Photoluminescence of ZnS:Mn embedded in three-dimensional photonic crystals of submicron polymer spheres

Zhou, Ji; Zhou, Yun-Song; Buddhudu, S.; Ng, S.L.; Lam, Yee Loy; Kam, C. H.

doi:10.1063/1.126691

Cited by 89 publications

(51 citation statements)

References 14 publications

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“…As an important wide-gap semiconductor material (3.68 eV) of the metal sulfides, ZnS has been studied extensively for its wide optical applications [4]. In recent years, nanoscaled ZnS crystals attracted more and more attention because of their quantum confinement effect and size-and shape-dependent photoemission characteristics [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis of thioglycolic acid capped ZnS(Pn)0.5 nanotubes via simple aqueous solution route at low temperatures and conversion to wurtzite ZnS nanorods via thermal decompose of precursor

Salavati‐Niasari

Davar

Loghman-Estarki

2010

Journal of Alloys and Compounds

121

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Section: Introductionmentioning

confidence: 99%

Controllable synthesis of thioglycolic acid capped ZnS(Pn)0.5 nanotubes via simple aqueous solution route at low temperatures and conversion to wurtzite ZnS nanorods via thermal decompose of precursor

Salavati‐Niasari

Davar

Loghman-Estarki

2010

Journal of Alloys and Compounds

121

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“…[1][2][3][4][5][6][7][8][9][10][11][12] When the photonic crystal is loaded with QDs that possess nonlinear optical properties, the nanoparticles impart a photorefractivity to the PCC and as a result, allow lightinduced control of transmission through the crystal. This feature offers a promising route to all-optical limiting and switching.…”

Section: Introductionmentioning

confidence: 99%

High‐Quality Photonic Crystals Infiltrated with Quantum Dots

Paquet

Yoshino

Levina

et al. 2006

Adv Funct Materials

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We report a method for producing colloidal crystals heavily loaded with PbS quantum dots (QDs). The approach employed uses capillary forces to load the QDs in the interstitial voids of the colloid crystals and yields highly ordered structures with a high loading of QDs. The infiltration process is qualitatively monitored using confocal fluorescence microscopy and scanning electron microscopy. The optical properties of the resulting composite structure are examined using optical spectroscopy. The shift in the stopband resulting from the infiltration of the colloid crystal shows that the PbS QDs occupy nearly 100 % of the volume of the interstitial space.

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“…The inhibited spontaneous emission (SE) in a periodic dielectric structure was observed firstly by Martorell and Lawandy in 1990 [3], which however was attributed to the chemical interaction later on [4]. Since then, there have been a variety of experimental reports on the topics ranging from the modulation of the emission intensity at spectral position [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] to the change of the radiative lifetime [22][23][24]. Controlling over SE of light is crucial for many applications including miniature lasers, light-emitting diodes [25], and solar cells [26].…”

mentioning

confidence: 99%

Observation of modulated spontaneous emission of Rhodamine 6G in low refractive index contrast 1D-periodic gelatin film

Zhang

Wang

et al. 2010

Sci. China Phys. Mech. Astron.

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The modulation of the spontaneous emission of Rhodamine 6G has been observed in one-dimensional periodic dielectric structure of dichromated gelatin film with refractive index contrast as low as 0.01. The spontaneous emission is enhanced at the band edges and inhibits in the band gap, which agree well with the theoretical analysis on the redistribution of the fractional local density of optical states. density of states, refractive index contrast, spontaneous emissionThe study on the photoluminescence (PL) of photonic crystals (PCs) has been an attractive topic since the modification of emission or absorption properties of atoms or molecules within PCs was reported in 1987 [1, 2]. The inhibited spontaneous emission (SE) in a periodic dielectric structure was observed firstly by Martorell and Lawandy in 1990 [3], which however was attributed to the chemical interaction later on [4]. Since then, there have been a variety of experimental reports on the topics ranging from the modulation of the emission intensity at spectral position [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] to the change of the radiative lifetime [22][23][24]. Controlling over SE of light is crucial for many applications including miniature lasers, light-emitting diodes [25], and solar cells [26].In 2005, a systematical analysis by Barth et al. gave a clear explanation on the SE modulation by introducing a spectral and angular redistribution of the density of states (DOS) inside the PCs [27]. The corresponding experiment was realized in the synthetic opals colloidal PCs, both the radiative lifetime and PL spectra were successfully modified and analyzed by fractional local DOS (FLDOS). However, the fabrication of such kind of samples was quite laborious, and the spectral behavior in opals showed a strong dependence on the exact location of dye molecules. On the other hand, periodic structures can be easily induced by optical methods in holographic recording materials such as dichromated gelatin, photorefractive materials, photopolymers, and etc. [28][29][30]. However, the modification of SE in such materials is seldom investigated due to the low modulation of refractive indices.In this paper, we investigate the SE modulation of Rhodamine 6G dye (R6G) in a 1D-periodic dichromated gelatin film with relatively low refractive index contrast. The 1D-periodic structures were fabricated in photosensitive dichromated gelatin film by two-wave coupling. Although the contrast of the refractive index in our experiments was as low as 0.01, evident frequency-dependent modulation of the SE has been observed and the emission spectra exhibit an angular dependence. To the best of our knowledge, it is the first time to experimentally realize the modification of SE in periodic structures with such low refractive index contrast. The redistribution of FLDOS is introduced to explain such modulation successfully. The enhanced emission at the band edge is promising in applications of plane laser

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Photoluminescence of ZnS:Mn embedded in three-dimensional photonic crystals of submicron polymer spheres

Cited by 89 publications

References 14 publications

Controllable synthesis of thioglycolic acid capped ZnS(Pn)0.5 nanotubes via simple aqueous solution route at low temperatures and conversion to wurtzite ZnS nanorods via thermal decompose of precursor

Controllable synthesis of thioglycolic acid capped ZnS(Pn)0.5 nanotubes via simple aqueous solution route at low temperatures and conversion to wurtzite ZnS nanorods via thermal decompose of precursor

High‐Quality Photonic Crystals Infiltrated with Quantum Dots

Observation of modulated spontaneous emission of Rhodamine 6G in low refractive index contrast 1D-periodic gelatin film

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