Title: Terahertz rectification in ring-shaped quantum barriers

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [3];  [4];  [5];  [5]; ORCiD logo [6];  [4]
  1. Seoul National Univ. (Korea, Republic of). Center for Atom Scale Electromagnetism. Dept. of Physics and Astronomy; DOE/OSTI
  2. Seoul National Univ. (Korea, Republic of). Center for Atom Scale Electromagnetism. Dept. of Physics and Astronomy; Ames Lab., and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  3. Seoul National Univ. (Korea, Republic of). Center for Atom Scale Electromagnetism. Dept. of Physics and Astronomy; Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Energy Science
  4. Seoul National Univ. (Korea, Republic of). Center for Atom Scale Electromagnetism. Dept. of Physics and Astronomy
  5. Hanyang Univ., Seoul (Korea, Republic of). Division of Materials Science and Engineering
  6. Seoul National Univ. (Korea, Republic of). Center for Theoretical Physics. Dept. of Physics and Astronomy

Tunneling is the most fundamental quantum mechanical phenomenon with wide-ranging applications. Matter waves such as electrons in solids can tunnel through a one-dimensional potential barrier, e.g. an insulating layer sandwiched between conductors. A general approach to control tunneling currents is to apply voltage across the barrier. Here, we form closed loops of tunneling barriers exposed to external optical control to manipulate ultrafast tunneling electrons. Eddy currents induced by incoming electromagnetic pulses project upon the ring, spatiotemporally changing the local potential. The total tunneling current which is determined by the sum of contributions from all the parts along the perimeter is critically dependent upon the symmetry of the loop and the polarization of the incident fields, enabling full-wave rectification of terahertz pulses. By introducing global geometry and local operation to current-driven circuitry, our work provides a novel platform for ultrafast optoelectronics, macroscopic quantum phenomena, energy harvesting, and multi-functional quantum devices.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1624125
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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