Modeling and Optimization of the Porous Silicon Photonic Structures

Abstract

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Porous Silicon Bragg Reflector/Carbon Dot Hybrids: Synthesis, Nanostructure, and Optical Properties

“…Similar behavior was demonstrated for QDs embedded within PSi-based Bragg reflectors (or deposited on top of PSi Bragg reflectors; Liu et al, 2015 ; He et al, 2017 ; Li et al, 2017 ). Narrowing and shift of the emission spectra were also observed in similar hybrid systems in which QDs were confined within the pores of PSi photonic crystals (Dovzhenko et al, 2018a , b ). For fully oxidized surfaces, this effect is not observed and this behavior may be attributed to the poor contrast between the alternating layers.…”

“…Porous silicon (PSi)-based nanostructures have been widely reported as potential host matrices for light emitting materials, including organic dyes (Palestino et al, 2008 ; Jenie et al, 2014 , 2015 ; Krismastuti et al, 2014 ; Mo et al, 2017 ) and quantum dots (QDs) (DeLouise Lisa and Ouyang, 2009 ; Qiao et al, 2010 ; Gaur et al, 2011 , 2013 ; Dovzhenko et al, 2015 , 2018a ; Liu et al, 2015 ; Dovzhenko D. S. et al, 2016 ; Li et al, 2017 ; Zhang et al, 2017 ). PSi-based photonic crystals hosts [e.g., Bragg reflector (Liu et al, 2015 ; He et al, 2017 ; Li et al, 2017 ) and microcavities (Jenie et al, 2014 , 2015 )] have been shown to affect the propagation and distribution of the light emitted by the guest fluorophores (Pacholski, 2013 ; Dovzhenko D. et al, 2016 ; Dovzhenko D. S. et al, 2016 ).…”

Porous Silicon-Based Photonic Biosensors: Current Status and Emerging Applications

“…As already mentioned, one of the most advantageous properties of PSi is its large surface area (up to 800 m 2 g –1 ) and high internal volume, allowing for numerous biomolecular interactions to occur over a small working area. Furthermore, PSi can serve as a host matrix for diverse compounds and nanomaterials, including polymers, − metals, − quantum dots (QDs), − fluorescent molecules, − graphene oxide (GO), − carbon nanotubes (CNTs), , and carbon dots (C-dots) . The main advantage of these PSi-based hybrid systems is that they can exhibit superior sensing performance in comparison to the individual components, such as signal enhancement, higher sensitivity, improvement of signal stability, and dual-mode detection.…”

“…A comprehensive collaborative study by Chistyakov and Nabiev has demonstrated spectral narrowing of QDs PL after their entrapment within PSi microcavities. , In other studies of these groups, , the effect of the QDs penetration depth into PSi photonic crystals on the PL properties of the host–guest photonic system was investigated. The study involved experimental analysis and theoretical modeling, which confirmed that even a very limited depth of QDs penetration into the PSi-based photonic crystal host leads to significant changes in the QDs luminescence spectrum.…”