Manipulating emission of CdTeSe nanocrystals embedded in three-dimensional photonic crystals

Abstract

We report experimental and theoretical results on the photoluminescence of CdTeSe nanocrystals, embedded in a silica opaline structure by infiltration of a highly diluted solution. Strong modification of emission diagrams of embedded nanocrystals have been observed in good agreement with theoretical models. At macroscopic scale, we measured the difference of nanocrystals emission lifetime embedded either in an opal for which the emission is in the gap, or in an opal of smaller balls diameter for which the emission is outside the gap. The photonic bandgap effect leads to a lifetime increase of the order of 10%. These lifetime variations are shown to be in good agreement with the calculated local density of states modification due to the pseudogap.

Spontaneous emission in micro- and nano-structures

“…Their pioneering experiment results proved that 3-D PCs could provide an all-solidstate dynamics control platform for quantum information systems. Lately, Vallée [109] and Vion [25] observed strong modification of emission in opal structures with relatively low dielectric refractivity. Although the experimental progress made in SE control with opals and inverse opals PCs is encouraging, the work wavelength in visible light regime is a limitation for future application in telecommunications.…”

“…Consequently, the PCs can manipulate the emission of emitters. As a result, since the pioneering work of Yablomovitch [17] and John [18], controlling of light emission using PCs has received increasing interest in experiments [19][20][21][22][23][24][25][26][27] and theories [28][29][30][31][32][33][34][35][36][37][38]. Noda's group has been achieving rapid progress in SE control by three- [19] or two-dimensional [39][40][41][42] (3-D or 2-D) PCs.…”

Imprinted Photonic Hydrogels for the Size‐ and Shell‐Selective Recognition of Nanoparticles

“…Figure shows typical SEM images of the used colloidal‐crystal template and the resulting photonic hydrogel film. The optical properties of these materials are those of a photonic crystal, with Bragg diffraction of incident white light owing to the periodicity of the inverse‐opal structure . Reflection spectra of the colloidal‐crystal template of silica particles and the inverse‐opal hydrogel at a specular angle of 20° displayed one intense Bragg peak in the range 500–700 nm (Figure ).…”

Manipulation of the fluorescence of nanocrystals by opal-based heterostructures

“…The nano-emitters were pumped by a cw blue laser diode (wavelength 473 nm, power 100 mW) at fixed incidence. The fluorescence transmitted through the heterostructure was collected by an optical fiber mounted on a rotation 115 stage to change the angle of detection θ (with respect to vertical direction normal to the sample) 18 . The distance between the sample and the fiber was around 10 cm, the size of the illumination spot, 25mm 2 , and the angular resolution, approximately 3°.…”