High-efficiency three-port beam splitter of reflection grating with a metal layer

Shu, Wenhao; Wang, Bo; Li, Hongtao; Liu, Liang; Chen, Li; Zhou, Jinyun

doi:10.1016/j.spmi.2015.03.059

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…The pre-selection measurement (Fig. 1 ) was actually a preparation, splitting the wavefunction without measurement, that sets the stage for the riddle (For illustration we use a three-port beam splitter similar to those in refs 14 and 15 . In practice, it could be simpler to use a nested Mach-Zehnder Interferometer as in refs 16 and 17 .…”

Section: Methods and Resultsmentioning

confidence: 99%

The Case of the Disappearing (and Re-Appearing) Particle

Aharonov

Cohen

Landau

et al. 2017

Sci Rep

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A novel prediction is derived by the Two-State-Vector-Formalism (TSVF) for a particle superposed over three boxes. Under appropriate pre- and post-selections, and with tunneling enabled between two of the boxes, it is possible to derive not only one, but three predictions for three different times within the intermediate interval. These predictions are moreover contradictory. The particle (when looked for using a projective measurement) seems to disappear from the first box where it would have been previously found with certainty, appearing instead within the third box, to which no tunneling is possible, and later re-appearing within the second. It turns out that local measurement (i.e. opening one of the boxes) fails to indicate the particle’s presence, but subtler measurements performed on the two boxes together reveal the particle’s nonlocal modular momentum spatially separated from its mass. Another advance of this setting is that, unlike other predictions of the TSVF that rely on weak and/or counterfactual measurements, the present one uses actual projective measurements. This outcome is then corroborated by adding weak measurements and the Aharonov-Bohm effect. The results strengthen the recently suggested time-symmetric Heisenberg ontology based on nonlocal deterministic operators. They can be also tested using the newly developed quantum router.

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Section: Methods and Resultsmentioning

confidence: 99%

The Case of the Disappearing (and Re-Appearing) Particle

Aharonov

Cohen

Landau

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The response of the splitter can be considered as a combination of two basic functionalities (anomalous reflections at two angles) dictated by (2) and (3). Beam splitters have been studied intensively in the form of diffraction gratings (see e.g., [41,42]), however, to the best of our knowledge, the possibility to tailor the proportion of power divided into different directions was not reported. Usually, the power is split equally between all channels.…”

Section: Three-channel Power Splittermentioning

confidence: 99%

Flat Engineered Multichannel Reflectors

et al. 2017

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Recent advances in engineered gradient metasurfaces have enabled unprecedented opportunities for light manipulation using optically thin sheets, such as anomalous refraction, reflection, or focusing of an incident beam. Here we introduce a concept of multi-channel functional metasurfaces, which are able to control incoming and outgoing waves in a number of propagation directions simultaneously. In particular, we reveal a possibility to engineer multi-channel reflectors. Under the assumption of reciprocity and energy conservation, we find that there exist three basic functionalities of such reflectors: Specular, anomalous, and retro reflections. Multi-channel response of a general flat reflector can be described by a combination of these functionalities. To demonstrate the potential of the introduced concept, we design and experimentally test three different multi-channel reflectors: Three-and five-channel retro-reflectors and a three-channel power splitter. Furthermore, by extending the concept to reflectors supporting higher-order Floquet harmonics, we forecast the emergence of other multiple-channel flat devices, such as isolating mirrors, complex splitters, and multi-functional gratings.arXiv:1610.04780v2 [physics.optics]

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“…Li et al proposed a two-layer three-port output beam splitting grating working at the wavelength of 800 nm, where the efficiency of each diffracted order exceeds 30% within the incident angular bandwidth range of −1.04-3.14 [23] Shu et al proposed an encapsulated grating with a metal slab reflection three-port beam splitter at the wavelength of 1550 nm under normal incidence. After the grating parameters are optimized, efficiencies can reach more than 32% with the polarization-independent property [24].…”

Section: Introductionmentioning

confidence: 99%

Triple-channel reflective splitter in terahertz band by second-order Littrow illumination

Liu¹,

Wang²

2023

Laser Phys.

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In this paper, a triple-channel reflective beam splitter in terahertz band with connecting layer under second Bragg incidence is presented. A rigorous coupled-wave analysis is applied to optimize the profile of the grating at 2.52 THz. The optimal parameters of the grating are also verified by using the finite element method to ensure the accuracy of the data. The impact of the incident angle, incident wavelength, duty cycle, and period is analyzed in detail. For the optimized grating working in terahertz band, results for diffraction efficiencies approaching over 30% for transverse-electric polarization in three propagating orders and for transverse-magnetic polarization in the -1st order and -2nd order are derived. Obtaining stable and superior performances, the proposed three-port beam splitter working in the terahertz band is novel and could be an inspiration to design new gratings.

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High-efficiency three-port beam splitter of reflection grating with a metal layer

Cited by 11 publications

References 18 publications

The Case of the Disappearing (and Re-Appearing) Particle

The Case of the Disappearing (and Re-Appearing) Particle

Flat Engineered Multichannel Reflectors

Triple-channel reflective splitter in terahertz band by second-order Littrow illumination

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