TAILIEUCHUNG - Trapping electromagnetic waves by metamaterials

In this report, we experimentally and numerically demonstrated a simple metamaterial structure, which perfectly absorbs the microwave radiation. Samples are prepared using the photo-lithography technique and measured by the standard microwave vector network analyzer. Simulations using the finite integration technique are performed to explore the possible mechanism of the observation. It is found that the absorbed energy not only dissipates via material losses, as it was believed, but also reradiates as secondary sources. The finding results would be beneficial for microwave electromagnetic absorption/radiation based applications and stealth technologies. | Nghiên cứu khoa học công nghệ TRAPPING ELECTROMAGNETIC WAVES BY METAMATERIALS Nguyen Hoang Tung1 Ly Nguyen Le2 Do Thanh Viet2 Nguyen Manh Thang2 Doan Tung Anh2 Ngo Van Duc3 Le Minh Thuy3 Nguyen Minh Tuan4 Vu Dinh Lam1 and Nguyen Thanh Tung1 Abstract Arbitrarily controlling electromagnetic waves is one of important advances of metamaterial over natural ones. In this report we experimentally and numerically demonstrated a simple metamaterial structure which perfectly absorbs the microwave radiation. Samples are prepared using the photo-lithography technique and measured by the standard microwave vector network analyzer. Simulations using the finite integration technique are performed to explore the possible mechanism of the observation. It is found that the absorbed energy not only dissipates via material losses as it was believed but also reradiates as secondary sources. The finding results would be beneficial for microwave electromagnetic absorption radiation based applications and stealth technologies. Keywords Metamaterials absorber Electromagnetic wave. 1. INTRODUCTION Wave-matter interaction has been one of the long standing problems of the materials science owing to its interesting physics and important applications in human life 1 . For decades conventional materials have been doped sized and reformed to change their electromagnetic properties which rely on the way their atoms molecules interact with electromagnetic waves 2 . An alternative approach to create new electromagnetic properties is the use of metamaterials which can tailor the optical parameters of materials just by structural engineering rather than changing constituents 3 . Incredible applications of metamaterials can be foreseen from published reports such as perfect lens 4 invisible cloaks 5 and slow-light modulators 6 . The underlying physics of metamaterials is integrating periodically sub-wavelength resonators to influence the effective optical parameters of the embedded medium. For this .

• Cơ khí - Chế tạo máy
• Trapping electromagnetic waves by metamaterials
• Trapping electromagnetic waves
• The photo lithography technique
• Microwave electromagnetic absorption radiation
• Absorbs the microwave radiation