| Full text | |
| Author(s): |
Pita, Julian L.
[1]
;
Aldaya, Ivan
[2, 3]
;
Santana, Octavio J. S.
[2]
;
De Araujo, Luis E. E.
[2]
;
Dainese, Paulo
[2]
;
Gabrielli, Lucas H.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Campinas UNICAMP, Sch Elect & Comp Engn, BR-13083852 Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] State Univ Sao Paulo UNESP, Campus Sao Joao de Boa Vista, BR-13876750 Sao Paulo, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Optics Express; v. 25, n. 24, p. 30105-30114, NOV 27 2017. |
| Web of Science Citations: | 6 |
| Abstract | |
Phased arrays are expected to play a critical role in visible and infrared wireless systems. Their improved performance compared to single element antennas finds uses in communications, imaging, and sensing. However, fabrication of photonic antennas and their feeding network require long element separation, leading to the appearance of secondary radiation lobes and, consequently, crosstalk and interference. In this work, we experimentally show that by arranging the elements according to the Fermat's spiral, the side lobe level (SLL) can be reduced. This reduction is proved in a CMOS-compatible 8-element array, revealing a SLL decrement of 0.9 dB. Arrays with larger numbers of elements and inter-element spacing are demonstrated through a spatial light modulator (SLM) and an SLL drop of 6.9 dB is measured for a 64-element array. The reduced SLL, consequently, makes the proposed approach a promising candidate for applications in which antenna gain, power loss, or information security are key requirements. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (AU) | |
| FAPESP's process: | 08/57857-2 - Photonics for optical communications |
| Grantee: | Hugo Luis Fragnito |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/04113-0 - Nonlinearities in Silicon-based Waveguides |
| Grantee: | Ivan Aritz Aldaya Garde |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/20180-3 - Light scattering processes in photonic microstructures |
| Grantee: | Paulo Clóvis Dainese Júnior |
| Support Opportunities: | Research Grants - Young Investigators Grants |