[{"department":[{"_id":"DEP5020"},{"_id":"DEP6020"}],"user_id":"83781","year":"2026","status":"public","keyword":["Manufacturing processes","Surface waves","Three-dimensional printing","Surface finishing","Surface treatment","Lenses"],"page":"2","conference":{"name":"50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","end_date":"2025-08-22","start_date":"2025-08-17","location":" Helsinki, Finland "},"abstract":[{"lang":"eng","text":"This work discusses the additive manufacturing of an axicon lens using cyclic olefin copolymer (TOPAS), and its characterization between 100 GHz and 300 GHz. The proposed manufacturing process followed by dip-coating post-processing provides an improved surface finish. Additionally, the terahertz output of the lens remains intact over the entire frequency range."}],"type":"conference_editor_article","publisher":"IEEE","doi":"10.1109/irmmw-thz61557.2025.11319870","date_updated":"2026-02-10T12:42:43Z","publication":"2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","_id":"13338","author":[{"full_name":"Shrotri, Abhijeet Narendra","id":"74090","last_name":"Shrotri","first_name":"Abhijeet Narendra","orcid":"0000-0003-2116-156X"},{"first_name":"Suraj","full_name":"Joshi, Suraj","last_name":"Joshi"},{"last_name":"Vogel","id":"77129","full_name":"Vogel, Lea","first_name":"Lea"},{"first_name":"Annamarija","last_name":"Starsaja","full_name":"Starsaja, Annamarija"},{"orcid":"0000-0001-7293-6893","first_name":"Oliver","full_name":"Stübbe, Oliver","last_name":"Stübbe","id":"51864"},{"first_name":"Sascha","full_name":"Preu, Sascha","last_name":"Preu"}],"publication_status":"published","language":[{"iso":"eng"}],"date_created":"2026-01-16T14:48:22Z","citation":{"chicago-de":"Shrotri, Abhijeet Narendra, Suraj Joshi, Lea Vogel, Annamarija Starsaja, Oliver Stübbe und Sascha Preu. 2026. <i>Terahertz Axicon Lenses</i>. <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Piscataway, NJ: IEEE. doi:<a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">10.1109/irmmw-thz61557.2025.11319870</a>, .","ufg":"<b>Shrotri, Abhijeet Narendra u. a.</b>: Terahertz Axicon Lenses, Piscataway, NJ 2026.","apa":"Shrotri, A. N., Joshi, S., Vogel, L., Starsaja, A., Stübbe, O., &#38; Preu, S. (2026). Terahertz Axicon Lenses. In <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i> (p. 2). IEEE. <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">https://doi.org/10.1109/irmmw-thz61557.2025.11319870</a>","mla":"Shrotri, Abhijeet Narendra, et al. “Terahertz Axicon Lenses.” <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>, IEEE, 2026, p. 2, <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">https://doi.org/10.1109/irmmw-thz61557.2025.11319870</a>.","short":"A.N. Shrotri, S. Joshi, L. Vogel, A. Starsaja, O. Stübbe, S. Preu, Terahertz Axicon Lenses, IEEE, Piscataway, NJ, 2026.","havard":"A.N. Shrotri, S. Joshi, L. Vogel, A. Starsaja, O. Stübbe, S. Preu, Terahertz Axicon Lenses, IEEE, Piscataway, NJ, 2026.","chicago":"Shrotri, Abhijeet Narendra, Suraj Joshi, Lea Vogel, Annamarija Starsaja, Oliver Stübbe, and Sascha Preu. <i>Terahertz Axicon Lenses</i>. <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Piscataway, NJ: IEEE, 2026. <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">https://doi.org/10.1109/irmmw-thz61557.2025.11319870</a>.","din1505-2-1":"<span style=\"font-variant:small-caps;\">Shrotri, Abhijeet Narendra</span> ; <span style=\"font-variant:small-caps;\">Joshi, Suraj</span> ; <span style=\"font-variant:small-caps;\">Vogel, Lea</span> ; <span style=\"font-variant:small-caps;\">Starsaja, Annamarija</span> ; <span style=\"font-variant:small-caps;\">Stübbe, Oliver</span> ; <span style=\"font-variant:small-caps;\">Preu, Sascha</span>: <i>Terahertz Axicon Lenses</i>. Piscataway, NJ : IEEE, 2026","bjps":"<b>Shrotri AN <i>et al.