Topic
Optical microcavity
About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.
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TL;DR: In this article, the optical length between the two mirrors was set according to the scale of the luminescent wavelength in order to compose a microcavity structure for organic thin films sandwiched between two mirrors.
Abstract: The luminescent characteristics of organic thin films sandwiched between two mirrors were measured. The optical length between the two mirrors was set according to the scale of the luminescent wavelength in order to compose a microcavity structure. Photoluminescence (PL) and electroluminescence (EL) from tris(8-hydroxyquinoline)aluminum (ALQ) were enhanced at distinct resonating wavelengths, and suppressed in other regions. Then, narrow and enhanced luminescent peaks were observed from the devices with the microcavity structure. Based on their injection current dependence, the primary cause of these spectra was speculated to be spontaneous emission. An EL sample with the microcavity structure for multicolor emissions was fabricated.
11 citations
TL;DR: In this article, a microcavity that consists of an emissive layer, a filler layer and resonator mirrors was modeled as a Fabry-Perot resonator.
Abstract: In a microcavity that consists of an emissive layer, a filler layer and resonator mirrors, we observed the emission enhancement with a higher photoluminescence (PL) intensity and a narrower linewidth than those of the noncavity type. The modification of the PL characteristics by the microcavity structure is described using the model that treats the microcavity as a Fabry–Perot resonator and regards the emissive material as an assembly of emitting dipoles. Also, we obtained the reflectivity and the phase shift of the distributed feedback (DFB) mirror using an optical transfer matrix formalism. The optical constants of the photoluminescent polymer, OxdEH-PPV, are obtained by measuring the interferometric fringe for the reference wavelength (633 nm) and then by applying the subtractive Kramers–Kronig transformation to the absorption spectrum and the reference refractive index. In order to attain the optical feedback as well as the PL excitation, we fabricated the aluminum and DFB mirrors. The DFB mirror was prepared by evaporating an alternating stack of quarter-wave TiO2 (nH) and SiO2 (nL) layers onto the glass plate.
11 citations
TL;DR: In this paper, the authors studied the Purcell spontaneous emission enhancement provided by a novel type of microcavity that formed a fully buried, all-epitaxial semiconductor heterostructure.
Abstract: Using time-resolved photoluminescence spectroscopy, we have studied the Purcell spontaneous emission enhancement provided by a novel type of microcavity that forms a fully buried, all-epitaxial semiconductor heterostructure. The quantum dot containing region and the cavity boundaries are simultaneously defined in a unique way and lead to spatially self-aligned emitters. We demonstrate post-growth control of the quality factor and the capability of directly imaging the spatial field distribution that critically impacts the Purcell effect.
11 citations
TL;DR: In this paper, the dispersion law for lower and upper cavity plasmon polaritons is obtained and the role of Dirac-like spinor wave functions in graphene and corresponding angle factors are considered.
11 citations
TL;DR: In this article, up to 75 times enhancement in emission from lithographically produced photonic crystals with postprocessing close-packed colloidal quantum-dot incorporation is reported, which is consistent with all their observations.
Abstract: We report up to 75 times enhancement in emission from lithographically produced photonic crystals with postprocessing close-packed colloidal quantum-dot incorporation. In our analysis, we use the emission from a close-packed free-standing film as a reference. After discounting the angular redistribution effect, our analysis shows that the observed enhancement is larger than the combined effects of Purcell enhancement and dielectric enhancement with the microscopic local field. The additional enhancement mechanisms, which are consistent with all our observations, are thought to be spectral diffusion mediated by phonons and local polarization fluctuations that allow off-resonant excitons to emit at the cavity wavelengths.
11 citations