scholarly journals Low-Profile Harmonic Transponder for IoT Applications

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2053
Author(s):  
Maher Khaliel ◽  
Aman Batra ◽  
Abdelfattah Fawky ◽  
Thomas Kaiser
Keyword(s):  
Equivalent Circuit ◽  
Harmonic Generation ◽  
State Of The Art ◽  
Second Harmonic ◽  
Single Layer ◽  
Input Power ◽  
Conversion Loss ◽  
Iot Applications ◽  
Low Profile ◽  
Harmonic Conversion

This paper proposes a novel single-layer, low-profile harmonic transponder to be integrated with the printable diodes based on Si particles. The introduced prototype consists of two bowtie dipoles that are directly matched to the harmonic generation element at a fundamental 2.45GHz frequency and also at the corresponding second harmonic 4.9GHz frequency. Therefore, the antennas and T-matching parts can be manufactured as separate inlays using a single layer-substrate. Besides the new prototype, the harmonic conversion loss (CL) is theoretically and experimentally investigated. In this regard, the equivalent circuit is driven and utilized to analyze the CL performance with variations in fundamental frequency and input power. The introduced transponder outperforms the state-of-the-art work from the printability, size, and CL point of views.

Second Harmonic Generation in Poled Polymers

1995 ◽  
Vol 413 ◽  
Author(s):  
G. I. Stegeman ◽  
M. JÄger ◽  
A. Otomo ◽  
W. Brinker ◽  
S. Yilmaz ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Organic Materials ◽  
Second Harmonic ◽  
Input Power ◽  
Inorganic Materials ◽  
Channel Waveguides ◽  
Harmonic Conversion ◽  
Conversion Efficiencies

ABSTRACTThe phenomenon of second harmonic generation has been studied from the earliest days of nonlinear optics.[l] To date the most impressive results in terms of conversion efficiency for as low an input power as possible have been obtained in channel waveguides made from inorganic materials.[2] However, when their second order nonlinearities (10s of pm/V) are compared with those of organic materials (10s → 100s pmn/V), it is clear that organic materials should eventually produce much better harmonic conversion efficiencies. [3]

High-power ultrafast thin-disk multipass amplifiers for efficient laser-based manufacturing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Marwan Abdou Ahmed ◽  
Christoph Roecker ◽  
André Loescher ◽  
Florian Bienert ◽  
Daniel Holder ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
State Of The Art ◽  
Second Harmonic ◽  
Average Power ◽  
Polycrystalline Diamond ◽  
Third Harmonic Generation ◽  
Thin Disk ◽  
Ultrafast Laser ◽  
Third Harmonic ◽  
Laser Systems

Abstract Thin-disk multipass amplifiers represent one of the most powerful approaches to scale the average and peak powers of ultrafast laser systems. The present paper presents the amplification of picosecond and femtosecond pulses to average powers exceeding 2 and 1 kW, respectively. Second-harmonic generation in lithium-triborate crystals with powers higher than 1.4 kW and 400 W at a wavelength of 515 nm with picosecond and femtosecond pulse durations, respectively, are also reported. Furthermore, third-harmonic generation was demonstrated with output powers exceeding 250 W at a wavelength of 343 nm. Finally, processing of silicon, metals, and polycrystalline diamond with fs pulses at an average power of 1 kW is presented to demonstrate removal rates that are improved by orders of magnitude as compared to state-of-the-art techniques.

Partially Hydrogenated Graphene: Semiconductor Material with a Tunable Gap and Its Non-Destructive Optical Characterization

2011 ◽  
Vol 1362 ◽  
Author(s):  
F. Gaspari ◽  
A.I. Shkrebtii ◽  
P. McNelles ◽  
J.L. Cabellos ◽  
B.S. Mendoza
Keyword(s):  
Harmonic Generation ◽  
First Principles ◽  
Second Harmonic ◽  
Single Layer ◽  
Optical Characterization ◽  
Forthcoming Paper ◽  
Optical Gap ◽  
Hydrogenated Graphene ◽  
Non Destructive ◽  
Induced Structure