</i></b> (2026) <i>Terahertz Axicon Lenses</i>. Piscataway, NJ: IEEE.","van":"Shrotri AN, Joshi S, Vogel L, Starsaja A, Stübbe O, Preu S. Terahertz Axicon Lenses. 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, NJ: IEEE; 2026.","ama":"Shrotri AN, Joshi S, Vogel L, Starsaja A, Stübbe O, Preu S. <i>Terahertz Axicon Lenses</i>. IEEE; 2026:2. doi:<a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">10.1109/irmmw-thz61557.2025.11319870</a>","ieee":"A. N. Shrotri, S. Joshi, L. Vogel, A. Starsaja, O. Stübbe, and S. Preu, <i>Terahertz Axicon Lenses</i>. Piscataway, NJ: IEEE, 2026, p. 2. doi: <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11319870\">10.1109/irmmw-thz61557.2025.11319870</a>."},"place":"Piscataway, NJ","title":"Terahertz Axicon Lenses"},{"type":"conference_editor_article","author":[{"first_name":"Suraj","last_name":"Joshi","full_name":"Joshi, Suraj"},{"first_name":"Annamarija","full_name":"Starsaja, Annamarija","last_name":"Starsaja"},{"orcid":"0000-0003-2116-156X","first_name":"Abhijeet Narendra","full_name":"Shrotri, Abhijeet Narendra","id":"74090","last_name":"Shrotri"},{"first_name":"Oliver","full_name":"Stübbe, Oliver","last_name":"Stübbe","id":"51864","orcid":"0000-0001-7293-6893"},{"full_name":"Preu, Sascha","last_name":"Preu","first_name":"Sascha"}],"citation":{"short":"S. Joshi, A. Starsaja, A.N. Shrotri, O. Stübbe, S. Preu, Additively-Manufactured Terahertz Waveguides, IEEE, Piscataway, NJ, 2026.","mla":"Joshi, Suraj, et al. “Additively-Manufactured Terahertz Waveguides.” <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>, IEEE, 2026, <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">https://doi.org/10.1109/irmmw-thz61557.2025.11320095</a>.","apa":"Joshi, S., Starsaja, A., Shrotri, A. N., Stübbe, O., &#38; Preu, S. (2026). Additively-Manufactured Terahertz Waveguides. In <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Helsinki, Finland . IEEE. <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">https://doi.org/10.1109/irmmw-thz61557.2025.11320095</a>","ufg":"<b>Joshi, Suraj u. a.</b>: Additively-Manufactured Terahertz Waveguides, Piscataway, NJ 2026.","chicago-de":"Joshi, Suraj, Annamarija Starsaja, Abhijeet Narendra Shrotri, Oliver Stübbe und Sascha Preu. 2026. <i>Additively-Manufactured Terahertz Waveguides</i>. <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Piscataway, NJ: IEEE. doi:<a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">10.1109/irmmw-thz61557.2025.11320095</a>, .","havard":"S. Joshi, A. Starsaja, A.N. Shrotri, O. Stübbe, S. Preu, Additively-Manufactured Terahertz Waveguides, IEEE, Piscataway, NJ, 2026.","bjps":"<b>Joshi S <i>et al.</i></b> (2026) <i>Additively-Manufactured Terahertz Waveguides</i>. Piscataway, NJ: IEEE.","din1505-2-1":"<span style=\"font-variant:small-caps;\">Joshi, Suraj</span> ; <span style=\"font-variant:small-caps;\">Starsaja, Annamarija</span> ; <span style=\"font-variant:small-caps;\">Shrotri, Abhijeet Narendra</span> ; <span style=\"font-variant:small-caps;\">Stübbe, Oliver</span> ; <span style=\"font-variant:small-caps;\">Preu, Sascha</span>: <i>Additively-Manufactured Terahertz Waveguides</i>. Piscataway, NJ : IEEE, 2026","chicago":"Joshi, Suraj, Annamarija Starsaja, Abhijeet Narendra Shrotri, Oliver Stübbe, and Sascha Preu. <i>Additively-Manufactured Terahertz Waveguides</i>. <i>2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Piscataway, NJ: IEEE, 2026. <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">https://doi.org/10.1109/irmmw-thz61557.2025.11320095</a>.","ieee":"S. Joshi, A. Starsaja, A. N. Shrotri, O. Stübbe, and