scholarly journals On-chip terahertz isolator with ultrahigh isolation ratios

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shixing Yuan ◽  
Liao Chen ◽  
Ziwei Wang ◽  
Wentao Deng ◽  
Zhibo Hou ◽  
...  
Keyword(s):  
Optical Property ◽  
Insertion Loss ◽  
Building Blocks ◽  
Optical Effect ◽  
Practical Applications ◽  
Tuning Method ◽  
Magneto Optical Property ◽  
Magneto Optical Effect ◽  
Terahertz Sensing ◽  
On Chip

AbstractTerahertz isolators, one of the typical nonreciprocal devices that can break Lorentz reciprocity, are indispensable building blocks in terahertz systems for their critical functionality of manipulating the terahertz flow. Here, we report an integrated terahertz isolator based on the magneto-optical effect of a nonreciprocal resonator. By optimizing the magneto-optical property and the loss of the resonator, we experimentally observe unidirectional propagation with an ultrahigh isolation ratio reaching up to 52 dB and an insertion loss around 7.5 dB at ~0.47 THz. With a thermal tuning method and periodic resonances, the isolator can operate at different central frequencies in the range of 0.405–0.495 THz. This on-chip terahertz isolator will not only inspire more solutions for integrated terahertz nonreciprocal devices, but also have the feasibility for practical applications such as terahertz sensing and reducing unnecessary reflections in terahertz systems.

scholarly journals Coin Paradox Spin–Orbit Interaction Enhances Magneto-Optical Effect and Its Application in On-Chip Integrated Optical Isolator

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Hao Hu ◽  
Jiwei Qi ◽  
Qiang Wu ◽  
Xianhui Fu ◽  
Hongjin Wu ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Optical Effect ◽  
Spin Orbit Interaction ◽  
Optical Isolator ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Magneto Optical Effect ◽  
On Chip

AbstractWe designed a simple on-chip integrated optical isolator made up of a metal–insulator–metal waveguide and a disc cavity filled with magneto-optical material to enhance the transverse magneto-optical effect through the coin paradox spin–orbit interaction (SOI). The simulation results of the non-reciprocal transmission properties of this optical structure show that a high-performance on-chip integrated optical isolator is obtained. The maximum isolation ratio is greater than 60 dB with a corresponding insertion loss of about 2 dB. The great performance of the optical isolator is attributed to the strong transverse magneto-optical effect, which is enhanced by the coin paradox SOI. Moreover, the enhancement of the transverse magneto-optical effect through the coin paradox SOI is more substantial for smaller azimuthal mode number n. Benefiting from this, the transverse magneto-optical effect remains strong in a wide wavelength range. Additionally, a smaller cavity has a stronger transverse magneto-optical effect in the same wavelength range. Our research provides a new perspective for creating highly integrated magneto-optical devices.

scholarly journals Coin paradox spin-orbit interaction enhances magneto-optical effect and its application in on-chip integrated optical isolator

2021 ◽  
Author(s):  
Hao Hu ◽  
Jiwei Qi ◽  
Qiang Wu ◽  
Xianhui Fu ◽  
Hongjin Wu ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Optical Effect ◽  
Azimuthal Mode ◽  
Spin Orbit Interaction ◽  
Optical Isolator ◽  
Integrated Optical ◽  
Magneto Optical Effect ◽  
On Chip

Abstract We designed a simple on-chip integrated optical isolator made up of a MIM waveguide and a disc cavity filled with magneto-optical material to enhance the transverse magneto-optical effect through the coin paradox spin-orbit interaction (SOI). The simulation results of the non-reciprocal transmission properties of this optical structure show that a high-performance on-chip integrated optical isolator is obtained. The maximum isolation ratio (IR) is greater than 40 dB with a corresponding insertion loss (IL) of about 2 dB. The great performance of the optical isolator is attributed to the strong transverse magneto-optical effect, which is enhanced by the coin paradox SOI. Moreover, the enhancement of the transverse magneto-optical effect through the coin paradox SOI is more substantial for smaller azimuthal mode number n. Benefitting from this, the transverse magneto-optical effect remains strong in a wide wavelength range. Additionally, a smaller cavity has a stronger transverse magneto-optical effect in the same wavelength range. Our research provides a new perspective for creating highly integrated magneto-optical devices.

All-Fiber Magneto-Optical Effect Using Nanoparticles Doped Sol-Gel Thin Film Deposited Within Microstructured Fibers

2021 ◽  
pp. 1-1
Author(s):  
Alexis Dufour ◽  
Laure Bsawmaii ◽  
Damien Jamon ◽  
Emmanuel Marin ◽  
Sophie Neveu ◽  
...  
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Optical Effect ◽  
Microstructured Fibers ◽  
Magneto Optical Effect

A Novel Magneto-Optical Effect

Nature ◽  
1921 ◽  
Vol 107 (2695) ◽  
pp. 520-522 ◽  
Author(s):  
ELIHU THOMSON
Keyword(s):  
Optical Effect ◽  
Magneto Optical Effect

So What is this Social Unconscious Anyway?

2007 ◽  
Vol 40 (3) ◽  
pp. 307-322 ◽  
Author(s):  
Haim Weinberg
Keyword(s):  
Building Blocks ◽  
Practical Applications ◽  
Working Definition ◽  
The Social ◽  
Social Unconscious ◽  
Complex Term

Although the concept of the Social Unconscious has increased in importance in the group analytic literature recently, there are still many misconceptions and misunderstandings about it and its practical applications. While some papers define the term, there are no papers explaining the basics of the social unconscious and what it includes. The purpose of this article is to address the misconceptions, describe the basic building blocks of the social unconscious, and develop a working definition for this complex term.

Chiral Phonons and Giant Magneto‐Optical Effect in CrBr 3 2D Magnet

2021 ◽  
pp. 2101618
Author(s):  
Tingting Yin ◽  
Kanchan Ajit Ulman ◽  
Sheng Liu ◽  
Andrés Granados del Águila ◽  
Yuqing Huang ◽  
...  
Keyword(s):  
Optical Effect ◽  
Magneto Optical Effect

scholarly journals Interband Cascade Photonic Integrated Circuits on Native III-V Chip

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 599
Author(s):  
Jerry R. Meyer ◽  
Chul Soo Kim ◽  
Mijin Kim ◽  
Chadwick L. Canedy ◽  
Charles D. Merritt ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Detection System ◽  
Laser Cavity ◽  
Building Blocks ◽  
Drive Power ◽  
Optical Elements ◽  
Photonic Integrated Circuit ◽  
Cleaved Facets ◽  
On Chip

We describe how a midwave infrared photonic integrated circuit (PIC) that combines lasers, detectors, passive waveguides, and other optical elements may be constructed on the native GaSb substrate of an interband cascade laser (ICL) structure. The active and passive building blocks may be used, for example, to fabricate an on-chip chemical detection system with a passive sensing waveguide that evanescently couples to an ambient sample gas. A variety of highly compact architectures are described, some of which incorporate both the sensing waveguide and detector into a laser cavity defined by two high-reflectivity cleaved facets. We also describe an edge-emitting laser configuration that optimizes stability by minimizing parasitic feedback from external optical elements, and which can potentially operate with lower drive power than any mid-IR laser now available. While ICL-based PICs processed on GaSb serve to illustrate the various configurations, many of the proposed concepts apply equally to quantum-cascade-laser (QCL)-based PICs processed on InP, and PICs that integrate III-V lasers and detectors on silicon. With mature processing, it should become possible to mass-produce hundreds of individual PICs on the same chip which, when singulated, will realize chemical sensing by an extremely compact and inexpensive package.

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