Photonic crystals of core-shell colloidal particles

Velikov, Krassimir P.; Moroz, Alexander; van Blaaderen, Alfons
January 2002
Applied Physics Letters;1/7/2002, Vol. 80 Issue 1, p49
Academic Journal
We report on the fabrication and optical transmission studies of thin three-dimensional photonic crystals of high-dielectric ZnS-core and low-dielectric SiO[sub 2]-shell colloidal particles. These samples were fabricated using a vertical controlled drying method. The spectral position and width of a stopgap depend on the core-to-shell ratio, in a manner consistent with numerical calculations. Both experiments and calculations show that the relative L-stopgap width in the case of high-index core low-index shell particles can be larger in comparison to the case of homogeneous particles of either material. The core-shell morphology gives additional control over the photonic stopgap characteristics.


Related Articles

  • Self-assembling three-dimensional colloidal photonic crystal structure with high crystalline quality. Ye, Yong-Hong; LeBlanc, Franc¸ois; Haché, Alain; Truong, Vo-Van // Applied Physics Letters;1/1/2001, Vol. 78 Issue 1, p52 

    High-quality colloidal crystal multilayers were fabricated from aqueous solutions by the vertical deposition method. The effect of the evaporation temperature on the crystalline quality of colloidal crystals was carried out. It is found that with the increase of the evaporation temperature, the...

  • Colloidal photonic crystal microchannel array with periodically modulated thickness. Mıguez, H.; Yang, S. M.; Ozin, G. A. // Applied Physics Letters;9/30/2002, Vol. 81 Issue 14, p2493 

    Here we report on the optical properties of a micrometer scale array of periodically modulated thickness colloidal crystals. A combination of soft-lithography, micromolding, and microfluidics techniques is employed to form rectangular microchannels that can impose a periodic modulation of the...

  • Effect of dimensionality on the spectra of hybrid plasmonic-photonic crystals. Romanova, A.; Korovin, A.; Romanov, S. // Physics of the Solid State;Aug2013, Vol. 55 Issue 8, p1725 

    Based on colloidal crystals of various dimensionality, hybrid metal-dielectric plasmonic-photonic heterocrystals have been prepared. It has been shown that the spectra of optical transmission of heterocrystals are mostly controlled by the sum of contributions of composing plasmonic and photonic...

  • The interpretation of dielectric response measurements on colloidal dispersions using the dynamic Stern layer model. Rosen, L. A.; Baygents, J. C.; Saville, D. A. // Journal of Chemical Physics;3/1/1993, Vol. 98 Issue 5, p4183 

    The standard description of electrokinetic phenomena deals with a particle whose charge is uniformly smeared over its surface and considers ion transport only within a Gouy–Chapman diffuse layer. Experimental studies with colloidal dispersions have shown that this model is not applicable...

  • Faraday effect of photonic crystals. Koerdt, C.; Rikken, G. L. J. A.; Petrov, E. P. // Applied Physics Letters;3/10/2003, Vol. 82 Issue 10, p1538 

    We measured Faraday rotation in three-dimensional photonic colloidal crystals impregnated with a Faraday active, transparent liquid. The Faraday effect was found to strongly increase inside the stop band, whereas outside it follows the normal spectral behavior of a paramagnetic dielectric with...

  • Photonic crystals of shape-anisotropic colloidal particles. Velikov, Krassimir P.; van Dillen, Teun; Polman, Albert; van Blaaderen, Alfons // Applied Physics Letters;7/29/2002, Vol. 81 Issue 5, p838 

    Spherical silica (SiO[sub 2]), zinc sulfide (ZnS), and core-shell particles of these materials undergo substantial anisotropic plastic deformation under high-energy ion irradiation. Individual particles can be turned into oblate or prolate ellipsoids with exact control over the aspect ratio. In...

  • The fabrication of photonic band gap materials with a two-dimensional defect. Zhao, Yuxia; Wostyn, Kurt; de Schaetzen, Gaetan; Clays, Koen; Hellemans, Louis; Persoons, Andre; Szekeres, Marta; Schoonheydt, Robert A. // Applied Physics Letters;5/26/2003, Vol. 82 Issue 21, p3764 

    Colloidal crystals with three-dimensional periodicities in the refractive index have a photonic band gap (PBG) in which electromagnetic waves are forbidden. We present a method to fabricate stacked colloidal crystals containing a two-dimensional defect as a middle layer by combining vertical...

  • Pressure controlled self-assembly of high quality three-dimensional colloidal photonic crystals. Zheng, Zhongyu; Liu, Xizhe; Luo, Yanhong; Cheng, Bingying; Zhang, Daozhong; Meng, Qingbo; Wang, Yuren // Applied Physics Letters;1/29/2007, Vol. 90 Issue 5, p051910 

    A concise pressure controlled isothermal heating vertical deposition (PCIHVD) method is developed, which provides an optimal growing condition with better stability and reproducibility for fabricating photonic crystals (PCs) without the limitation of colloidal sphere materials and sizes. High...

  • Spontaneous crystallization of nanocolloids. Karpov, S. V.; Isaev, I. L.; Shabanov, V. F.; Gavrilyuk, A. P.; Grachev, A. S.; Gerasimov, V. S. // Doklady Physics;Feb2009, Vol. 54 Issue 2, p51 

    The article discusses the crystallization of colloidal crystals or periodic colloidal structures (PCSs). It is stated that the nanocolloid crystals represent highly ordered formations consisting of small particles, which are either packed in three dimensional or two dimensional heterostructures....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics