Metamaterial-based octave-wide terahertz bandpass filters
We present octave-wide bandpass filters in the terahertz (THz) region based on bilayer-metamaterial (BLMM) structures. The passband region has a super-Gaussian shape with a maximum transmittance approaching 70% and a typical stopband rejection of 20 dB. The design is based on a metasurface consistin...
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creator | Maleki, Ali Singh, Avinash Jaber, Ahmed Cui, Wei Xin, Yongbao Sullivan, Brian T Boyd, Robert W Menard, Jean-Michel |
description | We present octave-wide bandpass filters in the terahertz (THz) region based
on bilayer-metamaterial (BLMM) structures. The passband region has a
super-Gaussian shape with a maximum transmittance approaching 70% and a typical
stopband rejection of 20 dB. The design is based on a metasurface consisting of
a metallic square-hole array deposited on a transparent polymer, which is
stacked on top of an identical metasurface with a sub-wavelength separation.
The superimposed metasurface structures were designed using finite-difference
time-domain (FDTD) simulations and fabricated using a photolithography process.
Experimental characterization of these structures between 0.3 to 5.8 THz is
performed with a time-domain THz spectroscopy system. Good agreement between
experiment and simulation results is observed. We also demonstrate that two
superimposed BLMM (2BLMM) devices increase the steepness of the roll-offs to
more than 85 dB/octave and enable a superior stopband rejection approaching 40
dB while the maximum transmittance remains above 64%. This work paves the way
toward new THz applications, including the detection of THz pulses centered at
specific frequencies, and an enhanced time-resolved detection sensitivity
towards molecular vibrations that are noise dominated by a strong,
off-resonant, driving field. |
doi_str_mv | 10.48550/arxiv.2208.08434 |
format | Article |
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on bilayer-metamaterial (BLMM) structures. The passband region has a
super-Gaussian shape with a maximum transmittance approaching 70% and a typical
stopband rejection of 20 dB. The design is based on a metasurface consisting of
a metallic square-hole array deposited on a transparent polymer, which is
stacked on top of an identical metasurface with a sub-wavelength separation.
The superimposed metasurface structures were designed using finite-difference
time-domain (FDTD) simulations and fabricated using a photolithography process.
Experimental characterization of these structures between 0.3 to 5.8 THz is
performed with a time-domain THz spectroscopy system. Good agreement between
experiment and simulation results is observed. We also demonstrate that two
superimposed BLMM (2BLMM) devices increase the steepness of the roll-offs to
more than 85 dB/octave and enable a superior stopband rejection approaching 40
dB while the maximum transmittance remains above 64%. This work paves the way
toward new THz applications, including the detection of THz pulses centered at
specific frequencies, and an enhanced time-resolved detection sensitivity
towards molecular vibrations that are noise dominated by a strong,
off-resonant, driving field.</description><identifier>DOI: 10.48550/arxiv.2208.08434</identifier><language>eng</language><subject>Physics - Optics</subject><creationdate>2022-08</creationdate><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2208.08434$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2208.08434$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Maleki, Ali</creatorcontrib><creatorcontrib>Singh, Avinash</creatorcontrib><creatorcontrib>Jaber, Ahmed</creatorcontrib><creatorcontrib>Cui, Wei</creatorcontrib><creatorcontrib>Xin, Yongbao</creatorcontrib><creatorcontrib>Sullivan, Brian T</creatorcontrib><creatorcontrib>Boyd, Robert W</creatorcontrib><creatorcontrib>Menard, Jean-Michel</creatorcontrib><title>Metamaterial-based octave-wide terahertz bandpass filters</title><description>We present octave-wide bandpass filters in the terahertz (THz) region based
on bilayer-metamaterial (BLMM) structures. The passband region has a
super-Gaussian shape with a maximum transmittance approaching 70% and a typical
stopband rejection of 20 dB. The design is based on a metasurface consisting of
a metallic square-hole array deposited on a transparent polymer, which is
stacked on top of an identical metasurface with a sub-wavelength separation.
The superimposed metasurface structures were designed using finite-difference
time-domain (FDTD) simulations and fabricated using a photolithography process.
