Title :
Passivity limitations on absorption properties of low-scattering objects
Author :
Estakhri, Nasim Mohammadi ; Fleury, Romain ; Soric, Jason ; Alu, Andrea
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
We analyze the constraints governing absorption and scattering of arbitrary sensors or receiving antennas. Our findings bring forward interesting physical limitations on the amount of accessible absorption in a low-scattering sensor and suggest practical ways to achieve efficient designs for noninvasive sensors, based on the application needs. A subwavelength dipole antenna is studied as a numerical demonstration of our theory in the subwavelength limit.
Keywords :
dipole antennas; light absorption; light scattering; numerical analysis; optical design techniques; optical sensors; photodetectors; absorption properties; low-scattering objects; low-scattering sensor; optical designs; receiving antennas; subwavelength dipole antenna; Absorption; Dipole antennas; Receiving antennas; Scattering; Sensors;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on
Conference_Location :
Talence
Print_ISBN :
978-1-4799-1229-2
DOI :
10.1109/MetaMaterials.2013.6809074
