scholarly journals Dynamic piezoelectric MEMS-based optical metasurfaces

2021 ◽  
Vol 7 (26) ◽  
pp. eabg5639
Author(s):  
Chao Meng ◽  
Paul C. V. Thrane ◽  
Fei Ding ◽  
Jo Gjessing ◽  
Martin Thomaschewski ◽  
...  
Keyword(s):  
Optical Networks ◽  
Beam Steering ◽  
Complex Dynamic ◽  
Microelectromechanical System ◽  
Optical Responses ◽  
Operating Wavelength ◽  
High Modulation ◽  
Reflected Light ◽  
Polarization Independent ◽  
Fast Responses

Optical metasurfaces (OMSs) have shown unprecedented capabilities for versatile wavefront manipulations at the subwavelength scale. However, most well-established OMSs are static, featuring well-defined optical responses determined by OMS configurations set during their fabrication, whereas dynamic OMS configurations investigated so far often exhibit specific limitations and reduced reconfigurability. Here, by combining a thin-film piezoelectric microelectromechanical system (MEMS) with a gap-surface plasmon–based OMS, we develop an electrically driven dynamic MEMS-OMS platform that offers controllable phase and amplitude modulation of the reflected light by finely actuating the MEMS mirror. Using this platform, we demonstrate MEMS-OMS components for polarization-independent beam steering and two-dimensional (2D) focusing with high modulation efficiencies (~50%), broadband operation (~20% near the operating wavelength of 800 nanometers), and fast responses (<0.4 milliseconds). The developed MEMS-OMS platform offers flexible solutions for realizing complex dynamic 2D wavefront manipulations that could be used in reconfigurable and adaptive optical networks and systems.

A New Proposal for Ultra-Compact Polarization Independent Power Splitter Based on Photonic Crystal Structures

2018 ◽  
Vol 39 (4) ◽  
pp. 375-379 ◽  
Author(s):  
Hadi Razmi ◽  
Mohammad Soroosh ◽  
Yousef S. Kavian
Keyword(s):  
Photonic Crystal ◽  
Crystal Structures ◽  
Optical Networks ◽  
Photonic Band Gap ◽  
Transmission Efficiency ◽  
Optical Polarization ◽  
Power Splitter ◽  
All Optical ◽  
Photonic Band ◽  
Polarization Independent

Abstract Polarization dependency imposes great limitations for application of optical device in optical networks and systems. In this paper, we are going to design and propose a 1*2 all optical polarization independent power splitter based on photonic crystal structures. For designing such a device we should employ a fundamental photonic crystal structure which has joint photonic band gap. The obtained results show that at 1,560 nm wavelength the final structure has transmission efficiency equal to 45 % for outputs in both TE and TM modes.

Design and Simulation of a Polarization-Independent Active Metamaterial Terahertz Modulator

2013 ◽  
Vol 455 ◽  
pp. 167-172 ◽  
Author(s):  
Li Shuang Feng ◽  
Bo Hao Yin ◽  
Zhen Zhou ◽  
Jia Wei Sui ◽  
Chen Long Li
Keyword(s):  
Theoretical Model ◽  
Resonance Frequency ◽  
Amplitude Modulation ◽  
Modulation Depth ◽  
Maximum Amplitude ◽  
High Modulation ◽  
Terahertz Communication ◽  
Modulation Rate ◽  
Polarization Independent ◽  
Modulation Speed

The design and simulation of a polarization-independent active metamaterial terahertz modulator is presented in this work. The device incorporates an array of gold triple SRRs on an n-doped gallium arsenide layer to create an active metamaterial terahertz modulator with a high modulation depth, a high modulation speed and an especial polarization-independent performance for use in terahertz communication, imaging and sense.We established the theoretical model and simulatedthe key performances of the device with Ansoft HFSS.The results showed that the device exhibits a polarization-insensitivebehavior with a maximum amplitude modulation depth of 71% and a modulation rate of3.2Mbps at the resonance frequency of0.86 THz.

scholarly journals High-Fidelity Two-Qubit Gates Using a Microelectromechanical-System-Based Beam Steering System for Individual Qubit Addressing

2020 ◽  
Vol 125 (15) ◽  
Author(s):  
Ye Wang ◽  
Stephen Crain ◽  
Chao Fang ◽  
Bichen Zhang ◽  
Shilin Huang ◽  
...  
Keyword(s):  
Beam Steering ◽  
Steering System ◽  
High Fidelity ◽  
Microelectromechanical System

scholarly journals Full-range birefringence control with piezoelectric MEMS-based metasurfaces

2021 ◽  
Author(s):  
Chao Meng ◽  
Paul Thrane ◽  
Fei Ding ◽  
Sergey Bozhevolnyi
Keyword(s):  
Optical Networks ◽  
Incident Light ◽  
Full Range ◽  
Micro Electro Mechanical System ◽  
Light Polarization ◽  
Electrical Control ◽  
Polarization Control ◽  
Operating Wavelength ◽  
Conversion Efficiencies ◽  
Dynamic Wave

Abstract Dynamic polarization control is crucial for emerging highly integrated photonic systems with diverse metasurfaces being explored for its realization1–6, but efficient, fast, and broadband operation remains a cumbersome challenge. While efficient optical metasurfaces (OMSs) involving liquid crystals suffer from inherently slow responses1, other OMS realizations are limited either in the operating wavelength range (due to resonances involved)2,3 or in the range of birefringence tuning4–6. Capitalizing on our development of piezoelectric micro-electro-mechanical system (MEMS) based dynamic OMSs7, we demonstrate reflective MEMS-OMS dynamic wave plates (DWPs) with high polarization conversion efficiencies (~ 75%), broadband operation (~ 100 nm near the operating wavelength of 800 nm), fast responses (< 0.4 milliseconds) and full-range birefringence control that enables completely encircling the Poincaré sphere along trajectories determined by the incident light polarization and DWP orientation. Demonstrated complete electrical control over light polarization opens new avenues in further integration and miniaturization of optical networks and systems8,9.

scholarly journals Cross-Polarized Reflected Light Measurement of Fast Optical Responses Associated with Neural Activation

2005 ◽  
Vol 88 (6) ◽  
pp. 4170-4177 ◽  
Author(s):  
Xin-Cheng Yao ◽  
Amanda Foust ◽  
David M. Rector ◽  
Benjamin Barrowes ◽  
John S. George
Keyword(s):  
Neural Activation ◽  
Optical Responses ◽  
Reflected Light ◽  
Light Measurement
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