Work

Diffraction effects in highly defocused THz beams

Year: 2025

Type: article

Abstract: Terahertz communication links will require the use of directional beams to compensate for the higher losses compared to those faced in the few gigahertz region. The shorter wavelengths of terahertz waves also imply less diffraction from objects that may be present in many scenarios, such as books, bottles of water, or people. We present measurements of the frequency-dependent transmission losses for moderately divergent beams, with beam waists in the range of tens of centimeters, interacting with blockages. We compare our measurements with a quasi-optical treatment of these interactions based on the Fresnel diffraction theory. These results will inform the development of future generations of ultra-broadband communication technologies operating above 100 GHz.

Source: Optics Express

DOI: 10.1364/oe.575288

Authors: Felix Gorka, Enrique Castro-Camus, Daniel M. Mittleman, Martin Koch

Institutions: Philipps University of Marburg, Brown University

Language: English

Topic: Millimeter-Wave Propagation and Modeling

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Alexander von Humboldt-Stiftung, Philipps-Universität Marburg, Deutsche Forschungsgemeinschaft