Highly sensitive and ultrafast light modulation with a vanadyloxophthalocyanine-doped composite polymer guided wave mode device

2006 ◽  
Vol 100 (11) ◽  
pp. 113102 ◽  
Author(s):  
Ryuji Matsumoto ◽  
Toshihiko Nagamura
Keyword(s):  
Wave Mode ◽  
Guided Wave ◽  
Light Modulation ◽  
Composite Polymer ◽  
Highly Sensitive

Carbon Nanotubes in Composite Polymer Guided Wave Mode Device for Ultrafast Molecular Photonics

2007 ◽  
Vol 471 (1) ◽  
pp. 81-87 ◽  
Author(s):  
Jang-Hyun Ryu ◽  
Toshihiko Nagamura ◽  
Masahiro Shigeta ◽  
Naotoshi Nakashima
Keyword(s):  
Carbon Nanotubes ◽  
Wave Mode ◽  
Guided Wave ◽  
Composite Polymer

Ultrafast all-optical light modulation in the near infrared region by phase sensitive polymer guided wave mode geometry containing porphyrin tapes

2009 ◽  
Vol 94 (25) ◽  
pp. 253301 ◽  
Author(s):  
Ryuji Matsumoto ◽  
Toshihiko Nagamura ◽  
Naoki Aratani ◽  
Toshiaki Ikeda ◽  
Atsuhiro Osuka
Keyword(s):  
Near Infrared ◽  
Infrared Region ◽  
Wave Mode ◽  
Guided Wave ◽  
Light Modulation ◽  
All Optical ◽  
Phase Sensitive ◽  
Near Infrared Region

scholarly journals Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning

2013 ◽  
Vol 113 (14) ◽  
pp. 144904 ◽  
Author(s):  
Pasi Karppinen ◽  
Ari Salmi ◽  
Petro Moilanen ◽  
Timo Karppinen ◽  
Zuomin Zhao ◽  
...  
Keyword(s):  
Laser Diode ◽  
Mode Selection ◽  
Wave Mode ◽  
Guided Wave ◽  
Diode Array ◽  
Laser Diode Array ◽  
Ultrasonic Guided Wave

Highly sensitive method for concentration and absorption measurements by guided-wave resonance

2000 ◽  
Author(s):  
Guang Chen ◽  
Yi Jiang ◽  
Zhuangqi Cao ◽  
Qishun Shen ◽  
Xiaoming Dou ◽  
...  
Keyword(s):  
Guided Wave ◽  
Wave Resonance ◽  
Highly Sensitive ◽  
Sensitive Method ◽  
Absorption Measurements

scholarly journals Numerical Simulation on Micro-damage Detection In CFRP Composites Based on Nonlinear Ultrasonic Guided Waves

2021 ◽  
Keyword(s):  
Damage Detection ◽  
Composite Structures ◽  
Guided Waves ◽  
Second Harmonic ◽  
Wave Mode ◽  
Guided Wave ◽  
Reinforced Plastics ◽  
Matrix Cracks ◽  
Nonlinear Ultrasonic ◽  
Contact Acoustic Nonlinearity

Abstract. Micro-damages such as pores, closed delamination/debonding and fiber/matrix cracks in carbon fiber reinforced plastics (CFRP) are vital factors towards the performance of composite structures, which could collapse if defects are not detected in advance. Nonlinear ultrasonic technologies, especially ones involving guided waves, have drawn increasing attention for their better sensitivity to early damages than linear acoustic ones. The combination of nonlinear acoustics and guided waves technique can promisingly provide considerable accuracy and efficiency for damage assessment and materials characterization. Herein, numerical simulations in terms of finite element method are conducted to investigate the feasibility of micro-damage detection in multi-layered CFRP plates using the second harmonic generation (SHG) of asymmetric Lamb guided wave mode. Contact acoustic nonlinearity (CAN) is introduced into the constitutive model of micro-damages in composites, which leads to the distinct SHG compared with material nonlinearity. The results suggest that the generated second order harmonics due to CAN could be received and adopted for early damage evaluation without matching the phase of the primary waves.

Detection of Defects in Titanium Using Shear Horizontal Guided Waves

2021 ◽  
Author(s):  
Christian Peyton ◽  
Rachel S. Edwards ◽  
Steve Dixon ◽  
Ben Dutton ◽  
Wilson Vesga
Keyword(s):  
Guided Waves ◽  
Wave Mode ◽  
Guided Wave ◽  
Inspection System ◽  
Wave Direction ◽  
Finite Element Software ◽  
Small Defect ◽  
Back Face ◽  
The Relationship ◽  
Shear Horizontal

Abstract This paper investigates the interaction behaviour between the fundamental shear horizontal guided wave mode and small defects, in order to understand and develop an improved inspection system for titanium samples. In this work, an extensive range of defect sizes have been simulated using finite element software. The SH0 reflection from a defect has been shown previously to depend on its length as the total reflection consists of reflections from both the front and back face. However, for small defect widths, this work has found that the width also affects this interference, changing the length at which the reflection is largest. In addition, the paper looks at how the size of the defect affects the mode converted S0 reflection and SH0 diffraction. The relationship between the SH0 diffraction and defect size is shown to be more complex compared to the reflections. The mode converted S0 reflection occurs at an angle to the incident wave direction; therefore, the most suitable angle for the detection has been found. Simultaneous measurement of multiple waves would bring benefits to inspection.

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