Browse > Article
http://dx.doi.org/10.3807/COPP.2018.2.6.508

Theoretical Study of the Strong Field Emission of Electrons inside a Nanogap Due to an Enhanced Terahertz Field  

Choi, Soo Bong (Department of Physics, Incheon National University)
Byeon, Clare Chisu (School of Mechanical Engineering, Kyungpook National University)
Park, Doo Jae (School of Nanoconvergence Technolgy, Hallym University)
Publication Information
Current Optics and Photonics / v.2, no.6, 2018 , pp. 508-513 More about this Journal
Abstract
We report the development of a theoretical model describing the strong field tunneling of electrons in an extremely small nanogap (having a width of a few nanometers) that is driven by terahertz-pulse irradiation, by modifying a conventional semiclassical model that is widely applied for near-infrared wavelengths. We demonstrate the effects of carrier-envelope phase difference and strength of the incident THz field on the tunneling current across the nanogap. Additionally, we show that the dc bias also contributes to the generation of tunneling current, but the nature of the contribution is completely different for different carrier-envelope phases.
Keywords
Subwavelength structures; Strong field tunneling; Terahertz Field Enhancement;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. B. Choi and D. J. Park, "Ultrafast optical switching of terahertz wave transmission through semiconductor/metallic subwavelength slot antenna hybrid structure," Curr. Appl. Phys. 16, 109-114 (2016).   DOI
2 J. Jeong, H. S. Yun, D. Kim, K. S. Lee, H.-K. Choi, Z. H. Kim, S. W. Lee, and D.-S. Kim, "High contrast detection of water-filled terahertz nanotrenches," Adv. Opt. Mater. 6, 1800582.
3 X. Chen, H.-R. Park, M. Pelton, X. Piao, N. C. Lindquist, H. Im, Y. J. Kim, J. S. Ahn, K. J. Ahn, N. Park, D.-S. Kim, and S.-H. Oh, "Atomic layer lithography of wafer-scale nanogap arrays for extreme confinement of electromagnetic waves," Nat. Commun. 4, 2361 (2013).   DOI
4 Y.-M. Bahk, B. J. Kang, Y. S. Kim, J.-Y. Kim, W. T. Kim, T. Y. Kim, T. Kang, J. Rhie, S. Han, C.-H. Park, F. Rotermund, and D.-S. Kim, "Electromagnetic saturation of angstrom-sized quantum barriers at terahertz frequencies," Phys. Rev. Lett. 115, 125501 (2015).   DOI
5 D. J. Park, B. Piglosiewicz, S. Schmidt, H. Kollmann, M. Mascheck, P. Gross, and C. Lienau, "Characterizing the optical near-field in the vicinity of a sharp metallic nanoprobe by angle-resolved electron kinetic energy spectroscopy," Annalen der Physik 525, 135-142 (2013).   DOI
6 S. Han, J.-Y. Kim, T. Kang, Y.-M. Bahk, J. Rhie, B. J. Kang, Y. S. Kim, J. Park, W. T. Kim, H. Jeon, F. Rotermund, and D.-S. Kim, "Colossal terahertz nonlinearity in angstrom- and nanometer-sized gaps," ACS Photon. 3, 1440-1445 (2016).   DOI
7 P. Hommelhoff, Y. Sortais, A. Aghajani-Talesh, and M. A. Kasevich, "Field emission tip as a nanometer source of free electron femtosecond pulses," Phys. Rev. Lett. 96, 077401 (2006).   DOI
8 D. J. Park, B. Piglosiewicz, S. Schmidt, H. Kollmann, M. Mascheck, and C. Lienau, "Strong field acceleration and steering of ultrafast electron pulses from a sharp metallic nanotip," Phys. Rev. Lett. 109, 244803 (2012).   DOI
9 B. H. Son, H. S. Kim, J.-Y. Park, S. Lee, D. J. Park, and Y. H. Ahn, "Ultrafast strong-field tunneling emission in graphene nanogaps," ACS Photon. 5, 3943-3949 (2018).   DOI
10 G. Herink, D. R. Solli, M. Gulde, and C. Ropers, "Fielddriven photoemission from nanostructures quenches the quiver motion," Nature 483, 190 (2012).   DOI
11 H. Yang, D.-S. Kim, R. H. J.-Y. Kim, J. S. Ahn, T. Kang, J. Jeong, and D. Lee, "Magnetic nature of light transmission through a 5-nm gap," Sci. Rep. 8, 2751 (2018).   DOI
12 J. Rhie, D. Lee, Y.-M. Bahk, J. Jeong, G. Choi, Y. Lee, S. Kim, S. Hong, and D.-S. Kim, "Control of optical nanometer gap shapes made via standard lithography using atomic layer deposition," J. Micro/Nanolithogr., MEMS, MOEMS 17, 023504 (2018).
13 J.-Y. Kim, B. J. Kang, J. Park, Y.-M. Bahk, W. T. Kim, J. Rhie, H. Jeon, F. Rotermund, and D.-S. Kim, "Terahertz quantum plasmonics of nanoslot antennas in nonlinear regime," Nano Lett. 15, 6683-6688 (2015).   DOI
14 B. Piglosiewicz, S. Schmidt, D. J. Park, J. Vogelsang, P. Gross, C. Manzoni, P. Farinello, G. Cerullo, and C. Lienau, "Carrier-envelope phase effects on the strong-field photoemission of electrons from metallic nanostructures," Nat. Photon. 8, 37 (2013).
15 P. J. Potts, A Handbook of Silicate Rock Analysis (Springer, 1992).
16 G. Herink, L. Wimmer, and C. Ropers, "Field emission at terahertz frequencies: AC-tunneling and ultrafast carrier dynamics," New J. Phys. 16, 123005 (2014).   DOI
17 M. Kruger, M. Schenk, and P. Hommelhoff, "Attosecond control of electrons emitted from a nanoscale metal tip," Nature 475, 78 (2011).   DOI