Narrow spectral bandwidths with grating waveguide structures

Sharon, André; Rosenblatt, D.; Friesem, Asher A.

doi:10.1063/1.116969

Cited by 95 publications

(34 citation statements)

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“…Grating waveguide structures [8] provide another possibility of constructing high reflectivity devices. The interest of earlier work on grating waveguides lay mainly in narrowband (highly resonant) devices for applications in optical filtering [9] and optical switching [10]. However, grating waveguide structures can also provide broadband (weakly resonant) reflectors.…”

Section: Introductionmentioning

confidence: 99%

High reflectivity grating waveguide coatings for 1064 nm

Bunkowski

Burmeister

Friedrich

et al. 2006

Class. Quantum Grav.

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We propose thin single-layer grating waveguide structures to be used as high reflectivity, but low thermal noise, alternative to conventional coatings for gravitational wave detector test mass mirrors. Grating waveguide (GWG) coatings can show a reflectivity of up to 100% with an overall thickness of less than a wavelength. We theoretically investigate GWG coatings for 1064 nm based on tantala (Ta 2 O 5 ) on a silica substrate focusing on broad spectral response and low thickness.

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Section: Introductionmentioning

confidence: 99%

High reflectivity grating waveguide coatings for 1064 nm

Bunkowski

Burmeister

Friedrich

et al. 2006

Class. Quantum Grav.

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“…In the same time, mini-forbidden band effect exists for guided modes because of strong Bragg scattering for optical waves propagating at the interface of PC as well as in PC. This makes each guided mode falling in a corresponding much narrower frequency band for a waveguide with particular thickness [24].…”

Section: Discussionmentioning

confidence: 98%

Study on transmission characteristics in photonic crystals with negative effective index of refraction

Shen¹,

Li²,

Ma³

et al. 2008

Cryst. Res. Technol.

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Transmission spectra from equivalent negative refractive photonic crystals (PCs) composed of a triangular array of air cylinders in a GaAs matrix are studied by finite-difference time-domain method in the paper. Mechanism of wave resonance is probed and propagation of optical waves in the PCs is described in terms of effective refraction index and Bloch waves. Our numerical results show that probability of spontaneous radiation would be enhanced extremely under the influence of Bloch resonance waves, stimulated emission and photon tunnel effect, resulting in the optical waves localized greatly in the PCs at particular frequencies. In addition, we find out that the position of transmission peaks, with values far greater than unit, can be controlled by tuning the central frequency of waveguide source. It means that photon current in the PCs also can be controlled to optimize transmission properties of PCs, so as to meet the requirements of novel optical devices based on PCs.

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“…The physical mechanism could be explained in view of redistribution of optical energy. The incident optical waves with different frequency will experience Bragg scattering intensively when they are incident upon the NR-PC and propagating in the NR-PC because of the periodic distribution of negative-refraction media, which results in mini-forbidden bands and photonic tunneling effect for a given NR-PC (Sharon et al 1997;Shadrivov et al 2004). At the same time, the optical energy is highly localized, and the high transmissivity appears at the resonance frequency.…”

Section: Design and Calculation Models Of The Nr-pc Flat Lensmentioning

confidence: 98%

Two-square target detection and imaging using NR-PC flat lens

Lian

Shen

et al. 2011

Opt Quant Electron

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The characteristics of two-target detection and imaging from negative-refraction photonic crystal (NR-PC) flat lens are studied by using the two-dimensional finite-difference time-domain method. It is demonstrated that due to the influence of the mini-forbidden band and resonance excitation effect, high transmissivity will appear at the normalized resonance frequency of 0.3068 when the lightwave goes through the NR-PC lens. Meanwhile, the use of the NR-PC lens may introduce at least fourfold improvement of the refocusing resolution, if compared to the directly backscattered lightwave without using the NR-PC lens. In addition, by giving a defination for two-target minimum distinguishable distance, we further investigate the performance of two-target detection and imaging system using the proposed focus-scanning scheme. The results show that the smaller the size of the target pair is, the weeker the interference between the two targets will be, which results in a better performance in the minimum distinguishable distance.

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Narrow spectral bandwidths with grating waveguide structures

Cited by 95 publications

References 0 publications

High reflectivity grating waveguide coatings for 1064 nm

High reflectivity grating waveguide coatings for 1064 nm

Study on transmission characteristics in photonic crystals with negative effective index of refraction

Two-square target detection and imaging using NR-PC flat lens

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