Tunable enhanced Faraday rotation in a defected plasma photonic crystal under external magnetic ﬁeld with different declinations

The carbon-encapsulated superparamagnetic colloidal nanoparticles (SCNps) were rigidized into soft solids by embedding the SCNps into polyacrylamide hydrogel matrixes under the induction of an external magnetic field. Stabilized by the balance of attractive (magnetic) and repulsive (electrostatic) forces, the SCNps form one-dimension photonic crystal structures along the direction of the external magnetic field and further the structures are frozen into the solidified polymer matrix. The polymer matrix embedded one-dimension photonic crystal structures can strongly diffract visible light and present brilliant color in the light. This novel and soft solid polymer matrix that could be shaped and sliced not only paves a new avenue for develop novel magnetic-responsive photonic crystal materials and devices, but also provides a method to observe the magnetic-induced self-assembly structures of the SCNps in media such as polyacrylamide hydrogel matrixs as a result of the ordered structures frozen into the polyacrylamide hydrogel matrixs. So we can reveal the relationship between their structure and color, and furthermore permit a systematic exploration on magnetically induced self-assembling dynamics, colloidal crystallography which have important significance in the large-scale industrial production in the future.

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Nonreciprocal and enhancement effect of one-dimensional magnetic photonic crystal with a gain defect

International Journal of Modern Physics B ◽

10.1142/s0217979219500346 ◽

2019 ◽

Vol 33 (06) ◽

pp. 1950034

Author(s):

Yi-Heng Wu ◽

Yun-Tuan Fang

Keyword(s):

Magnetic Field ◽

Photonic Crystal ◽

External Magnetic Field ◽

Incident Angle ◽

Gain Coefficient ◽

Defect Layer ◽

Gain Medium ◽

Enhancement Effect ◽

One Dimensional ◽

Transmission Properties

The transmission properties of one-dimensional photonic crystal composed of the Gyromagnetic and gain medium are investigated. The energy loss due to the Gyromagnetic medium is compensated by adding one gain defect layer. From the analysis, it is found that both the nonreciprocal and enhancement effect are affected considerably by the incident angle, layer thickness, external magnetic field and gain coefficient. Specifically, it is demonstrated that the gain defect layer plays an important role in achieving nonreciprocal and enhancement transmission.

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Influence of external magnetic field on high-harmonic generation upon propagation of an ultrashort optical airy pulse in a CNTs photonic crystal

International Journal of Modern Physics B ◽

10.1142/s021797922150017x ◽

2020 ◽

pp. 2150017

Author(s):

Y. V. Dvuzhilova ◽

I. S. Dvuzhilov ◽

N. N. Konobeeva ◽

M. B. Belonenko

Keyword(s):

Magnetic Field ◽

Photonic Crystal ◽

External Magnetic Field ◽

Cross Section ◽

Optical Pulse ◽

High Harmonic ◽

Three Dimensional ◽

Ultrashort Optical Pulse ◽

Limited Region ◽

High Harmonics

In this paper, we consider the influence of magnetic pump field on the propagation of three-dimensional ultrashort optical pulse with Airy cross-section in a medium of a photonic crystal made of carbon nanotubes (CNTs). It is shown, that the pulse remains localized in a limited region of space and propagates quasi-stable. The possibility of efficient generation of high harmonics under the influence of an external magnetic field that were initially absent is observed.

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Magnetic-Field Dependence of Effective Plasma Frequency for a Plasma Photonic Crystal

IEEE Photonics Journal ◽

10.1109/jphot.2013.2241417 ◽

2013 ◽

Vol 5 (1) ◽

pp. 4700110-4700110 ◽

Cited By ~ 11

Author(s):

Tzu-Chyang King ◽

Wen-Kai Kuo ◽

Tzong-Jer Yang ◽

Tingting Bian ◽

Chien-Jang Wu

Keyword(s):

Magnetic Field ◽

Photonic Crystal ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Plasma Frequency ◽

Plasma Photonic Crystal ◽

Effective Plasma Frequency

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Slow Light Rainbow Trapping in a Uniformly Magnetized Gyromagnetic Photonic Crystal Waveguide

Frontiers in Materials ◽

10.3389/fmats.2021.728991 ◽

2021 ◽

Vol 8 ◽

Author(s):

Jianfeng Chen ◽

Qiumeng Qin ◽

Chaoqun Peng ◽

Wenyao Liang ◽

Zhi-Yuan Li

Keyword(s):

Magnetic Field ◽

Photonic Crystal ◽

External Magnetic Field ◽

High Performance ◽

Slow Light ◽

Optical Switch ◽

Optical Filter ◽

Waveguide Channel ◽

Edge States ◽

Time Domains

We present a hybrid gyromagnetic photonic crystal (GPC) waveguide composed of different GPC waveguide segments possessing various cylinder radii and waveguide widths but biased by a uniform external magnetic field. We demonstrate in frequency and time domains that based on the strong coupling of two counter-propagating topologically protected one-way edge states, the intriguing slow light rainbow trapping (SLRT) of electromagnetic (EM) waves can be achieved, that is, EM waves of different frequencies can be slowed down and trapped at different positions without cross talk and overlap. More importantly, due to the existence of one-way edge states, external EM waves can be non-reciprocally coupled to the SLRT waveguide channel, although the incident position of the EM wave is far away from the waveguide channel. Besides, the frequency range of the slow light states can also be easily regulated by tuning the intensity of an external magnetic field, which is very beneficial to solve the contradiction between slow light and broad bandwidth. Our results can be applied to the design of high-performance photonic devices, such as an optical buffer, optical switch, and optical filter.

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