Evanescent coupling of asymmetric self-rolled-up microtube and slab waveguide

Sedaghat, Setareh; Zarifkar, Abbas

doi:10.1016/j.optcom.2016.07.076

Cited by 9 publications

(5 citation statements)

References 36 publications

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“…Reported experimental quality factors are around 3000-5000 for most of the III-V and other material-based tube WGMs [15,31], but have reached 1.5 × 10 5 [20], comparable with the maximal Q-factor suggested by our simulations. A detailed mathematical analysis of the rolled-up WGM resonators [71] suggests also that the Q-factor is limited by edge scattering but find larger upper limit then seen in experiment and our simulations.…”

Section: Introductionsupporting

confidence: 56%

“…Whereas there is almost no leakage for the perfect ring resonator-as observed in figure 4(c)-a strong leakage of the electrical field is seen in the FDTD simulations on the starting and finishing edges of the tube (figure 4(d)). This leakage is responsible for a decrease in quality factors as pointed out by [14,67,71]. In our simulations they decrease to values between 10 5 and 10 4 .…”

Section: Introductionsupporting

confidence: 55%

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Review: using rolled-up tubes for strain-tuning the optical properties of quantum emitters

Gomes

Gomes²,

Silva

et al. 2023

Nanotechnology

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Rolled-up tubes based on released III-V heterostructures have been extensively studied and established as optical resonators in the last two decades. In this review, we discuss how light emitters (quantum wells and quantum dots) are influenced by the inherently asymmetric strain state of these tubes. Therefore, we briefly review whispering gallery mode resonators built from rolled-up III-V heterostructures. The curvature and its influence over the diameter of the rolled-up micro- and nanotubes are discussed, with emphasis on the different possible strain states that can be produced. Experimental techniques that access structural parameters are essential to obtain a complete and correct image of the strain state for the emitters inside the tube wall. In order to unambiguously extract such strain state, we discuss X-ray diffraction results in these systems, providing a much clearer scenario compared to a sole tube diameter analysis, which provides only a first indication of the lattice relaxation in a given tube. Further, the influence of the overall strain lattice state on the band structure is examined via numerical calculations. Finally, experimental results for the wavelength shift of emissions due to the tube strain state are presented and compared with theoretical calculations available in literature, showing that the possibility to use rolled-up tubes to permanently strain engineer the optical properties of build-in quantum emitters is a consistent method to induce the appearance of electronic states unachievable by direct growth methods.

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Section: Introductionsupporting

confidence: 56%

Section: Introductionsupporting

confidence: 55%

Review: using rolled-up tubes for strain-tuning the optical properties of quantum emitters

Gomes

Gomes²,

Silva

et al. 2023

Nanotechnology

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“…Optical microcavity [7], metal grating [8], surface plasmon structure [9], and other structures have been successfully used for performance improvement. In addition, although most of the functional layers of photodetectors exist in a planar form, recent studies show that devices of three-dimensional (3D) structures present better light field regulation ability and application advantages [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Nanomembrane-assembled nanophotonics and optoelectronics: from materials to applications

Huang¹,

Huang²,

Zhao³

et al. 2022

J. Phys.: Condens. Matter

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Nanophotonics and optoelectronics are the keys to the information transmission technology field. The performance of the devices crucially depends on the light-matter interaction, and it is found that three-dimensional (3D) structures may be associated with strong light field regulation for advantageous application. Recently, 3D assembly of flexible nanomembranes has attracted increasing attention in optical field, and novel optoelectronic device applications have been demonstrated with fantastic 3D design. In this review, we first introduce the fabrication of various materials in the form of nanomembrane. On the basis of the deformability of nanomembranes, 3D structures can be built by patterning and release steps. Specifically, assembly methods to build 3D nanomembrane are summarized as rolling, folding, buckling and pick-place methods. Incorporating functional materials and constructing fine structures are two important development directions in 3D nanophotonics and optoelectronics, and we settle previous researches on these two aspects. The extraordinary performance and applicability of 3D devices show the potential of nanomembrane assembly for future optoelectronic applications in multiple areas.

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“…Because of the rolling mechanism of TiO 2 strained bilayers, the broken rotational symmetry between the inner and outer edges of the SRM introduces an asymmetric parameter (γ) [as presented in Fig. 4(a)] that affects the resonant wavelengths, which resulted from the light confinement in the axial direction and cross-section plane [17][18][19] . Figure 4(b) shows the resonant wavelengths of the designed SRM versus γ for the 65th azimuthal mode and the first radial mode.…”

mentioning

confidence: 99%

“…It should be noted that R andβ are solved by the radial wave equation for an asymmetric SRM [17] . The resultant transfer function, representing the transmitted field in the drop port, is simplified to Figure 6 shows the effect of g 1 on the transmittance coefficient (20 log jT drop j) at λ ¼ 1550.12 nm.…”

mentioning

confidence: 99%

Vertical integration of self-rolled-up microtube and silicon waveguides: a two-channel optical add–drop multiplexer

Sedaghat

Zarifkar

2017

Chin. Opt. Lett.

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A novel design of a two-channel optical add-drop multiplexer based on a self-rolled-up microtube (SRM) is presented. This design consists of an SRM that has a parabolic lobe-like pattern along the tube's axial direction, as well as straight silicon waveguides and a 180°waveguide bend. The vertical configuration of the SRM and waveguides is analyzed by the coupled mode theory for achieving the optimum gap. In the critical coupling regime, when the device serves as an optical demultiplexer, the minimum insertion loss is 1.94 dB, and the maximum channel crosstalk is −6.036 dB. Also, as an optical multiplexer, the maximum crosstalk becomes −11.9 dB.

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Evanescent coupling of asymmetric self-rolled-up microtube and slab waveguide

Cited by 9 publications

References 36 publications

Review: using rolled-up tubes for strain-tuning the optical properties of quantum emitters

Review: using rolled-up tubes for strain-tuning the optical properties of quantum emitters

Nanomembrane-assembled nanophotonics and optoelectronics: from materials to applications

Vertical integration of self-rolled-up microtube and silicon waveguides: a two-channel optical add–drop multiplexer

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