Crossover from electromagnetically induced transparency to Autler–Townes splitting in open ladder systems with Doppler broadening

Tan, Chaohua; Huang, Guoxiang

doi:10.1364/josab.31.000704

Cited by 30 publications

(22 citation statements)

References 48 publications

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“…In the intermediate-driving regime 51 quantified by k4k T , b ¼ b r is real (that is, b i ¼ 0). This leads to complex eigenfrequencies o ± ¼ ( À ig 1 À ig 2± 2b r )/4 and complex w± ¼ À 1/2±i(g 1 À g 2 )/4b r .…”

Section: Resultsmentioning

confidence: 99%

What is and what is not electromagnetically induced transparency in whispering-gallery microcavities

et al. 2014

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There has been an increasing interest in all-optical analogues of electromagnetically induced transparency and Autler-Townes splitting. Despite the differences in their underlying physics, both electromagnetically induced transparency and Autler-Townes splitting are quantified by a transparency window in the absorption or transmission spectrum, which often leads to a confusion about its origin. While the transparency window in electromagnetically induced transparency is a result of Fano interference among different transition pathways, in Autler-Townes splitting it is the result of strong field-driven interactions leading to the splitting of energy levels. Being able to tell objectively whether an observed transparency window is because of electromagnetically induced transparency or Autler-Townes splitting is crucial for applications and for clarifying the physics involved. Here we demonstrate the pathways leading to electromagnetically induced transparency, Fano resonances and AutlerTownes splitting in coupled whispering-gallery-mode resonators. Moreover, we report the application of the Akaike Information Criterion discerning between all-optical analogues of electromagnetically induced transparency and Autler-Townes splitting and clarifying the transition between them.

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Section: Resultsmentioning

confidence: 99%

What is and what is not electromagnetically induced transparency in whispering-gallery microcavities

et al. 2014

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“…Although ATS and EIT share similar spectra lineshapes, and can be understood by a coupled two-oscillator system, even crossover could happen between EIT and ATS under some situations67, their origins are different8: in EIT the transparency window is a quantum destructive interference between the energy transferred from an initial state to a final state via different pathways, whereas in ATS it is due to the strong-coupling induced splitting of resonant modes. In the following, a system that has a transparency window but is not originated from EIT will be called an EIT-like system.…”

mentioning

confidence: 99%

Tuneable complementary metamaterial structures based on graphene for single and multiple transparency windows

Ding

Arigong

Ren

et al. 2014

Sci Rep

160

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Novel graphene-based tunable plasmonic metamaterials featuring single and multiple transparency windows are numerically studied in this paper. The designed structures consist of a graphene layer perforated with quadrupole slot structures and dolmen-like slot structures printed on a substrate. Specifically, the graphene-based quadrupole slot structure can realize a single transparency window, which is achieved without breaking the structure symmetry. Further investigations have shown that the single transparency window in the proposed quadrupole slot structure is more likely originated from the quantum effect of Autler-Townes splitting. Then, by introducing a dipole slot to the quadrupole slot structure to form the dolmen-like slot structure, an additional transmission dip could occur in the transmission spectrum, thus, a multiple-transparency-window system can be achieved (for the first time for graphene-based devices). More importantly, the transparency windows for both the quadrupole slot and the dolmen-like slot structures can be dynamically controlled over a broad frequency range by varying the Fermi energy levels of the graphene layer (through electrostatic gating). The proposed slot metamaterial structures with tunable single and multiple transparency windows could find potential applications in many areas such as multiple-wavelength slow-light devices, active plasmonic switching, and optical sensing.

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“…The PIT condition of the system reads B 2 ≫ γ 1 γ 2 /4. To illustrate the interference effect between the bright and dark modes apparently, we make a spectrum decomposition on Im( K ) using the technique developed recently in refs 30 , 31 , 32 for different coupling constant κ .…”

Section: Resultsmentioning

confidence: 99%

Giant Kerr nonlinearity and low-power gigahertz solitons via plasmon-induced transparency

Bai

Huang

Liu

et al. 2015

Sci Rep

Self Cite

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We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators. We show that the PIT in such metamaterial can not only mimic the electromagnetically induced transparency in coherent three-level atomic systems, but also exhibit a crossover from PIT to Autler-Townes splitting. We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power. Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.

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Crossover from electromagnetically induced transparency to Autler–Townes splitting in open ladder systems with Doppler broadening

Cited by 30 publications

References 48 publications

What is and what is not electromagnetically induced transparency in whispering-gallery microcavities

What is and what is not electromagnetically induced transparency in whispering-gallery microcavities

Tuneable complementary metamaterial structures based on graphene for single and multiple transparency windows

Giant Kerr nonlinearity and low-power gigahertz solitons via plasmon-induced transparency

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