Gratings that diffract all incident energy*

Jull, E.V.; Heath, James W.; Ebbeson, Gordon R.

doi:10.1364/josa.67.000557

Cited by 46 publications

(12 citation statements)

References 7 publications

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“…Blazed gratings 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 can reflect an oblique incident wave back in the direction of incidence with low or even zero specular scattering, unlike mirrors and metal plates. The scattering of the incident wave into diffraction orders is dictated by the grating periodicity, which is in the order of the free-space wavelength for blazing.…”

mentioning

confidence: 99%

“…The scattering of the incident wave into diffraction orders is dictated by the grating periodicity, which is in the order of the free-space wavelength for blazing. Typical blazed gratings 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 , such as the classical right-angle sawtooth grating 1 shown in Fig. 1a , and the rectangular groove grating 2 shown in Fig.…”

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confidence: 99%

“…Perfect blazing (100% of incident power diffracted to the m = − 1 order and zero specular scattering) has been demonstrated using rectangular groove based gratings 2 3 shown in Fig. 1b .…”

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confidence: 99%

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Wide-band/angle Blazed Surfaces using Multiple Coupled Blazing Resonances

Memarian

Morimoto

et al. 2017

Sci Rep

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Blazed gratings can reflect an oblique incident wave back in the path of incidence, unlike mirrors and metal plates that only reflect specular waves. Perfect blazing (and zero specular scattering) is a type of Wood’s anomaly that has been observed when a resonance condition occurs in the unit-cell of the blazed grating. Such elusive anomalies have been studied thus far as individual perfect blazing points. In this work, we present reflective blazed surfaces that, by design, have multiple coupled blazing resonances per cell. This enables an unprecedented way of tailoring the blazing operation, for widening and/or controlling of blazing bandwidth and incident angle range of operation. The surface can thus achieve blazing at multiple wavelengths, each corresponding to different incident wavenumbers. The multiple blazing resonances are combined similar to the case of coupled resonator filters, forming a blazing passband between the incident wave and the first grating order. Blazed gratings with single and multi-pole blazing passbands are fabricated and measured showing increase in the bandwidth of blazing/specular-reflection-rejection, demonstrated here at X-band for convenience. If translated to appropriate frequencies, such technique can impact various applications such as Littrow cavities and lasers, spectroscopy, radar, and frequency scanned antenna reflectors.

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Wide-band/angle Blazed Surfaces using Multiple Coupled Blazing Resonances

Memarian

Morimoto

et al. 2017

Sci Rep

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“…. ~ (1) where A is the wavelength, d is the period, and n is the spectral order. When the Bragg condition, d = h/(2 sin 0,) is satisfied, the specular reflection is completely eliminated and the surface becomes a perfect backscatterer.…”

Section: Methodology and Experimental Setupmentioning

confidence: 99%

The performance of a novel simulated corrugated surface for the reduction of radar cross section

Mathew¹,

Stephen²,

Jose³

et al. 1993

Micro & Optical Tech Letters

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The development of a new simulated corrugated surface (SCS), which eliminates specular reflection and backscattering simultaneously for TE and TM polarizations, is reported. This surface, designed for blazing at non‐Bragg angles, is suitable for the reduction of radar cross section and frequency scanning. It is also established that the behavior of the SCS is equivalent to that of three‐dimensional (3D) metallic corrugations having the same grating parameters. © 1993 John Wiley & Sons, Inc.

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“…Moreover, RAM based solutions are not rigid and susceptible to degradation in harsh environments. Another technique, which circumvents the heating problem and can have a rigid metallic profile, is based on diffraction gratings [1,4] where the reflected power is redirected eliminating both specular reflection [5][6][7] and backscattering [8]. At difference with RAM solutions, gratings absorb only a small amount of the incident energy and can be used in high power systems.…”

Section: Introductionmentioning

confidence: 99%

Wideband backscattering reduction at terahertz using compound reflection grating

2017

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Backscattering reduction is usually achieved by using either absorbers or diffractions gratings at the expense of a narrow bandwidth. In this paper, we propose a different strategy based on a metallic compound reflection grating (CRG). We demonstrate that this structure allows a strong and broadband (fractional bandwidth, FBW ≈57%) backscattering reduction in the terahertz (THz) range by efficiently transferring the incident energy to the diffracted modes. The design is analyzed in terms of equivalent circuit and numerical simulations and the results are corroborated by a manufactured prototype operating at 0.35 THz.

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Gratings that diffract all incident energy*

Cited by 46 publications

References 7 publications

Wide-band/angle Blazed Surfaces using Multiple Coupled Blazing Resonances

Wide-band/angle Blazed Surfaces using Multiple Coupled Blazing Resonances

The performance of a novel simulated corrugated surface for the reduction of radar cross section

Wideband backscattering reduction at terahertz using compound reflection grating

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