Electrodes that break transmission records! The innovative idea of Prof. Tomasz Czyszanowski of the Technical University of Lodz was carried out with the cooperation of scientists from the best scientific and research centers in the country involved in photonics research.
The study assumed the fabrication of electrodes in the form of monolithic contrast garating (MHCG) subwavelength gratings made of GaAs with embedded metallic strips between the semiconductor strips.
What came out of this remarkable project? The electrodes showed a record absolute transmission of 75% for unpolarized light, resulting in a record relative transmission of 108%. The proposed electrode design achieves an even higher absolute transmittance for polarized light, reaching 92% which corresponds to 133% absolute transmission.
Despite the record high transmittance, the surface resistance of the proposed electrode design is the best ever recorded, several times lower than those published for other transparent conductive electrode designs, and ranges from 0.5 to 1 Ω Sq-1. The paper presents results on the fabrication of transparent electrodes for infrared radiation. Such electrodes can be applicable in modern optoelectronic devices, especially in the area of infrared radiation used by medicine, industry, or the military, or in the production of advanced optical devices such as filters, light modulators, or optical components used in telecommunications or display technology.
How was it achieved? The team from Lukasiewicz – IMIF was responsible for fabricating the MHCG metal structures, the Institute of Physics of the Technical University of Lodz designed the electrode structure and also carried out electrical characterization, the Faculty of Fundamental Technological Problems of the Wroclaw University of Technology carried out optical measurements, and the Military University of Technology visualized the performance of the electrodes using thermal imaging studies.
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