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首页> 外文会议>2014 Third Mediterranean Photonics Conference >Absorption and losses in one-dimensional photonic crystal perfect absorber incorporating a monolayer graphene
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Absorption and losses in one-dimensional photonic crystal perfect absorber incorporating a monolayer graphene

机译：包含单层石墨烯的一维光子晶体完美吸收体的吸收和损耗

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We investigate the linear and nonlinear properties of a monolayer graphene embedded in a quarter-wave one-dimensional Photonic Crystal (1D-PhC) in terms of absorption and losses. In particular, we show that it is possible to achieve near-perfect narrow-band absorption when the monolayer graphene is sandwiched between two PhC mirrors with optimized pair number. The simulations reveal that the resonant wavelength and the total absorption frequency may be tuned by tilting the angle of incidence of the impinging source for both TE and TM polarizations. We also show that the losses related to the dielectric materials constituting the 1D-PhC can degrade the optical performance of the device. Preliminary fabrication tests reveal that the sputtering process does not lead to graphene structural damages affecting the material properties. Finally, by exploiting the large nonlinear response and the saturation effects of graphene monolayers we demonstrate how the structure can be dynamically change the structure from a perfect absorber to a mirror. These features make this device attractive for different applications ranging from tunable and saturable absorbers for short-pulse lasers, to graphene-based photodetectors.
机译：我们研究了在吸收和损耗方面嵌入四分之一波一维光子晶体（1D-PhC）的单层石墨烯的线性和非线性特性。特别是，我们表明，当单层石墨烯夹在两个具有最佳对数的PhC镜之间时，可以实现近乎完美的窄带吸收。仿真表明，对于TE和TM极化，可以通过倾斜入射源的入射角来调整谐振波长和总吸收频率。我们还表明，与构成1D-PhC的介电材料有关的损耗会降低器件的光学性能。初步的制造测试表明，溅射工艺不会导致石墨烯结构损坏，从而影响材料性能。最后，通过利用大的非线性响应和石墨烯单层的饱和效应，我们演示了如何动态地将结构从完美的吸收体变为反射镜。这些特性使该器件对于从短脉冲激光器的可调吸收器和饱和吸收器到基于石墨烯的光电探测器等不同应用具有吸引力。

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