Ultrafast modulation of the spectral filtering properties of a THz metasurface

Optics Express
Lauren GingrasJean-Michel Ménard

Abstract

We demonstrate ultrafast tuning of a plasmonic spectral filter at terahertz (THz) frequencies. The device is made of periodically spaced gold crosses deposited on the surface of an undoped silicon wafer in which transient free carriers can be optically injected with a femtosecond resonant pulse. We demonstrate the concept by measuring the transmission spectrum of a notch filter using time-domain THz spectroscopy. Proper synchronization of the THz probe and visible excitation pulses leads to an enhanced transmission at the resonance by more than two orders of magnitude. Finite-difference time-domain simulations, which are in agreement with the experimental results, show that the underlying mechanisms responsible for the resonance blueshift and linewidth broadening can be attributed to the photoinduced change in dielectric properties of the substrate. This is supported by the numerically simulated field distribution and reflection/transmission coefficients. The device can be used in future pulse shaping and ultrafast switching experiments.

References

Jul 14, 1986·Physical Review Letters·E YablonovitchT B Bright
Oct 21, 2000·Physical Review Letters·J B Pendry
Apr 9, 2001·Science·R A ShelbyS Schultz
Oct 4, 2005·Physical Review Letters·Shuang ZhangS R J Brueck
Dec 1, 2006·Nature·Hou-Tong ChenRichard D Averitt
Jun 4, 2008·Physical Review Letters·N I LandyW J Padilla
Jun 12, 2008·Optics Express·Holger Fischer, Olivier J F Martin
Nov 13, 2008·Applied Optics·Arline M MeloAlexandre M P Alves da Silva
Aug 22, 2009·Science·T DriscollD N Basov
Feb 15, 1987·Applied Optics·M A OrdalM R Querry
May 18, 2010·Nano Letters·Minah SeoDai-sik Kim
Sep 28, 2010·Physical Review Letters·Xianliang LiuWillie J Padilla
Sep 1, 1994·Applied Optics·D W PorterfieldR M Weikle Ii
Apr 1, 2011·Optics Express·Ranjan SinghWeili Zhang
Oct 17, 2014·Optics Express·Zhengli HanHiroshi Toshiyoshi
Nov 18, 2014·Optics Express·Quanlong YangWeili Zhang
Oct 16, 2016·Scientific Reports·Mohammed Reza M HashemiMona Jarrahi
Nov 20, 2016·Advanced Materials·Manukumara ManjappaRanjan Singh
Oct 7, 2017·Science·Mohammadreza Khorasaninejad, Federico Capasso
Jan 13, 2018·Advanced Materials·Wen Xiang LimRanjan Singh
Jun 8, 2018·Optics Express·Lauren GingrasDavid G Cooke
Mar 5, 2020·Science Advances·Abhishek KumarRanjan Singh

❮ Previous
Next ❯

Citations

Mar 18, 2021·Optics Express·Li JiangLi Gao
Jul 17, 2021·Optics Express·Jing ZhaoWeili Zhang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cell Imaging in CNS

Here is the latest research on cell imaging and imaging modalities, including light-sheet microscopy, in the central nervous system.