scholarly journals Hybrid graphene/silicon integrated optical isolators with photonic spin–orbit interaction

2016 ◽  
Vol 108 (15) ◽  
pp. 151103 ◽  
Author(s):  
Jingwen Ma ◽  
Xiang Xi ◽  
Zejie Yu ◽  
Xiankai Sun
Keyword(s):  
Orbit Interaction ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Integrated Optical ◽  
Optical Isolators

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.

Spin generation and manipulation based on spin-orbit interaction in semiconductors

2017 ◽  
Author(s):  
J. Nitta
Keyword(s):  
Magnetic Field ◽  
Orbit Interaction ◽  
Degree Of Freedom ◽  
Effective Magnetic Field ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Spin Degree ◽  
Dimensional Electron Gas ◽  
Spin Orbit Interactions ◽  
Electrical Generation

This chapter focuses on the electron spin degree of freedom in semiconductor spintronics. In particular, the electrostatic control of the spin degree of freedom is an advantageous technology over metal-based spintronics. Spin–orbit interaction (SOI), which gives rise to an effective magnetic field. The essence of SOI is that the moving electrons in an electric field feel an effective magnetic field even without any external magnetic field. Rashba spin–orbit interaction is important since the strength is controlled by the gate voltage on top of the semiconductor’s two-dimensional electron gas. By utilizing the effective magnetic field induced by the SOI, spin generation and manipulation are possible by electrostatic ways. The origin of spin-orbit interactions in semiconductors and the electrical generation and manipulation of spins by electrical means are discussed. Long spin coherence is achieved by special spin helix state where both strengths of Rashba and Dresselhaus SOI are equal.

scholarly journals Dirac nodal lines protected against spin-orbit interaction in IrO2

2019 ◽  
Vol 3 (6) ◽  
Author(s):  
J. N. Nelson ◽  
J. P. Ruf ◽  
Y. Lee ◽  
C. Zeledon ◽  
J. K. Kawasaki ◽  
...  
Keyword(s):  
Orbit Interaction ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Nodal Lines

scholarly journals Low-symmetry nanowire cross-sections for enhanced Dresselhaus spin-orbit interaction

2021 ◽  
Vol 103 (19) ◽  
Author(s):  
Miguel J. Carballido ◽  
Christoph Kloeffel ◽  
Dominik M. Zumbühl ◽  
Daniel Loss
Keyword(s):  
Cross Sections ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Low Symmetry

scholarly journals Strong and tunable spin–orbit interaction in a single crystalline InSb nanosheet

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuanjie Chen ◽  
Shaoyun Huang ◽  
Dong Pan ◽  
Jianhong Xue ◽  
Li Zhang ◽  
...  
Keyword(s):  
Layer Structure ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Device Layer ◽  
Physical Origin ◽  
Quantum Devices ◽  
Spin Orbit Interaction ◽  
Topological Quantum ◽  
Narrow Bandgap ◽  
Dual Gate

AbstractA dual-gate InSb nanosheet field-effect device is realized and is used to investigate the physical origin and the controllability of the spin–orbit interaction in a narrow bandgap semiconductor InSb nanosheet. We demonstrate that by applying a voltage over the dual gate, efficiently tuning of the spin–orbit interaction in the InSb nanosheet can be achieved. We also find the presence of an intrinsic spin–orbit interaction in the InSb nanosheet at zero dual-gate voltage and identify its physical origin as a build-in asymmetry in the device layer structure. Having a strong and controllable spin–orbit interaction in an InSb nanosheet could simplify the design and realization of spintronic deceives, spin-based quantum devices, and topological quantum devices.

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