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perfect terahertz absorption with graphene surface plasmons in the modified otto configuration
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نویسنده
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jiang leyong ,guo jun ,wang qingkai ,dai xiaoyu ,xiang yuanjiang
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منبع
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plasmonics - 2017 - دوره : 12 - شماره : 6 - صفحه:1825 -1831
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چکیده
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Perfect terahertz (thz) absorption in the modified otto configuration with the insertion of monolayer graphene sheet has been numerically demonstrated. this perfect absorption originates from the enhancement of the electrical field owing to the excitation of the transverse magnetic (tm) polarized surface plasmons at the interface of two dielectrics with monolayer graphene. it is found that the absorption peak occurs at the specific incident angles, which can be employed for realizing the angular absorbers. we further demonstrate that the angle of the peak absorption and the corresponding wavelength can be manipulated by changing the fermi energy of monolayer graphene sheet via electrostatic biasing. moreover, the behaviors of the perfect absorption are strongly dependent on the dielectric constants and thicknesses of the surrounding dielectrics.
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کلیدواژه
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terahertz absorption ,graphene ,surface plasmons ,otto configuration
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آدرس
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key laboratory of optoelectronic devices and systems of ministry of education and guangdong province, shenzhen university, szu-nus collaborative innovation center for optoelectronic science & technology, college of optoelectronic engineering, china. hunan normal university, college of physics and information science, china, key laboratory of optoelectronic devices and systems of ministry of education and guangdong province, shenzhen university, szu-nus collaborative innovation center for optoelectronic science & technology, college of optoelectronic engineering, china, key laboratory of optoelectronic devices and systems of ministry of education and guangdong province, shenzhen university, szu-nus collaborative innovation center for optoelectronic science & technology, college of optoelectronic engineering, china, key laboratory of optoelectronic devices and systems of ministry of education and guangdong province, shenzhen university, szu-nus collaborative innovation center for optoelectronic science & technology, college of optoelectronic engineering, china, key laboratory of optoelectronic devices and systems of ministry of education and guangdong province, shenzhen university, szu-nus collaborative innovation center for optoelectronic science & technology, college of optoelectronic engineering, china
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Authors
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