Genetic Algorithm-Assisted Design of Sandwiched One-Dimensional Photonic Crystals for Efficient Fluorescence Enhancement of 3.18-μm-Thick Layer of the Fluorescent Solution

Abstract

One-dimensional photonic crystal structures have been widely used to enhance fluorescence. However, its fluorescence enhancement is low-fold because of a weak excitation field region. In this paper, we used a genetic algorithm to assist in the design of two photonic crystals based on Al2O3 and TiO2 materials. One of them has a defect consisting of SiO2. The Fabry-Perot cavity (FP cavity) formed by the sandwiched photonic crystal achieves up to 14-fold enhancement of the excitation electric field. We modulate the electric field radiation distribution of the fluorescent material by using photonic forbidden bands. For a 3.18 μm thick layer of the fluorescent solution, the structure achieves up to 60-fold fluorescence enhancement. We also discussed that the reason for the different enhancement abilities in different places is the phase change caused by the optical path difference. This design is expected to have applications in display, imaging, etc.

Plasmonic Fluorescence Sensors in Diagnosis of Infectious Diseases

“…A genetic algorithm was used to design two photonic crystals using Al 2 O 3 and TiO 2 , with one crystal containing SiO 2 . The sandwiched crystal formed a Fabry–Perot cavity, achieving 14-fold excitation enhancement [ 210 ]. By controlling electric field radiation using photonic forbidden bands, fluorescence in a 3.18 µm layer was enhanced by 60 fold.…”

Photonic crystal cavity-mediated improved absorptive nonlinearity of C-4-hydroxy-3-methoxphenilcalix[4]resorcinarene

“…8,9 The radiative rate of fluorescent materials can be tuned by the localized electric field confined inside a planar microcavity. [10][11][12] Topologically engineered photonic crystal structures are efficient platforms for lasing action, wherein emission is achieved at a relatively low pump threshold. 13,14 Photonic band gap (PBG) structures are the right candidate to fabricate devices ranging from microwaves to the visible range of the electromagnetic spectrum.…”

“…8,9 The radiative rate of fluorescent materials can be tuned by the localized electric field confined inside a planar microcavity. 10–12 Topologically engineered photonic crystal structures are efficient platforms for lasing action, wherein emission is achieved at a relatively low pump threshold. 13,14…”