Two-Dimensional Photonic Devices based on Bloch Surface Waves with One-Dimensional Grooves

Wang, Ruxue; Chen, Junxue; Xiang, Yifeng; Kuai, Yan; Wang, Pei; Ming, Hai; Lakowicz, Joseph R.; Zhang, Douguo

doi:10.1103/physrevapplied.10.024032

“…The free space wavelength of the device is λ 0 =1555 nm. The layer stack is designed to sustain a BSW with TE polarization, and an extension of our results to TM polarization is feasible 23,24 . The effective index without/with the device layer amounts to and , and this defines the wavelength of the BSW .…”

Section: Resultsmentioning

confidence: 95%

Inverse photonic design of functional elements that focus Bloch surface waves

Augenstein

¹

,

Vetter

²

,

Lahijani

³

et al. 2018

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Bloch surface waves (BSWs) are sustained at the interface of a suitably designed one-dimensional (1D) dielectric photonic crystal and an ambient material. The elements that control the propagation of BSWs are defined by a spatially structured device layer on top of the 1D photonic crystal that locally changes the effective index of the BSW. An example of such an element is a focusing device that squeezes an incident BSW into a tiny space. However, the ability to focus BSWs is limited since the index contrast achievable with the device layer is usually only on the order of Δn≈0.1 for practical reasons. Conventional elements, e.g., discs or triangles, which rely on a photonic nanojet to focus BSWs, operate insufficiently at such a low index contrast. To solve this problem, we utilize an inverse photonic design strategy to attain functional elements that focus BSWs efficiently into spatial domains slightly smaller than half the wavelength. Selected examples of such functional elements are fabricated. Their ability to focus BSWs is experimentally verified by measuring the field distributions with a scanning near-field optical microscope. Our focusing elements are promising ingredients for a future generation of integrated photonic devices that rely on BSWs, e.g., to carry information, or lab-on-chip devices for specific sensing applications.

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“…29 For practical fabrication, according to the reported works, one-dimensional multilayered con¯guration of centimeter long in the transverse directions can work for investigations within an area $ 100 Â 100 m 2 . 30,31 In addition, the graphene monolayer with a practical area of $ 0:5 Â 0:5 mm 2 has been experimentally reported. 32 Figure 2 shows the absorption (A), re°ection (R), and transmission (T ) of the two composited \atoms" (EGBC and BCBC) as well as the whole structure EG(BC) 2 with incident angle ¼ 60 under TE polarization.…”

Section: Resultsmentioning

confidence: 99%

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Jin

¹

,

Zhou

²

,

Lai

³

2020

J. Innov. Opt. Health Sci.

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Graphene derivatives, possessing strong Raman scattering and near-infrared absorption intrinsically, have boosted many exciting biosensing applications. The tunability of the absorption characteristics, however, remains largely unexplored to date. Here, we proposed a multilayer configuration constructed by a graphene monolayer sandwiched between a buffer layer and one-dimensional photonic crystal (1DPC) to achieve tunable graphene absorption under total internal reflection (TIR). It is interesting that the unique optical properties of the buffer-graphene-1DPC multilayer structure, the electromagnetically induced transparency (EIT)-like and Fano-like absorptions, can be achieved with pre-determined resonance wavelengths, and furtherly be tuned by adjusting either the structure parameters or the incident angle of light. Theoretical analyses demonstrate that such EIT- and Fano-like absorptions are due to the interference of light in the multilayer structure and the complete transmission produced by the evanescent wave resonance in the configuration. The enhanced absorptions and the huge electrical field enhancement effect exhibit potentials for broad applications, such as photoacoustic imaging and Raman imaging.

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“…The free space wavelength of the device is λ 0 =1555 nm. The layer stack is designed to sustain a BSW with TE polarization, and an extension of our results to TM polarization is feasible 23,24 . The effective index without/with the device layer amounts to n w=o eff ¼ 1:1 and n w eff ¼ 1:2, and this defines the wavelength of the BSW…”

Section: Designmentioning

confidence: 99%

Inverse Photonic Design of Functional Elements That Focus Bloch Surface Waves

Augenstein

¹

,

Vetter

²

,

Lahijani

³

et al. 2019

2019 Conference on Lasers and Electro-Optics Europe &Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)

0

View full text Add to dashboard Cite

Bloch surface waves (BSWs) are sustained at the interface of a suitably designed one-dimensional (1D) dielectric photonic crystal and an ambient material. The elements that control the propagation of BSWs are defined by a spatially structured device layer on top of the 1D photonic crystal that locally changes the effective index of the BSW. An example of such an element is a focusing device that squeezes an incident BSW into a tiny space. However, the ability to focus BSWs is limited since the index contrast achievable with the device layer is usually only on the order of Δn≈0.1 for practical reasons. Conventional elements, e.g., discs or triangles, which rely on a photonic nanojet to focus BSWs, operate insufficiently at such a low index contrast. To solve this problem, we utilize an inverse photonic design strategy to attain functional elements that focus BSWs efficiently into spatial domains slightly smaller than half the wavelength. Selected examples of such functional elements are fabricated. Their ability to focus BSWs is experimentally verified by measuring the field distributions with a scanning near-field optical microscope. Our focusing elements are promising ingredients for a future generation of integrated photonic devices that rely on BSWs, e.g., to carry information, or lab-on-chip devices for specific sensing applications.

show abstract

Two-Dimensional Photonic Devices based on Bloch Surface Waves with One-Dimensional Grooves

Cited by 26 publications

References 53 publications

Inverse photonic design of functional elements that focus Bloch surface waves

Inverse photonic design of functional elements that focus Bloch surface waves

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Inverse Photonic Design of Functional Elements That Focus Bloch Surface Waves

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