2 - We compare the results of simulated and measured power efficiency and far-field beam pattern, for two reflective Fourier phase gratings, designed to generate 2 x 2 and 2 x 4 beams respectively from a single-beam, coherent source at 1.4 THz. The designed surface structures were manufactured on aluminum plates by a computer numerical control (CNC) micro-milling machine. Despite small differences between the designed and fabricated gratings, we measured power efficiencies of both gratings to be around 70%, which is in a good agreement with the simulated values. We also find a good agreement between the simulated and measured diffracted beam size and spatial distribution. We demonstrate the application of both gratings as multiple beam local oscillators to simultaneously pump (or operate) a 4-pixel array of superconducting heterodyne mixers.

AB - We compare the results of simulated and measured power efficiency and far-field beam pattern, for two reflective Fourier phase gratings, designed to generate 2 x 2 and 2 x 4 beams respectively from a single-beam, coherent source at 1.4 THz. The designed surface structures were manufactured on aluminum plates by a computer numerical control (CNC) micro-milling machine. Despite small differences between the designed and fabricated gratings, we measured power efficiencies of both gratings to be around 70%, which is in a good agreement with the simulated values. We also find a good agreement between the simulated and measured diffracted beam size and spatial distribution. We demonstrate the application of both gratings as multiple beam local oscillators to simultaneously pump (or operate) a 4-pixel array of superconducting heterodyne mixers.

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Efficiency of multi-beam Fourier phase gratings at 1.4 THz

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