Resonant tunneling diode integrated with metalens for high-directivity terahertz waves | Zendy

Kota Endo | Zendy; Masashi Sekiya | Zendy; Jae-Young Kim | Zendy; Kento Sato | Zendy; Takehito Suzuki | Zendy

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Resonant tunneling diode integrated with metalens for high-directivity terahertz waves

Author(s) -

Kota Endo,

Masashi Sekiya,

Jae-Young Kim,

Kento Sato,

Takehito Suzuki

Publication year - 2021

Publication title -

applied physics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.911

H-Index - 94

eISSN - 1882-0786

pISSN - 1882-0778

DOI - 10.35848/1882-0786/ac0678

Subject(s) - terahertz radiation , directivity , optics , resonant tunneling diode , optoelectronics , collimated light , planar , reflection (computer programming) , diode , quantum tunnelling , refractive index , physics , materials science , telecommunications , laser , engineering , computer science , quantum well , computer graphics (images) , antenna (radio) , programming language

Terahertz flat optics based on our originally developed low-reflection metasurface with a high refractive index can offer attractive two-dimensional optical components for the manipulation of terahertz waves. However, it remains to be shown whether a planar collimating metalens made with our original metasurface could be mounted on a resonant tunneling diode with a short distance. Here, we demonstrate that a collimating metalens with a distance of 1.0 mm from the RTD enhances the directivity to 3.0 times at 0.312 THz. The proposed metalens would be integrated with various terahertz continuous-wave sources for emerging industry such as 6 G (beyond 5 G) communications.

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