@inproceedings{5580385278ee4ce8806732ef4c3c451a,
title = "Revisiting beamforming under the prism of inverse methods",
abstract = "Beamforming, namely exciting properly a set of sources whose collective radiation mimics a given pattern, is an inherently inverse problem. Since the inverse design methods are recently being introduced in photonic systems leading to devices of unprecedented efficiency, we reconsider beamforming in this context. Accordingly, flawless beam-shaping is reported for the simple case of multiple emitters placed along a line. The key parameter to fulfill such an objective is the distance between two consecutive antennas which should obey an approximate inequality, securing both diversity and coherence for the emitting patterns. This condition cannot be attained when infinite directivity is demanded; however, ultra-narrow radiation lobes are developed for the suitable, inversely-determined excitations.",
keywords = "Antenna directivity, Beamforming, Inverse design, Laser emitters, Phased array.",
author = "Constantinos Valagiannopoulos and Vassilios Kovanis",
note = "Funding Information: This work was partially supported by Nazarbayev University Small Grants with project entitled: “Super transmitters, radiators and lenses via photonic synthetic matter” (no. 090118FD5349). Funding from MES RK state-targeted program BR05236454 is also acknowledged. Publisher Copyright: {\textcopyright} 2019 SPIE.; Physics and Simulation of Optoelectronic Devices XXVII 2019 ; Conference date: 05-02-2019 Through 07-02-2019",
year = "2019",
doi = "10.1117/12.2509452",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Bernd Witzigmann and Marek Osinski and Yasuhiko Arakawa",
booktitle = "Physics and Simulation of Optoelectronic Devices XXVII",
address = "United States",
}