Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Romanov, S. G.; Bardosova, Maria; Whitehead, Debra; Povey, Ian M.; Pemble, Martyn E.; Torres, C. M. Sotomayor

doi:10.1063/1.2714198

Cited by 51 publications

(42 citation statements)

References 21 publications

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“…The reflection spectrum has a full width at half maximum (FWHM) of 46 nm. The Fabry-Perot oscillations on either side of the reflection peak provide an estimate of 28 layers for the ordered crystal [10]. The reflection spectrum of the crystal shows the expected shift towards the lower wavelength range for larger angles of incidence, indicating pseudo band gap nature.…”

Section: Resultsmentioning

confidence: 96%

Laser emission from self-assembled active photonic crystal matrix

et al. 2010

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Abstract. Three-dimensionally ordered photonic crystals were grown using self-assembly technique from Rhodamine-B dye doped polystyrene micro-spheres resulting in a stop band at 611 nm overlapping the emission spectrum of the dye. When excited at a wavelength away from the stop band, using a frequency-doubled Nd:YAG laser, the crystal showed angledependent suppression of spontaneous emission of the dye in the wavelength range of the photonic stop band and enhancement at the band edge, in reflection and transmission geometries. Spectral narrowing, a sharp threshold and a highly directional emission, all indicative of stimulated emission, were observed from the active photonic crystal matrix.

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Section: Resultsmentioning

confidence: 96%

Laser emission from self-assembled active photonic crystal matrix

et al. 2010

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“…The thickness (t) [35] obtained from the Fabry-Perot (F-P) fringes, in the long wavelength limit, is 9 μm (~35 ordered layers) or t = 3.9L B . This indicates that the crystals are strongly interacting and the finite-size effects are minimized in the direction of propagation.…”

Section: Optical Reflectivity a Along γL Directionmentioning

confidence: 99%

Polarization-selective branching of stop gaps in three-dimensional photonic crystals

Priya

Nair

2016

Phys. Rev. A

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We study the direction-and wavelength-dependent polarization anisotropy in light scattering at the air-photonic crystal interface as a function of angle of incidence for TE and TM polarized light. This is done using optical reflectivity measurements at high-symmetry points in the Brillouin zone of a three-dimensional photonic crystal with fcc symmetry. Polarized reflectivity measurements indicate the presence of stop gap branching for TE polarization, which is absent for TM polarization till the Brewster angle at K point. In contrast, stop gap branching is present for both TE and TM polarizations at W point due to the intricate mixing of crystal planes. This characteristic behavior signifies the inevitable role of energy exchange in the stop gap branching.The measured polarization anisotropy shows a prominent shift in the Brewster angle for onresonance wavelength as compared to the off-resonance along both K and W points, and that, in accordance with theory. Our results have implications in polarization-induced light scattering in sub-wavelength photonic structures like plasmonic crystals, and meta-materials.

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“…This can be understood as follows. The constructive interference takes place, Bragg-Snell formula can be written as [16][17][18] …”

Section: Resultsmentioning

confidence: 99%

Optical and magnetic properties of PAA@Fe nanocomposite films

et al. 2013

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A simple method to fabricate porous anodic alumina films embedded with Fe is reported. The films exhibit vivid structural colors and magnetic properties after being synthesized by an ac electrodeposition method. The optical properties of the samples can be effectively tuned by varying the oxidation time of aluminum. The coercivity mechanism of the Fe nanowires in our case is consistent with fanning reversal mode. PAA@Fe films can be used in many areas including decoration, display and multifunctional anti-counterfeiting applications. C 2013 Author(s)

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Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Cited by 51 publications

References 21 publications

Laser emission from self-assembled active photonic crystal matrix

Laser emission from self-assembled active photonic crystal matrix

Polarization-selective branching of stop gaps in three-dimensional photonic crystals

Optical and magnetic properties of PAA@Fe nanocomposite films

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