Experimental characterization of these structures between 0.3 to 5.8 THz is
performed with a time-domain THz spectroscopy system. Good agreement between
experiment and simulation results is observed. We also demonstrate that two
superimposed BLMM (2BLMM) devices increase the steepness of the roll-offs to
more than 85 dB/octave and enable a superior stopband rejection approaching 40
dB while the maximum transmittance remains above 64%. This work paves the way
toward new THz applications, including the detection of THz pulses centered at
specific frequencies, and an enhanced time-resolved detection sensitivity
towards molecular vibrations that are noise dominated by a strong,
off-resonant, driving field.</description><subject>Physics - Optics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotj81qAjEUhbPpolgfoCvnBTLemSSTZCliq2Bx4364SW5oYKySDPbn6f3r6sA58HE-xl4bqKVRCuaYf9K5blswNRgp5DOzHzTiAUfKCQfusFCojn7EM_HvFKi6DvhJefyrHH6FE5ZSxTRc2_LCniIOhab_OWH7t9V-uebb3ftmudhy7LTkZH2QgNobH5WN5ERsyLQobXRgnLUA3irUrmsUCNWZRvvYRSCrg8dWiAmbPbD37_0ppwPm3_7m0N8dxAVtr0Ir</recordid><startdate>20220817</startdate><enddate>20220817</enddate><creator>Maleki, Ali</creator><creator>Singh, Avinash</creator><creator>Jaber, Ahmed</creator><creator>Cui, Wei</creator><creator>Xin, Yongbao</creator><creator>Sullivan, Brian T</creator><creator>Boyd, Robert W</creator><creator>Menard, Jean-Michel</creator><scope>GOX</scope></search><sort><creationdate>20220817</creationdate><title>Metamaterial-based octave-wide terahertz bandpass filters</title><author>Maleki, Ali ; Singh, Avinash ; Jaber, Ahmed ; Cui, Wei ; Xin, Yongbao ; Sullivan, Brian T ; Boyd, Robert W ; Menard, Jean-Michel</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a674-e9cd40a7c8cf59feb3f1e82a49fb08b9900c95a7b6150356817cf6f0e97dca233</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Physics - Optics</topic><toplevel>online_resources</toplevel><creatorcontrib>Maleki, Ali</creatorcontrib><creatorcontrib>Singh, Avinash</creatorcontrib><creatorcontrib>Jaber, Ahmed</creatorcontrib><creatorcontrib>Cui, Wei</creatorcontrib><creatorcontrib>Xin, Yongbao</creatorcontrib><creatorcontrib>Sullivan, Brian T</creatorcontrib><creatorcontrib>Boyd, Robert W</creatorcontrib><creatorcontrib>Menard, Jean-Michel</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Maleki, Ali</au><au>Singh, Avinash</au><au>Jaber, Ahmed</au><au>Cui, Wei</au><au>Xin, Yongbao</au><au>Sullivan, Brian T</au><au>Boyd, Robert W</au><au>Menard, Jean-Michel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Metamaterial-based octave-wide terahertz bandpass filters</atitle><date>2022-08-17</date><risdate>2022</risdate><abstract>We present octave-wide bandpass filters in the terahertz (THz) region based
on bilayer-metamaterial (BLMM) structures. The passband region has a
super-Gaussian shape with a maximum transmittance approaching 70% and a typical
stopband rejection of 20 dB. The design is based on a metasurface consisting of
a metallic square-hole array deposited on a transparent polymer, which is
stacked on top of an identical metasurface with a sub-wavelength separation.
The superimposed metasurface structures were designed using finite-difference
time-domain (FDTD) simulations and fabricated using a photolithography process.
Experimental characterization of these structures between 0.3 to 5.8 THz is
performed with a time-domain THz spectroscopy system. Good agreement between
experiment and simulation results is observed. We also demonstrate that two
superimposed BLMM (2BLMM) devices increase the steepness of the roll-offs to
more than 85 dB/octave and enable a superior stopband rejection approaching 40
dB while the maximum transmittance remains above 64%. This work paves the way
toward new THz applications, including the detection of THz pulses centered at
specific frequencies, and an enhanced time-resolved detection sensitivity
towards molecular vibrations that are noise dominated by a strong,
off-resonant, driving field.</abstract><doi>10.48550/arxiv.2208.08434</doi><oa>free_for_read</oa></addata></record> |
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subjects | Physics - Optics |
title | Metamaterial-based octave-wide terahertz bandpass filters |
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