Thermally tunable filter for terahertz range based on a one-dimensional photonic crystal with a defect

Němec, H.; Duvillaret, Lionel; Garet, Frédéric; Kužel, Petr; Xavier, P.; Richard, Jonathan T.; Rauly, D.

doi:10.1063/1.1787623

Cited by 134 publications

(59 citation statements)

References 24 publications

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“…Seminal approaches to introduce dynamic tunability of the stop band include the interaction of external triggers such as temperature [33] and magnetic or electric fields with physically responsive defect layers such as conducting polymers. [34] An alternative chemical approach takes advantage of the intrinsic material properties of ''active'' layer materials, which interact or react with the analyte, thus giving rise to a chemically encoded optical response.…”

Section: Clay and Zeolite Bragg Stacksmentioning

confidence: 99%

Stacking the Nanochemistry Deck: Structural and Compositional Diversity in One‐Dimensional Photonic Crystals

et al. 2009

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One-dimensional photonic structures, known as Bragg stacks reflectors or Bragg mirrors, represent a well-developed subject in the field of optical science. However, because of a lack of dynamic tunablity and their dependence on complex top-down techniques for their fabrication, they have received little attention from the materials science community present recent and ongoing developments on the way to fun dimensional photonic structures obtained from simple botton-up techniques. We focus on the versatility of this new approach, which allows the incorporation of a wide range of materials into photonic structures

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Section: Clay and Zeolite Bragg Stacksmentioning

confidence: 99%

Stacking the Nanochemistry Deck: Structural and Compositional Diversity in One‐Dimensional Photonic Crystals

et al. 2009

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“…Various approaches have been pursued to engineer tunable (electrically, magnetically, or by an external laser source optically controlled) THz filters as well as modulators/switches by using 1D and 2D PhCs [19][20][21][22][23][24][25][26][27][28]. Most notably from those approaches for the here envisaged THz FEL applications is the group which employs liquid crystals (LC) in conjunction with dielectric layers [26,27].…”

Section: Intracavity Modulators (Filters) For Thz Felsmentioning

confidence: 99%

Dynamically tunable mirrors for THz free electron laser applications

Tecimer

Holldack

Elias

2010

Phys. Rev. ST Accel. Beams

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We have constructed and tested 1D-photonic crystal (PhC) mirrors with tunable reflectivity to be used as efficient, broadband outcouplers for THz free electron lasers (FELs). The test mirrors cover a spectral range between 0.5 and 1.5 THz. They are assembled by stacking up quarter-wave dielectric layers separated by vacuum. The adopted PhC mirror design enables dynamical (while lasing) adjustment of individual layer spacing. Single as well as multiple defects in the periodicity are introduced to invoke a continuous, well-defined tuning of reflectivity and outcoupling ratio. The scheme allows one to vary also the PhC period while the equidistant spacing between the layers is maintained. This feature is used to shift the photonic band gap (center) for achieving an effective extension in the reflectance spectrum. Because of the exceptional flexibility provided by the scheme in tailoring the characteristics of the PhC defects, additional features such as tunable (narrow) bandpass filtering as well as (fast) THz intensity modulation can be combined with the reflectivity/coupler properties of the proposed PhC mirrors for FELs.

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“…Photonic crystals (PCs) are periodic structures that allow one to manipulate the flow of light [2]. Most of the publications on THz PC are based on structures comprising semiconductors [6][7][8][9][10], polymers [11] or metals [12]. Tuning of photonic band structures in these PCs is realized by mechanical deformation or filling with different media.…”

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confidence: 99%

Strontium titanate/silicon-based terahertz photonic crystal multilayer stack

et al. 2011

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A one-dimensional photonic crystal working in the terahertz (THz) range was designed and implemented. To facilitate the design, the transmission properties of strontium titanate crystals were characterized by THz-time-domain spectroscopy. Relatively high refractive index (∼18.5) and transmission ratio (0.08) were observed between 0.2 to 1 THz. A stacked structure of (Si d Si /STO d STO ) N /Si d Si was then designed, with transmission spectra calculated by the transfer matrix method. The effects of the filling ratio (d STO /(d Si + d STO )), periodicity (d Si + d STO ) and the number of repeats N on the transmission of PC were investigated. The effect of introducing a defect layer was also studied. Based on these, Si/STO multilayers with STO defect thickness of 125 µm and 200 µm were measured. The shift of the defect mode was observed and compared with the calculations.

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Thermally tunable filter for terahertz range based on a one-dimensional photonic crystal with a defect

Cited by 134 publications

References 24 publications

Stacking the Nanochemistry Deck: Structural and Compositional Diversity in One‐Dimensional Photonic Crystals

Stacking the Nanochemistry Deck: Structural and Compositional Diversity in One‐Dimensional Photonic Crystals

Dynamically tunable mirrors for THz free electron laser applications

Strontium titanate/silicon-based terahertz photonic crystal multilayer stack

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