Near-Infrared-Responsive Photoelectrochemical Aptasensing Platform Based on Plasmonic Nanoparticle-Decorated Two-Dimensional Photonic Crystals

2019 ◽  
Vol 11 (24) ◽  
pp. 21417-21423 ◽  
Author(s):  
Zhenzhen Li ◽  
Xue Zhou ◽  
Jing Yang ◽  
Baihe Fu ◽  
Zhonghai Zhang
Keyword(s):  
Photonic Crystals ◽  
Near Infrared ◽  
Two Dimensional ◽  
Plasmonic Nanoparticle

Ge/Si self-assembled Islands for Photonics Applications

2006 ◽  
Vol 958 ◽  
Author(s):  
Philippe Boucaud ◽  
Moustafa El Kurdi ◽  
Xiang Li ◽  
Sébastien Sauvage ◽  
Xavier Checoury ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Quantum Wells ◽  
Valence Band ◽  
Near Infrared ◽  
Structural Parameters ◽  
Buffer Layers ◽  
Two Dimensional ◽  
Recombination Energy ◽  
Optical Modes ◽  
Self Assembled

ABSTRACTWe first present an analysis of the band line-up in the case of SiGe/Si quantum wells and in the case of SiGe/Si self-assembled islands. The conduction and valence band diagrams are obtained from a 30 band k.p Hamiltonian which allows to describe simultaneously conduction and valence band states. The strain field is obtained from a microscopic valence force field theory. The band edge alignment is strongly dependent on the input parameters for this heterosystem. We determine the average valence band offset from photoluminescence measurements of heterostructures grown on relaxed SiGe buffer layers. A type II band line-up is calculated for all Ge compositions in the case of two-dimensional quantum wells and SiGe/Si self-assembled islands. The 30-band formalism allows the determination of the near-infrared interband recombination energy as a function of the self-assembled island structural parameters. We then present recent results obtained by embedding SiGe/Si self-assembled islands in two-dimensional photonic crystals. The photoluminescence of GeSi islands acts as an internal probe to characterize the optical properties of silicon-based two-dimensional photonic crystals designed for the near-infrared spectral range. Cavities, defect-free photonic crystals operated at the second Bragg order and two-dimensional photonic crystals fabricated on top of one-dimensional Bragg mirrors (2D + 1D) are described. We show that, in the case of 2D +1D structures, we can control the quality factor of optical modes at the second Bragg order by matching the resonance conditions and controlling the thickness of the layers. Photonic crystals with pure Ge layers are finally described.

scholarly journals Two-dimensional Au & Ag hybrid plasmonic nanoparticle network: broadband nonlinear optical response and applications for pulsed laser generation

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2537-2548
Author(s):  
Hongkun Nie ◽  
Wenchao Duan ◽  
Junting Liu ◽  
Haibing Xia ◽  
Kejian Yang ◽  
...  
Keyword(s):  
Metallic Nanoparticles ◽  
Nonlinear Optical ◽  
Near Infrared ◽  
Optical Switch ◽  
Relaxation Times ◽  
Localized Surface Plasmon ◽  
Laser Generation ◽  
Two Dimensional ◽  
Ag Nps ◽  
Plasmonic Nanoparticle

AbstractLocalized surface plasmon resonance (LSPR) of metallic nanoparticles (NPs) can generate and enhance the nonlinear optical (NLO) response and has been widely used in biosensing, optical bistability, optical switch, and modulator, surface-enhanced spectroscopies, etc. Here, the two-dimensional (2D) Au & Ag hybrid plasmonic NP network (Au & Ag HPNN) were synthesized by assembling Au and Ag NPs in ethanol solvent and transferring onto a CaF2 substrate. The frequency-domain finite element method (FEM) simulations were performed to explore their LSPR properties, demonstrating the broadband optical responses throughout visible, near-infrared and mid-infrared regions. The ultrafast carrier relaxation times were determined to be 3.9, 5.6, and 8.6 ps, while the nonlinear absorption coefficients were −1.12 × 104, −1.71 × 104, and −2.54 × 104 cm/GW, respectively, for the three wavelengths matching the LSPRs peaks at 1.0, 2.0, and 3.0 μm bands. Furthermore, passively Q-switched (PQS) solid-state lasers operating at 1062.8, 1990.8, and 2947 nm were demonstrated with 2D Au & Ag HPNN based saturable absorbers. This work not only reveals desirable ultrafast broadband NLO responses of 2D HPNN, but also provides a platform for investigating their applications in nanophotonic devices.

Measuring the optical properties of two-dimensional photonic crystals in the near infrared

1999 ◽  
pp. 406-425
Author(s):  
D. Labilloy ◽  
H. Benisty ◽  
C. Weisbuch ◽  
T. F. Krauss ◽  
C. J. M. Smith ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Near Infrared ◽  
Two Dimensional

Two-dimensional ring-type photonic crystals in the near-infrared region

2004 ◽  
Vol 13 (9) ◽  
pp. 1474-1476 ◽  
Author(s):  
Xu Xing-Sheng ◽  
Wang Yi-Quan ◽  
Han Shou-Zheng ◽  
Cheng Bing-Ying ◽  
Zhang Dao-Zhong
Keyword(s):  
Photonic Crystals ◽  
Near Infrared ◽  
Infrared Region ◽  
Two Dimensional ◽  
Ring Type ◽  
Near Infrared Region

Numerical Study on Two-dimensional Magnetic Photonic Crystals Made of Magnetized Ferrites

PIERS Online ◽  
2007 ◽  
Vol 3 (3) ◽  
pp. 305-307 ◽  
Author(s):  
Jie Xu ◽  
Ping Chen ◽  
Yue Shi ◽  
Xin-Yi Ji ◽  
Ai-Min Jiang ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Numerical Study ◽  
Two Dimensional ◽  
Magnetic Photonic Crystals

DESIGN OF Y SHAPED 2x1 ENCODER USING TWO DIMENSIONAL PHOTONIC CRYSTALS

2019 ◽  
Vol 7 (1) ◽  
pp. 12
Author(s):  
K. LATHA ◽  
R. ARUNKUMAR ◽  
S. ROBINSON ◽  
◽  
◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Two Dimensional
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