Broadband graphene polarizer

Bao, Qiaoliang; Zhang, Han; Wang, Bing; Ni, Zhenhua; Lim, Candy Haley Yi Xuan; Wang, Yu; Tang, Ding; Loh, Kian Ping

doi:10.1038/nphoton.2011.102

Cited by 992 publications

(624 citation statements)

References 29 publications

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“…[20][21][22][23][24][25] For these reasons, the study of plasmonics in graphene has received significant attention both experimentally and theoretically. 21,22,[26][27][28][29] Recently, experimental research on graphene has been extended to the fabrication and study of QD-graphene nanostructures. [30][31][32][33][34] For example, a CdS QD-graphene hybrid system has been synthesized by Cao et al, 30 in which a picosecond ultrafast electron transfer process from the excited QD to the graphene matrix was observed using time-resolved fluorescence spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

et al. 2012

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We study theoretically the dipole-dipole interaction and energy transfer in a hybrid system consisting of a quantum dot and graphene nanodisk embedded in a nonlinear photonic crystal. In our model, a probe laser field is applied to measure the energy transfer between the quantum dot and graphene nanodisk, while a control field manipulates the energy transfer process. These fields create excitons in the quantum dot and surface plasmon polaritons in the graphene nanodisk which interact via the dipole-dipole interaction. Here, the nonlinear photonic crystal acts as a tunable photonic reservoir for the quantum dot, and is used to control the energy transfer. We have found that the spectrum of power absorption in the quantum dot has two peaks due to the creation of two dressed excitons in the presence of the dipole-dipole interaction. The energy transfer rate spectrum of the graphene nanodisk also has two peaks due to the absorption of these two dressed excitons. Additionally, energy transfer between the quantum dot and the graphene nanodisk can be switched on and off by applying a pump laser to the photonic crystal or by adjusting the strength of the dipole-dipole interaction. We show that the intensity and frequencies of the peaks in the energy transfer rate spectra can be modified by changing the number of graphene monolayers in the nanodisk or the separation between the quantum dot and graphene. Our results agree with existing experiments on a qualitative basis. The principle of our system can be employed to fabricate nanobiosensors, optical nanoswitches, and energy transfer devices.

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Section: Introductionmentioning

confidence: 99%

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

et al. 2012

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“…Graphene was primarily grown on Cu foils (25-μm thick with a purity of >99.99 wt% obtained from Alfa Aesar) in a hot wall furnace. The growth process can be briefly summarized as follows: (1) load the fused silica tube with the Cu foil, evacuate, back fill with hydrogen, heat to 1050°C and maintain a H 2 (g) pressure of 42 mTorr under a 2.5 sccm flow; (2) stabilize the Cu film at the desired temperature, up to 1050°C, and introduce 40 sccm of CH 4 (g) for a desired period of time at a total pressure of 450 mTorr; (3) after exposure to CH 4 , cool the furnace to room temperature. Then, poly(methyl methacrylate) (PMMA) film was spin coated on the surface of the graphene-deposited Cu foil.…”

Section: Graphene-coated Optical Fiber Devicementioning

confidence: 99%

“…On the one hand, many breakthroughs in research on graphene, including ultrafast photodetectors [3], broadband polarizers [4], and modulators [5], benefit from its unique band structure. The graphene electro-absorption modulator [5] is based on interband transitions, which can be tuned by applying drive voltage, correspondingly changing the Fermi energy (E F ) of graphene.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Enhanced Optical Signal Processing

Wang¹,

Hu²

2017

Graphene Materials - Advanced Applications

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Graphene has emerged as an attractive material for a myriad of optoelectronic applications due to its variety of remarkable optical, electronic, thermal and mechanical properties. So far, the main focus has been on graphene based photonics and optoelectronics devices. Due to the linear band structure allowing interband optical transitions at all photon energies, graphene has remarkably large third-order optical susceptibility χ (3) , which is only weakly dependent on the wavelength in the near-infrared frequency range. Graphene possesses the properties of the enhancement four-wave mixing (FWM) of conversion efficiency. So, we believe that the potential applications of graphene also lies in nonlinear optical signal processing, where the combination of its unique large χ (3) nonlinearities and dispersionless over the wavelength can be fully exploited. In this chapter, we give a brief overview of our recent progress in graphene-assisted nonlinear optical device which is graphene-coated optical fiber and graphene-silicon microring resonator and their applications, including degenerate FWM based tunable wavelength conversion of quadrature phase-shift keying (QPSK) signal, two-input optical computing, three-input high-base optical computing, graphene-silicon microring resonator enhanced nonlinear optical device for on-chip optical signal processing, and nonlinearity enhanced graphenesilicon microring for selective conversion of flexible grid multi-channel multi-level signal.

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“…Its linear dispersion relation between energy and crystal momentum results in remarkable material parameters and makes it a star contender for lots of applications, especially for electronic [14][15][16][17], photonic [18,19], and optoelectronic applications [20][21][22][23][24]. With zero bandgap, graphene can absorb electromagnetic radiation ranging from far-infrared to UV light [25].…”

Section: Introductionmentioning

confidence: 99%

Monolithic optoelectronic integrated broadband optical receiver with graphene photodetectors

et al. 2017

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Optical receivers with potentially high operation bandwidth and low cost have received considerable interest due to rapidly growing data traffic and potential Tb/s optical interconnect requirements. Experimental realization of 65 GHz optical signal detection and 262 GHz intrinsic operation speed reveals the significance role of graphene photodetectors (PDs) in optical interconnect domains. In this work, a novel complementary metal oxide semiconductor post-backend process has been developed for integrating graphene PDs onto silicon integrated circuit chips. A prototype monolithic optoelectronic integrated optical receiver has been successfully demonstrated for the first time. Moreover, this is a firstly reported broadband optical receiver benefiting from natural broadband light absorption features of graphene material. This work is a perfect exhibition of the concept of monolithic optoelectronic integration and will pave way to monolithically integrated graphene optoelectronic devices with silicon ICs for three-dimensional optoelectronic integrated circuit chips.

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Broadband graphene polarizer

Cited by 992 publications

References 29 publications

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

Graphene-Enhanced Optical Signal Processing

Monolithic optoelectronic integrated broadband optical receiver with graphene photodetectors

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