Magnetic spin–orbit interaction of light

Wang, Mengjia; Zhang, Hongyi; Kovalevich, Tatiana; Salut, Roland; Kim, Myun-Sik; Suárez, Miguel Ángel; Bernal, Maria–Pilar; Herzig, H. P.; Lu, Huihui; Grosjean, Thierry

doi:10.1038/s41377-018-0018-9

“…The proposed one‐channel system and robust method may provide a powerful tool specifically for the near‐field characterization of novel spin‐based phenomena and nanodevices, such as the spin‐dependent topological photonics, and the spin–orbit photonics with 2D materials . By combining with other novel nanoprobes, it may also boost the advances in magnetic SOI of light, near‐field directionality, and even chiral quantum optics, to name a few.…”

Section: Resultsmentioning

confidence: 99%

Probing the Photonic Spin–Orbit Interactions in the Near Field of Nanostructures

Sun

¹

,

Bai

²

,

Wang

³

et al. 2019

Adv Funct Materials

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Photonic spin-orbit interactions (SOI) provide a new design paradigm of functional nanomaterials and nanostructures, and have especially accelerated advances in spin-orbit photonics. The berry phase or the geometric phase, a salient property of SOI, plays a vital role in this process. Thus, the char acterization of photonic SOI processes together with the Berry phase is highly demanded for studies such as the optical spinHall effect, spintovortex conversion, and Rashba effect. Here, a spinselective and phaseresolved near field microscopic method is proposed and experimentally demonstrated for realtime probing and direct visualization of photonic SOI at mesoscale, and a 3D tomographic technique for imaging the spatial evolutions of the optical phases is also properly realized. By analyzing a metallic metasurface as a spin tovortex conversion platform, the abrupt geometric phase and the spatially evolutional dynamic phases are directly measured and intuitively illustrated. This work provides a powerful tool for the study of spin-orbit phenomena in nearfield optics, and can hold the promise for directly exploring the spin dependent surface states in plasmonics and photonic topological insulators.

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“…The control of electromagnetic fields in integrated environments is of paramount importance for a large number of applications in the broader context of information transmission, acquisition, and processing [1][2][3][4][5] . Traditionally, light in an integrated environment is controlled by waveguides that confine the light in the bulk of some media 6,7 .…”

Section: Introductionmentioning

confidence: 99%

“…The propagation lengths, in the limit of vanishing intrinsic material absorption and the absence of scattering losses, ultimately are only limited by the number of layers in the PC. Such appealing characteristics make BSWs suitable for many sensing applications [13][14][15] and also for enhancing the interaction with a magnetic optical field 5 and supporting organic polaritons that result from the strong coupling between a BSW and organic excitons 16 .…”

Section: Introductionmentioning

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)

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0

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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.

show abstract

“…The control of electromagnetic fields in integrated environments is of paramount importance for a large number of applications in the broader context of information transmission, acquisition, and processing 1–5 . Traditionally, light in an integrated environment is controlled by waveguides that confine the light in the bulk of some media 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Inverse photonic design of functional elements that focus Bloch surface waves

Augenstein

¹

,

Vetter

²

,

Lahijani

³

et al. 2018

Self Cite

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.

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Magnetic spin–orbit interaction of light

Cited by 37 publications

References 51 publications

Probing the Photonic Spin–Orbit Interactions in the Near Field of Nanostructures

Probing the Photonic Spin–Orbit Interactions in the Near Field of Nanostructures

Inverse Photonic Design of Functional Elements That Focus Bloch Surface Waves

Inverse photonic design of functional elements that focus Bloch surface waves

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