scholarly journals Actively Tunable Terahertz Switches Based on Subwavelength Graphene Waveguide

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 665 ◽  
Author(s):  
Zhongyi Guo ◽  
Xiaoru Nie ◽  
Fei Shen ◽  
Hongping Zhou ◽  
Qingfeng Zhou ◽  
...  
Keyword(s):  
Communication Technology ◽  
Optical Communication ◽  
Methacrylic Acid ◽  
Optical Switching ◽  
Optical Switches ◽  
Graphene Monolayer ◽  
Single Input ◽  
Graphene Devices ◽  
On Chip ◽  
Transmission Direction

As a new field of optical communication technology, on-chip graphene devices are of great interest due to their active tunability and subwavelength scale. In this paper, we systematically investigate optical switches at frequency of 30 THz, including Y-branch (1 × 2), X-branch (2 × 2), single-input three-output (1 × 3), two-input three-output (2 × 3), and two-input four-output (2 × 4) switches. In these devices, a graphene monolayer is stacked on the top of a PMMA (poly methyl methacrylate methacrylic acid) dielectric layer. The optical response of graphene can be electrically manipulated; therefore, the state of each channel can be switched ON and OFF. Numerical simulations demonstrate that the transmission direction can be well manipulated in these devices. In addition, the proposed devices possess advantages of appropriate ON/OFF ratios, indicating the good performance of graphene in terahertz switching. These devices provide a new route toward terahertz optical switching.

scholarly journals Editorial on Special Issue “Modern Applications in Optics and Photonics: From Sensing and Analytics to Communication”

2021 ◽  
Vol 11 (4) ◽  
pp. 1589
Author(s):  
Lourdes S. M. Alwis ◽  
Kort Bremer ◽  
Bernhard Roth
Keyword(s):  
Communication Technology ◽  
21St Century ◽  
Optical Communication ◽  
Biomedical Imaging ◽  
Special Issue ◽  
Key Technologies ◽  
Novel Applications

Optics and photonics are among the key technologies of the 21st century and offer the potential for novel applications in areas as diverse as sensing and spectroscopy, analytics, monitoring, biomedical imaging and diagnostics, as well as optical communication technology, among others [...]

scholarly journals Low-energy optical switching of SO2 linkage isomerisation in single crystals of a ruthenium-based coordination complex

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13183-13192
Author(s):  
Jacqueline M. Cole ◽  
David J. Gosztola ◽  
Sven O. Sylvester
Keyword(s):  
Single Crystals ◽  
Optical Sensors ◽  
Optical Switching ◽  
Optical Switches ◽  
Low Energy ◽  
Coordination Complex ◽  
Wide Range

Single crystals that behave as optical switches are desirable for a wide range of applications, from optical sensors to read–write memory media.

On-chip discrimination of orbital angular momentum of light with plasmonic nanoslits

Nanoscale ◽  
2016 ◽  
Vol 8 (4) ◽  
pp. 2227-2233 ◽  
Author(s):  
Shengtao Mei ◽  
Kun Huang ◽  
Hong Liu ◽  
Fei Qin ◽  
Muhammad Q. Mehmood ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Communication System ◽  
Degree Of Freedom ◽  
System Capacity ◽  
Optical Communication System ◽  
On Chip

The orbital angular momentum (OAM) of light can be taken as an independent and orthogonal degree of freedom for multiplexing in an optical communication system, potentially improving the system capacity to hundreds of Tbits per second.

Optical MEMS platform for low-cost on-chip integration of planar light circuits and optical switching

2004 ◽  
Author(s):  
Kristine A. German ◽  
Joel Kubby ◽  
Jingkuang Chen ◽  
James Diehl ◽  
Kathleen Feinberg ◽  
...  
Keyword(s):  
Optical Switching ◽  
Low Cost ◽  
Optical Mems ◽  
On Chip

Anapole enhanced on-chip routing of spin-valley photons in 2D materials for silicon integrated optical communication

2021 ◽  
Author(s):  
Qi Yao ◽  
Ya-Qing Bie ◽  
Jianfa Chen ◽  
Jinyang Li ◽  
Feng Li ◽  
...  
Keyword(s):  
Optical Communication ◽  
2D Materials ◽  
Integrated Optical ◽  
On Chip

Thermo-optical switches using coated microsphere resonators

2001 ◽  
Vol 694 ◽  
Author(s):  
C. Tapalian ◽  
J.-P. Laine ◽  
P. A. Lane
Keyword(s):  
Resonant Frequency ◽  
Frequency Shift ◽  
Conjugated Polymer ◽  
Optical Switching ◽  
Optical Switches ◽  
Whispering Gallery Modes ◽  
Pump Light ◽  
Silica Microsphere ◽  
Frequency Shifts ◽  
Whispering Gallery

