Imaging of photonic crystal slabs with non-ideal effective refractive index

2008 ◽  
Author(s):  
Guilin Sun ◽  
Andrew G. Kirk
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Effective Refractive Index ◽  
Photonic Crystal Slabs

Effective Refractive Index of a Finite One-Dimensional Photonic Crystal

2010 ◽  
Vol 39 (s1) ◽  
pp. 48-53
Author(s):  
褚博文 CHU Bo-wen ◽  
赵丽明 ZHAO Li-ming ◽  
赵静 ZHAO Jing
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Effective Refractive Index ◽  
One Dimensional ◽  
Dimensional Photonic Crystal

scholarly journals A Photonic crystal fiber with large effective refractive index separation and low dispersion

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0232982
Author(s):  
Zhihao Geng ◽  
Ning Wang ◽  
Keyao Li ◽  
Hui Kang ◽  
Xun Xu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Effective Refractive Index ◽  
Crystal Fiber ◽  
Low Dispersion

Measurement of Effective Negative Refractive Index of Two-Dimensional Photonic Crystal Slabs

2017 ◽  
Vol 37 (6) ◽  
pp. 0616001
Author(s):  
蒋 强 Jiang Qiang ◽  
陈家璧 Chen Jiabi ◽  
梁斌明 Liang Binming ◽  
王 燕 Wang Yan ◽  
庄松林 Zhuang Songlin
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Negative Refractive Index ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Photonic Crystal Slabs ◽  
Two Dimensional Photonic Crystal

scholarly journals Flexible photonic crystal membranes with nanoparticle high refractive index layers

2017 ◽  
Vol 8 ◽  
pp. 203-209 ◽  
Author(s):  
Torben Karrock ◽  
Moritz Paulsen ◽  
Martina Gerken
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Particle Concentration ◽  
High Refractive Index ◽  
Titanium Dioxide Nanoparticle ◽  
High Tunability ◽  
Nanoparticle Layer ◽  
Guided Mode ◽  
Resonance Shift ◽  
Photonic Crystal Slabs

Flexible photonic crystal slabs with an area of 2 cm2 are fabricated by nanoimprint replication of a 400 nm period linear grating nanostructure into a ≈60 µm thick polydimethylsiloxane membrane and subsequent spin coating of a high refractive index titanium dioxide nanoparticle layer. Samples are prepared with different nanoparticle concentrations. Guided-mode resonances with a quality factor of Q ≈ 40 are observed. The highly flexible nature of the membranes allows for stretching of up to 20% elongation. Resonance peak positions for unstretched samples vary from 555 to 630 nm depending on the particle concentration. Stretching results in a resonance shift for these peaks of up to ≈80 nm, i.e., 3.9 nm per % strain. The color impression of the samples observed with crossed-polarization filters changes from the green to the red regime. The high tunability renders these membranes promising for both tunable optical devices as well as visualization devices.

Photonic crystal fiber with W-type effective refractive index profile

Optik ◽  
2013 ◽  
Vol 124 (16) ◽  
pp. 2309-2312 ◽  
Author(s):  
Hongwei Chen ◽  
Shengping Chen ◽  
Jing Hou ◽  
Qisheng Lu
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Effective Refractive Index ◽  
Refractive Index Profile ◽  
Index Profile ◽  
Crystal Fiber

scholarly journals Synthesis and properties of SiO2 photonic crystals modified by DNA

2020 ◽  
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Electric Field ◽  
Band Gap ◽  
Effective Refractive Index ◽  
Fdtd Method ◽  
Optical Parameters ◽  
Globular Photonic Crystal ◽  
The Creation

Background: Photonic crystals are structures characterized by periodic modulations of the refractive index with a period commensurate with the wavelength. This periodicity is associated with the existence of a complete band gap in the spectrum of the electromagnetic states of the crystal. The stop zone is called the band gap for the highlighted direction in the crystal. Globular photonic crystals are called three-dimensional photonic crystals, which consist of the same diameter globules. The pores between the globules in the opal allow one to change the refractive index and optical contrast of the material. The task of controlling the stop-zone frequency limits of a globular photonic crystal without changing its physical structure is of practical interest. The easiest way to control the stop-zone parameters is to fill the pores of the photonic crystals with materials with different refractive indices, for example, DNA. Control of the optical parameters of a globular photonic crystal can be used for the creation of optical detectors, sensors, test systems, a quantum biocomputer as well as analyzing and studying a conformational state of DNA. Objectives: the creation of SiO2 globular photonic crystals modified by DNA and studying of the influence of DNA on their optical properties. Materials and Methods: Ethyl alcohol, distilled water, ammonium hydroxide, tetraethoxysilane and DNA were used to synthesize SiO2 photonic crystals. Aqueous DNA solution was used to infiltrate the photonic crystals. We used a visible range spectroscopy for optical experiments and a finite-difference time-domain (FDTD) method for numerical calculations. Results: SiO2 globular photonic crystals modified by DNA were synthesized with 195 nm globules. The reflection spectra of the obtained photonic crystals were measured. A red-shift of the stop-zone maximum after the infiltration of photonic crystals with DNA molecules was found. The electric field distribution was calculated for the photonic crystal with 200 nm globules. Conclusions: FDTD calculations in the linear mode show that the presence of point defects in the structure of the photonic crystal influences the amplification of the local electric field in the interglobular space of the photonic crystal, which houses the DNA molecule at infiltration. The DNA infiltration into the pores of a photonic crystal changes the effective refractive index of the system by 5.99%. Synthesis SiO2 photonic crystals with DNA leads to the formation of a more ordered structure at the macro levels. Thus, DNA serves as a template-like structure for photonic crystals to be assembled on. In this case, the effective refractive index of the system increases by 6.01%.

Sign in / Sign up

Export Citation Format

Share Document