S. Preu, <i>Additively-Manufactured Terahertz Waveguides</i>. Piscataway, NJ: IEEE, 2026. doi: <a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">10.1109/irmmw-thz61557.2025.11320095</a>.","ama":"Joshi S, Starsaja A, Shrotri AN, Stübbe O, Preu S. <i>Additively-Manufactured Terahertz Waveguides</i>. IEEE; 2026. doi:<a href=\"https://doi.org/10.1109/irmmw-thz61557.2025.11320095\">10.1109/irmmw-thz61557.2025.11320095</a>","van":"Joshi S, Starsaja A, Shrotri AN, Stübbe O, Preu S. Additively-Manufactured Terahertz Waveguides. 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, NJ: IEEE; 2026."},"place":"Piscataway, NJ","publication_status":"published","publisher":"IEEE","date_created":"2026-01-16T14:49:35Z","language":[{"iso":"eng"}],"date_updated":"2026-01-21T07:34:28Z","doi":"10.1109/irmmw-thz61557.2025.11320095","title":"Additively-Manufactured Terahertz Waveguides","user_id":"83781","year":"2026","department":[{"_id":"DEP5020"},{"_id":"DEP6020"}],"status":"public","publication":"2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","_id":"13339","keyword":["Optical fibers","Optical fiber sensors","Optical interconnections","Biomedical optical imaging","Optical device fabrication","Production","Optical waveguide components","Three-dimensional printing","Optical waveguides","Lenses"],"abstract":[{"text":"Additive manufacturing (AM) paves the way for low-cost production of optical and terahertz (THz) components such as waveguides, fibers, and lenses [1]–[3]. This work addresses the fabrication and THz characterization of a 3D-printed waveguide composed of cyclic olefin copolymer (TOPAS). Such a waveguide is a convenient and inexpensive tool in the development of THz interconnects, and in applications such as biomedical sensing.","lang":"eng"}],"conference":{"location":"Helsinki, Finland ","name":"50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","end_date":"2025-08-22","start_date":"2025-08-17"}},{"publisher":"IEEE","type":"conference_editor_article","doi":"10.1109/irmmw-thz60956.2024.10697740","date_updated":"2024-10-08T11:47:36Z","status":"public","department":[{"_id":"DEP5020"},{"_id":"DEP6020"}],"user_id":"83781","year":"2024","conference":{"start_date":"2024-09-01","end_date":"2024-09-06","name":"49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","location":"Perth, Australia "},"abstract":[{"text":"Additive manufacturing of lenses offers quick prototyping and characterization. This paper explains the additive manufacturing and characterization of axicon lenses using TOPAS material for Terahertz sensing applications. The beam patterns of additively manufactured axicon lens prototypes are characterized around 0.3 THz with silicon-based THz-camera to evaluate the depth of focus.","lang":"eng"}],"keyword":["Additives","Prototypes","Three-dimensional printing","Sensors","Lenses"],"date_created":"2024-10-08T08:11:34Z","language":[{"iso":"eng"}],"volume":2024,"publication_status":"published","place":"Piscataway, NJ","citation":{"ufg":"<b>Shrotri, Abhijeet Narendra u. a.</b>: Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera, Bd. 2024, Piscataway, NJ 2024 (International Conference on Infrared, Millimeter, and Terahertz Waves).","chicago-de":"Shrotri, Abhijeet Narendra, Benedikt Krause, Oliver Stübbe, Ullrich Pfeiffer und Sascha Preu. 2024. <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>. <i>2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Bd. 2024. International Conference on Infrared, Millimeter, and Terahertz Waves. Piscataway, NJ: IEEE. doi:<a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">10.1109/irmmw-thz60956.2024.10697740</a>, .","short":"A.N. Shrotri, B. Krause, O. Stübbe, U. Pfeiffer, S. Preu, Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera, IEEE, Piscataway, NJ, 2024.","apa":"Shrotri, A. N., Krause, B., Stübbe, O., Pfeiffer, U., &#38; Preu, S. (2024). Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera. In <i>2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i> (Vol. 2024). IEEE. <a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">https://doi.org/10.1109/irmmw-thz60956.2024.10697740</a>","mla":"Shrotri, Abhijeet Narendra, et al. “Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera.” <i>2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>, vol. 2024, IEEE, 2024, <a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">https://doi.org/10.1109/irmmw-thz60956.2024.10697740</a>.","havard":"A.N. Shrotri, B. Krause, O. Stübbe, U. Pfeiffer, S. Preu, Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera, IEEE, Piscataway, NJ, 2024.","chicago":"Shrotri, Abhijeet Narendra, Benedikt Krause, Oliver Stübbe, Ullrich Pfeiffer, and Sascha Preu. <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>. <i>2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)</i>. Vol. 2024. International Conference on Infrared, Millimeter, and Terahertz Waves. Piscataway, NJ: IEEE, 2024. <a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">https://doi.org/10.1109/irmmw-thz60956.2024.10697740</a>.","bjps":"<b>Shrotri AN <i>et al.</i></b> (2024) <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>. Piscataway, NJ: IEEE.","din1505-2-1":"<span style=\"font-variant:small-caps;\">Shrotri, Abhijeet Narendra</span> ; <span style=\"font-variant:small-caps;\">Krause, Benedikt</span> ; <span style=\"font-variant:small-caps;\">Stübbe, Oliver</span> ; <span style=\"font-variant:small-caps;\">Pfeiffer, Ullrich</span> ; <span style=\"font-variant:small-caps;\">Preu, Sascha</span>: <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>, <i>International Conference on Infrared, Millimeter, and Terahertz Waves</i>. Bd. 2024. Piscataway, NJ : IEEE, 2024","ama":"Shrotri AN, Krause B, Stübbe O, Pfeiffer U, Preu S. <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>. Vol 2024. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">10.1109/irmmw-thz60956.2024.10697740</a>","van":"Shrotri AN, Krause B, Stübbe O, Pfeiffer U, Preu S. Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera. 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, NJ: IEEE; 2024. (International Conference on Infrared, Millimeter, and Terahertz Waves; vol. 2024).","ieee":"A. N. Shrotri, B. Krause, O. Stübbe, U. Pfeiffer, and S. Preu, <i>Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera</i>, vol. 2024. Piscataway, NJ: IEEE, 2024. doi: <a href=\"https://doi.org/10.1109/irmmw-thz60956.2024.10697740\">10.1109/irmmw-thz60956.2024.10697740</a>."},"publication_identifier":{"eissn":["2162-2035"]},"intvolume":"      2024","author":[{"first_name":"Abhijeet Narendra","full_name":"Shrotri, Abhijeet Narendra","id":"74090","last_name":"Shrotri","orcid":"0000-0003-2116-156X"},{"last_name":"Krause","full_name":"Krause, Benedikt","first_name":"Benedikt"},{"orcid":"0000-0001-7293-6893","full_name":"Stübbe, Oliver","last_name":"Stübbe","id":"51864","first_name":"Oliver"},{"last_name":"Pfeiffer","full_name":"Pfeiffer, Ullrich","first_name":"Ullrich"},{"full_name":"Preu, Sascha","last_name":"Preu","first_name":"Sascha"}],"title":"Evaluation of Additively Manufactured Axicon Lenses Using a THz-Camera","publication":"2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)","series_title":"International Conference on Infrared, Millimeter, and Terahertz Waves","_id":"11977"}]