ABSTRACTWe report first principles modeling of partially hydrogenated graphene, with a variety of hydrogen induced superstructures. The dependence of the optical gap on hydrogen content and coverage is examined, to assess the best configurations suitable for optoelectronic applications. Electron and optical DFT LDA gaps in the range between 0.2 and 1.5 eV were obtained for low hydrogen coverage. For such systems, hydrogen clustering (by saturating neighbouring C dangling bonds at the opposite sides of the graphene sheet) is energetically most favourable and generally produces larger gap. More homogeneous H distribution one-side bonded to C-host atoms is, in contrast, less energetically favourable or even structurally unstable and generally produces smaller gap. In addition, ordering of hydrogen was observed at 50% of H, that offers a possibility of transforming 2D graphene to an array of 1D nanowires Calculated linear optical anisotropy and nonlinear second harmonic generation (this will be discussed in a forthcoming paper) indicate these are not only gap sensitive, but can provide an access to microscopic details of the 2D nano-sheets such as symmetry, hydrogen induced structure, degree of hydrogenation, chemical bonding and many others, all promising for device application. The approach developed can be used for graphene/ graphane single layer or bilayer, formed on top of various substrates, where experimental geometries may not provide conditions for complete hydrogenation of the 2D nano-sheet(s).

scholarly journals Optical second harmonic generation in encapsulated single-layer InSe

AIP Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 105120 ◽  
Author(s):  
Nadine Leisgang ◽  
Jonas G. Roch ◽  
Guillaume Froehlicher ◽  
Matthew Hamer ◽  
Daniel Terry ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Single Layer ◽  
Optical Second Harmonic Generation

SECOND ORDER NONLINEAR OPTICAL PROPERTIES OF LANGMUIR–BLODGETT FILMS CONSISTING OF NON-AMPHIPHILIC POLAR MOLECULES

2004 ◽  
Vol 13 (03n04) ◽  
pp. 355-358 ◽  
Author(s):  
JUN KAWAMATA ◽  
SHOICHIRO HIRAKAWA ◽  
SEIJI TANI ◽  
YUICHIRO OGATA ◽  
AKIHIKO YAMAGISHI
Keyword(s):  
Optical Properties ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Single Layer ◽  
Lb Films ◽  
Langmuir Blodgett ◽  
Solid Substrates ◽  
Langmuir Blodgett Films

We have prepared hybrid Langmuir–Blodgett (LB) films consisting of a clay single layer and a non-amphiphilic polar molecule, 2,5-bis(p-dimethylaminocinnamylidene)-cyclopentanone. LB films deposited on solid substrates were characterized by means of UV-vis absorption spectroscopy and optical second-harmonic generation (SHG) measurements.

Interaction of Magnesium Ions with Pristine Single-Layer and Defected Graphene/Water Interfaces Studied by Second Harmonic Generation

2014 ◽  
Vol 118 (28) ◽  
pp. 7739-7749 ◽  
Author(s):  
Jennifer L. Achtyl ◽  
Ivan V. Vlassiouk ◽  
Sumedh P. Surwade ◽  
Pasquale F. Fulvio ◽  
Sheng Dai ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Single Layer ◽  
Magnesium Ions ◽  
Defected Graphene

Estimation of second harmonic generation efficiency of various quasi-phase matching grating structures

2017 ◽  
Vol 26 (04) ◽  
pp. 1750043
Author(s):  
Toijam Sunder Meetei ◽  
Ramanathan Chandrasekaran ◽  
Rogothaman K. Prasath ◽  
Shanmugam Boomadevi ◽  
Krishnamoorthy Pandiyan
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Second Harmonic Generation Efficiency ◽  
Periodic Grating ◽  
Phase Profile ◽  
Quasi Phase Matching ◽  
Efficiency Factors ◽  
Harmonic Conversion

We have analytically calculated the efficiency factor of the second harmonic generation (SHG) in quasi-phase matching (QPM) devices of various periodic grating structures such as square, triangular, sinusoidal, trapezoidal and blazed. The phase profile representing the nonlinear optical coefficient of these grating structures has been mathematically derived and its second harmonic efficiency factors are calculated. The second harmonic conversion efficiency factors of square, triangular, sinusoidal, trapezoidal and blazed QPM structures are calculated to be 0.405, 0.164, 0.25, 0.365 and 1.0, respectively.

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