AbstractWe report optical switching by a silica microsphere optical resonator coated by a conjugated polymer. Microspheres were fabricated by melting the tip of an optical fiber and coated by dipping in a 1 mg/ml toluene solution of poly(2,5-dioctyloxy-1,4-phenylenevinylene) (DOO-PPV). The resonator properties were characterized by evanescently coupling 1.55 µm light propagating along a stripline-pedestal anti-resonant reflecting optical waveguide into optical whispering gallery modes (WGMs). WGM linewidths less than 2 MHz were measured, corresponding to cavity Q > 108. WGM resonant frequency shifts as large as 3.2 GHz were observed when 405 nm pump light with a power density of ~100 mW/cm2 was incident on the microsphere. The time constant of the observed frequency shifts is approximately 0.165 seconds, leading us to attribute the frequency shift to thermo-optic effects. Such a system should be capable of thermo-optically switching at speeds on the order of 10 kHz.

scholarly journals Six-port optical switch for cluster-mesh photonic network-on-chip

Nanophotonics ◽  
2018 ◽  
Vol 7 (5) ◽  
pp. 827-835 ◽  
Author(s):  
Hao Jia ◽  
Ting Zhou ◽  
Yunchou Zhao ◽  
Yuhao Xia ◽  
Jincheng Dai ◽  
...  
Keyword(s):  
High Performance ◽  
Optical Switching ◽  
Optical Switch ◽  
Optical Signal ◽  
Network On Chip ◽  
Transmission Experiment ◽  
Photonic Network ◽  
Benes Network ◽  
On Chip ◽  
Spectral Responses

AbstractPhotonic network-on-chip for high-performance multi-core processors has attracted substantial interest in recent years as it offers a systematic method to meet the demand of large bandwidth, low latency and low power dissipation. In this paper we demonstrate a non-blocking six-port optical switch for cluster-mesh photonic network-on-chip. The architecture is constructed by substituting three optical switching units of typical Spanke-Benes network to optical waveguide crossings. Compared with Spanke-Benes network, the number of optical switching units is reduced by 20%, while the connectivity of routing path is maintained. By this way the footprint and power consumption can be reduced at the expense of sacrificing the network latency performance in some cases. The device is realized by 12 thermally tuned silicon Mach-Zehnder optical switching units. Its theoretical spectral responses are evaluated by establishing a numerical model. The experimental spectral responses are also characterized, which indicates that the optical signal-to-noise ratios of the optical switch are larger than 13.5 dB in the wavelength range from 1525 nm to 1565 nm. Data transmission experiment with the data rate of 32 Gbps is implemented for each optical link.

Progress of Free-Space Optical Communication Technology Based on Modulating Retro-Reflector

2013 ◽  
Vol 50 (4) ◽  
pp. 040004 ◽  
Author(s):  
孙华燕 Sun Huayan ◽  
张来线 Zhang Laixian ◽  
赵延仲 Zhao Yanzhong ◽  
郑勇辉 Zheng Yonghui
Keyword(s):  
Communication Technology ◽  
Optical Communication ◽  
Free Space ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication

scholarly journals Controllable Polarization of Lasing Emission From a Polymer Microfiber Laser

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Van Duong Ta ◽  
Rui Chen ◽  
Handong Sun
Keyword(s):  
Optical Sensors ◽  
Transverse Magnetic ◽  
Optical Switches ◽  
Pulse Excitation ◽  
Whispering Gallery ◽  
Low Threshold ◽  
Output Laser ◽  
On Chip ◽  
Doped Polymer ◽  
Lasing Modes

AbstractMicrolasers with controllable polarization of output emission are vital for on-chip optical communications, optical sensors and optical switches. In this work, we report a high quality (Q) factor, low-threshold polymer microfiber laser and the possibility of achieving laser emission with a desired polarization. The microfiber is fabricated by direct drawing from a dye-doped polymer solution and it can generate whispering gallery mode (WGM) lasing under optical pulse excitation. When the microfiber is pumped from the side with pumping direction perpendicular to the microfiber’s axis, the polarization direction of the output laser is found to be the same as that of the pump laser. Lasing emission with either transverse electric (TE) or transverse magnetic (TM) modes can be obtained and these two polarization states can be switched over by tuning the pumping laser. Furthermore, emission with both TE and TM modes can also be observed by changing the orientation of the microfiber relatively to pumping direction. Our finding provides an effective approach for achieving microlasers that have high Q lasing modes with anticipated polarization.

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