Energy splitting of resonant photonic states in nonlinear nanophotonic double waveguides

Cox, Joel D.; Singh, Mahi R.

doi:10.1063/1.3498811

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Applications for photonic crystals include all-optical microchips for optical information processing, optical communication networks, sensors, and solar energy harvesting. [7][8][9][10][11][12] In our investigation, we consider a nonlinear photonic crystal, which has a refractive index distribution that can be tuned optically. The nonlinear photonic crystal surrounds the hybrid system and is used to manipulate the interaction between the quantum emitter and graphene nanodisk.…”

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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“…[12][13][14] It has been found that the number of bound states within the waveguides depended on the width and well depth and the Hetero-structure have been used to develop devices such as resonant cavities 15 , waveguides 16 and filters 17 . Meanwhile nonlinear nanophotonic coupling waveguides induced by laser or stress field have also been investigated both theoretically [18][19][20] and experimentally [21][22] . Nonlinear photonic waveguides are formed by embedding Kerr-nonlinear photonic crystals in a linear photonic crystal.…”

Section: Introductionmentioning

confidence: 99%

Resonant splitting in periodic T-shaped photonic waveguides

Wang

Yang

Xie

et al. 2012

Journal of Applied Physics

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Abstract:Resonant splitting phenomena of photons in periodic T-shaped waveguide structure are investigated by the Green's function method. An interesting resonant phenomenon is found in the transmission spectra. When the T-shaped structure contains n constrictions, there are (n-1)-fold resonant splitting peaks in the low frequency region. The peaks are induced by low quasi-bound states in which photons are intensively localized in the stubs. While (n-2)-fold resonant splitting occurs in the high frequency region. These peaks are induced by the high quasi-bound states where the photons are mainly localized in constrictions rather than in stubs. To this kind of quasi-bound state, the stub acts as a potential barrier rather than a well, which is the inverse of the case of the low quasi-bound states corresponding to the (n-1)-fold splitting peaks. These resonant peaks can be modulated by adjusting the periodic number and geometry of the waveguide structures. The results can be used to develop optical switching devices, tunable filters, and coupled waveguides.

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