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Modulation of mid-IR radiation by a gated graphene on ferroelectric substrate

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Strikha M.V.

Abstract. We demonstrate theoretically a possibility for modulation of mid-IR radiation by low-voltage gated single/multilayer graphene placed on ferro-electric Pb[Zr(x)Ti(1-x)]O3 (PZT) substrate. In the range of gate voltages where thin epitaxial PZT films behave as high-permittivity dielectrics, the modulation depth for the case of five-layer graphene can be as high as 10%.

Keywords: grapheme, ferroelectrics, modulation of optical radiation

PACS: 78.67.Wj, 42.79.Hp
UDC: 535
Ukr. J. Phys. Opt. 12 161-165
doi: 10.3116/16091833/12/4/161/2011
Received:  20.09.2011

Анотація Теоретично показано можливість модуляції випромінювання середнього ІЧ-діапазону одно- чи багатошаровим графеном на сегнетоелектричній підкладці Pb[Zr(x)Ti(1-x)]O3 (PZT) при низьких напругах на затворі. Глибина модуляції для 5-шарового графену в діапазоні напруг на затворі, у якому тонка плівка PZT поводиться як діелектрик з дуже високою діелектричною проникністю, становить порядку 10%.

 
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