Sol-Gel Based Vertical Optical Microcavities with Quantum Dot Defect Layers

Abstract

The interaction between CdSe-CdS-ZnS semiconductor quantum dot emitters (QDs) and sol–gel based asymmetric Bragg microcavities is studied. It is found that the quality factor (Q) of such microcavities is limited by interlayer diffusion. This results in maximum Q values of less than 100. Despite this, these structures still exhibit optical signatures characteristic of the Purcell effect, where large modifications to the photoluminescence properties of QDs are observed

Designable Luminescence with Quantum Dot–Silver Plasmon Coupler

“…Figure e shows that the lifetime of the SSE at 624 nm in the cavity (75.2 ns) is much shorter than that on Ag (103.6 ns). The decreased lifetime in the cavity is consistent with previously reported results of emitters in other types of cavities . The coupling between the QDs and the optical microcavity enhances the radiative decay rate k r of the excitons in the QDs (Purcell effect).…”

Impact of Interfacial Microstructure on Charge Carrier Transport in Solution‐Processed Conjugated Polymer Field‐Effect Transistors

“…Preparation of Dielectric with Sub‐Nanometer Surface Roughness : Dielectric layers (silica thin film) with different R ms were prepared using a similar method to that described by Jasieniak et al TMOS (2 mL) was mixed with ethanol (2 mL) by stirring for 10 min, subsequently hydrolyzed by gradually adding a solution of H 2 O (0.8 mL) and HCl (16 μL, 2 m ), and then heated to 70 °C over 30 min under vigorous stirring. afterward, the heating process was stopped and the solution was aged for 24 h before use.…”

Optical properties of periodic, quasi-periodic, and disordered one-dimensional photonic structures

“…"Fabrication"techniques" Various' techniques' have' been' employed' to' 1D' photonic' crystals' where' reproducible' deposition' of' thin' layers,' is' mandatory' to' achieve' a' high' optical' quality.' Processes' like' ion' implanting' [113],' sol-gel' [114,115],' electronJbeam' evaporation' [116],' Pulsed' Laser' Deposition' [117,118],' PECVD' [119]' and' sputtering' [120][121][122][123]' can' be' successfully' employed' for'the'fabrication'of'microcavities'based.' Anyway' the' deposition' protocols' have' to' careful' be' tailored' on' the' particular' materials' employed' and' possible' application' of' the' fabricated' system.'…”