Rugate Filters By Laser Flash Evaporation Of SiO   x   N   y    On Room Temperature Polycarbonate

Bartholomew, C. S.; Betz, H.; Grieser, J. L.; Spence, R. A.; Murarka, N. P.

doi:10.1117/12.941858

Cited by 5 publications

(4 citation statements)

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“…1 with a large R , can be realized in many different ways. Some of the techniques include, fabrication of porous silicon via electrochemical anodization with varying current density 25 , deposition of a dual periodic multilayer using a logical combination technique 19 , holographic interferometry, that make uses laser beam interferences on photosensitive materials 26 , and the deposition of silicon oxynitride with varying stoichiometry of oxygen and nitrogen 27 28 .…”

Section: Dps As a Metamaterials Cavitymentioning

confidence: 99%

“…As we have mentioned in the metamaterial cavity section, the DPS with the dielectric function as in Eqn. 1 can be implemented in many different ways 25 26 27 28 . Most of these methods generates continuous dielectric profile, and therefore they have two important limitations: 1) generating structures with large dielectric modulations (i.e., large ); 2) generating structures that are amenable for mass production via lithographical techniques.…”

Section: Constructing a High Dielectric Contrast Dpsmentioning

confidence: 99%

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Doubly Resonant Optical Periodic Structure

Alagappan

Png

2016

Sci Rep

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Periodic structures are well known in various branches of physics for their ability to provide a stopband. In this article, using optical periodic structures we showed that, when a second periodicity – very closed to the original periodicity is introduced, large number of states appears in the stopband corresponding to the first periodicity. In the limit where the two periods matches, we have a continuum of states, and the original stopband completely disappears. This intriguing phenomena is uncovered by noticing that, regardless of the proximities of the two periodicities, there is an array of spatial points where the dielectric functions corresponding to the two periodicities interfere destructively. These spatial points mimic photonic atoms by satisfying the standards equations of quantum harmonic oscillators, and exhibit lossless, atom-like dispersions.

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Section: Dps As a Metamaterials Cavitymentioning

confidence: 99%

Section: Constructing a High Dielectric Contrast Dpsmentioning

confidence: 99%

Doubly Resonant Optical Periodic Structure

Alagappan

Png

2016

Sci Rep

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“…These structures have been investigated for 20 years, because a smooth index profile can improve many features of optical devices with respect to dielectric multilayers. The main difficulty is their experimental achievement, which requires the gradual mixing of two different materials; rugate filters obtained by evaporation, 13,14 reactive sputtering, 15 plasma-enhanced chemical-vapor deposition, 16 and glancing angle deposition 17 were reported in the past. Birefringent rugate filters have been reported too.…”

Section: Introductionmentioning

confidence: 99%

Porous silicon-based rugate filters

et al. 2005

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We report an experimental study of porous silicon-based rugate filters. We performed filter apodization, following a half-apodization approach, which successfully attenuated the sidelobes at both sides of the photonic stop band. We achieved successful reduction of interference ripples through the insertion of index-matching layers on the first and last interfaces. An apodized dielectric mirror and a rugate filter are compared: Appreciable differences in the harmonic presence and stop-band performance were observed and are commented on. Bandwidth control when index contrast is modified is also demonstrated. Finally, the possibility of combining different rugate filter designs to attain more complex responses is demonstrated by the achievement of a multi-stop-band filter. Numerical calculations for design optimization and comparison with experimental data are reported too.

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“…The adjustable refractive index of mixed films simplifies the optical thin-film design. Mixed film techniques have been used in many areas of optical thin-film application such as integrated optical waveguides, 1,2 rugate filters, [3][4][5] antireflection and notch filters. 6,7 The properties of mixed films such as structure, refractive index, and composition depend on the deposition process and the material.…”

Section: Introductionmentioning

confidence: 99%

Mixed films of TiO_2–SiO_2 deposited by double electron-beam coevaporation

et al. 1996

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We used double electron-beam coevaporation to fabricate TiO(2)-SiO(2) mixed films. The deposition process included oxygen partial pressure, substrate temperature, and deposition rate, all of which were real-time computer controlled. The optical properties of the mixed films varied from pure SiO(2) to pure TiO(2) as the composition of the films varied accordingly. X-ray diffraction showed that the mixed films all have amorphous structure with a SiO(2) content of as low as 11%. Atomic force microscopy showed that the mixed film has a smoother surface than pure TiO(2) film because of its amorphous structure.

Linear and Bruggeman's effective medium approximation models fit the experimental data better than other models.

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Rugate Filters By Laser Flash Evaporation Of SiO x N y On Room Temperature Polycarbonate

Cited by 5 publications

References 0 publications

Doubly Resonant Optical Periodic Structure

Doubly Resonant Optical Periodic Structure

Porous silicon-based rugate filters

Mixed films of TiO_2–SiO_2 deposited by double electron-beam coevaporation

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