Mid-infrared GaAs/AlGaAs micro-ring resonators characterized via thermal tuning

Micro-ring resonators with a decoupling waveguide have been fabricated from thin-film GaAs/Al0.2Ga0.8As waveguides accommodating mid-infrared wavelengths, and were characterized in detail via thermal tuning.

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Assessment of the accuracy of scaling methods for radiance simulations at far and mid infrared wavelengths

Journal of Quantitative Spectroscopy and Radiative Transfer ◽

10.1016/j.jqsrt.2021.107739 ◽

2021 ◽

pp. 107739

Author(s):

Michele Martinazzo ◽

Davide Magurno ◽

William Cossich ◽

Carmine Serio ◽

Guido Masiello ◽

...

Keyword(s):

Mid Infrared ◽

Scaling Methods ◽

Infrared Wavelengths

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Mid-infrared thin-film diamond waveguides combined with tunable quantum cascade lasers for analyzing the secondary structure of proteins

physica status solidi (a) ◽

10.1002/pssa.201600134 ◽

2016 ◽

Vol 213 (8) ◽

pp. 2117-2123 ◽

Cited By ~ 19

Author(s):

Ángela I. López-Lorente ◽

Pei Wang ◽

Markus Sieger ◽

Ernesto Vargas Catalan ◽

Mikael Karlsson ◽

...

Keyword(s):

Thin Film ◽

Secondary Structure ◽

Quantum Cascade Lasers ◽

Mid Infrared ◽

Quantum Cascade ◽

Secondary Structure Of Proteins ◽

Cascade Lasers ◽

Structure Of Proteins

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Silicon photonic devices for mid-infrared applications

Nanophotonics ◽

10.1515/nanoph-2013-0027 ◽

2014 ◽

Vol 3 (4-5) ◽

pp. 329-341 ◽

Cited By ~ 19

Author(s):

Raji Shankar ◽

Marko Lončar

Keyword(s):

Gas Sensing ◽

Wavelength Region ◽

Photonic Devices ◽

Ring Resonators ◽

Space Communications ◽

Mid Infrared ◽

Silicon Photonic ◽

Processing Techniques ◽

Silicon Based

AbstractThe mid-infrared (IR) wavelength region (2–20 µm) is of great interest for a number of applications, including trace gas sensing, thermal imaging, and free-space communications. Recently, there has been significant progress in developing a mid-IR photonics platform in Si, which is highly transparent in the mid-IR, due to the ease of fabrication and CMOS compatibility provided by the Si platform. Here, we discuss our group’s recent contributions to the field of silicon-based mid-IR photonics, including photonic crystal cavities in a Si membrane platform and grating-coupled high-quality factor ring resonators in a silicon-on-sapphire (SOS) platform. Since experimental characterization of microphotonic devices is especially challenging at the mid-IR, we also review our mid-IR characterization techniques in some detail. Additionally, pre- and post-processing techniques for improving device performance, such as resist reflow, Piranha clean/HF dip cycling, and annealing are discussed.

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Thermal tuning and modulation of a DFB fibre laser with a thin-film heater

Applied Physics B ◽

10.1007/s00340-002-1002-9 ◽

2002 ◽

Vol 75 (4-5) ◽

pp. 497-501 ◽

Cited By ~ 1

Author(s):

S. Sogaard ◽

J. Henningsen

Keyword(s):

Thin Film ◽

Fibre Laser ◽

Thermal Tuning

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Kerr nonlinearity and multi-photon absorption in germanium at mid-infrared wavelengths

Applied Physics Letters ◽

10.1063/1.4990590 ◽

2017 ◽

Vol 111 (9) ◽

pp. 091902 ◽

Cited By ~ 9

Author(s):

B.-U. Sohn ◽

C. Monmeyran ◽

L. C. Kimerling ◽

A. M. Agarwal ◽

D. T. H. Tan

Keyword(s):

Kerr Nonlinearity ◽

Photon Absorption ◽

Mid Infrared ◽

Infrared Wavelengths

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DFT-FDTD modeling of a new broadband mid-infrared IGZO thin-film phototransistor based on black phosphorus capping layer incorporating intermediate metallic film

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2021.110528 ◽

2022 ◽

Vol 162 ◽

pp. 110528

Author(s):

S.E. Farah ◽

Z. Dibi ◽

H. Ferhati ◽

F. Djeffal

Keyword(s):

Thin Film ◽

Black Phosphorus ◽

Metallic Film ◽

Mid Infrared ◽

Capping Layer

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Tripod-Loop Metasurfaces for Terahertz-Sensing Applications: A Comparison

Applied Sciences ◽

10.3390/app10186504 ◽

2020 ◽

Vol 10 (18) ◽

pp. 6504

Author(s):

Irati Jáuregui-López ◽

Bakhtiyar Orazbayev ◽

Victor Pacheco-Peña ◽

Miguel Beruete

Keyword(s):

Thin Film ◽

Electric Field ◽

Field Intensity ◽

Electric Field Intensity ◽

Ring Resonators ◽

Film Sensor ◽

Average Value ◽

Sensing Applications ◽

Order Of Magnitude ◽

Hole Arrays

The high electric field intensity achieved on the surface of sensors based on metasurfaces (metasensors) makes them an excellent alternative for sensing applications where the volume of the sample to be identified is tiny (for instance, thin-film sensing devices). Various shapes and geometries have been proposed recently for the design of these metasensors unit-cells (meta-atoms) such as split ring resonators or hole arrays, among others. In this paper, we propose, design, and evaluate two types of tripod metasurfaces with different complexity in their geometry. An in-depth comparison of their performance is presented when using them as thin-film sensor devices. The meta-atoms of the proposed metasensors consist of a simple tripod and a hollow tripod structure. From numerical calculations, it is shown that the best geometry to perform thin-film sensing is the compact hollow tripod (due to the highest electric field on its surface) with a mean sensitivity of 3.72 × 10−5 nm−1. Different modifications are made to this structure to improve this value, such as introducing arms in the design and rotating the metallic pattern 30 degrees. The best sensitivity achieved for extremely thin film analytes (5–25 nm thick) has an average value of 1.42 × 10−4 nm, which translates into an extremely high improvement of 381% with respect to the initial hollow tripod structure. Finally, a comparison with other designs found in the literature shows that our design is at the top of the ranking, improving the overall performance by more than one order of magnitude. These results highlight the importance of using metastructures with more complex geometries so that a higher electric field intensity distribution and, therefore, designs with better performance can be obtained.

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