Linear and nonlinear properties of chalcogenide glasses in the terahertz frequency

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2014Researchpeer-review

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Terahertz (THz) waves have the potential to improve a wide range of devices in the space, defense and semiconductor industries as well as offering the possibility of investigating various molecules of interest in biology, medicine, art etc. For this reason, THz sources, detectors and passive linear components have greatly been developed in recent years. However there is still no any non-linear device available. This is mainly due to the lack of the rigorous investigation of non-linear characteristics of materials in the THz range. We chose to investigate chalcogenide glasses due to their high nonlinear coefficients in the optical range, which might suggest pronounced nonlinear behavior also at THz frequencies. Here we present measurements, both linear and nonlinear, of As2S3 and As2Se3. For the linear measurements we employed a combination of THz time-domain spectroscopy setups. In the low frequency range we used a standard THz-TDS setup based on photoconductive switches while in the higher frequency domain we used an air biased coherent detection (ABCD) setup. This allowed for a wide frequency range (from 0.2 to 18 THz) investigation of the refractive index of the glasses. The nonlinear coefficient in the THz range was investigated using a lithium niobate based setup that allows us to reach electrical field strength exceeding 400 kV/cm. Results from both investigations will be presented during the talk.
Original languageEnglish
Title of host publicationProceedings of the 16th International Conference on Transparent Optical Networks
Publication date2014
Article number6876467
ISBN (Print)9781479956012
Publication statusPublished - 2014
Event16th International Conference on Transparent Optical Networks - Graz, Austria
Duration: 6 Jul 201410 Jul 2014
Conference number: 16


Conference16th International Conference on Transparent Optical Networks
Internet address
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Arsenic compounds, Chalcogenide glasses, Photoconducting switches, Terahertz wave spectra, Communication, Networking and Broadcast Technologies, Components, Circuits, Devices and Systems, Engineered Materials, Dielectrics and Plasmas, Photonics and Electrooptics, frequency 2.0E+11 1.8E+13 Hz, Air biased coherent detection setup, As(role bin), As2(role bin), As2S3(role bin), As2Se3(role bin), As<sub>2</sub>S<sub>3</sub>, As<sub>2</sub>Se<sub>3</sub>, Electrical field strength, Frequency 0.2 THz to 18 THz, Frequency-domain analysis, Glass, Li(role ss), LiNbO3(role ss), LiNbO<sub>3</sub>, Linear properties, Lithium niobate, Nb(role ss), NbO3(role ss), Nonlinear coefficient, Nonlinear properties, O(role ss), O3(role ss), Photoconductive switches, Photonics, Refractive index, Resonant frequency, S(role bin), S3(role bin), Se(role bin), Se3(role bin), Spectroscopy, Terahertz frequency, THz spectroscopy, THz time-domain spectroscopy

ID: 101894940