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Title: Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature

Abstract

Extraordinary optical transmission through subwavelength metallic hole-arrays has been an active research area since its first demonstration. The frequency selective resonance properties of subwavelength metallic hole arrays, generally known as surface plasmon polaritons, have potential use in functional plasmonic devices such as filters, modulators, switches, etc. Such plasmonic devices are also very promising for future terahertz applications. Ultrafast switching or modulation of the resonant behavior of the 2-D metallic arrays in terahertz frequencies is of particular interest for high speed communication and sensing applications. In this paper, we demonstrate optical control of surface plasmon enhanced resonant terahertz transmission in two-dimensional subwavelength metallic hole arrays fabricated on gallium arsenide based substrates. Optically pumping the arrays creates a conductive layer in the substrate reducing the terahertz transmission amplitude of both the resonant mode and the direct transmission. Under low optical fluence, the terahertz transmission is more greatly affected by resonance damping than by propagation loss in the substrate. An ErAs:GaAs nanoisland superlattice substrate is shown to allow ultrafast control with a switching recovery time of {approx}10 ps. We also present resonant terahertz transmission in a hybrid plasmonic film comprised of an integrated array of subwavelength metallic islands and semiconductor holes. A largemore » dynamic transition between a dipolar localized surface plasmon mode and a surface plasmon resonance near 0.8 THz is observed under near infrared optical excitation. The reversal in transmission amplitude from a stopband to a passband and up to {pi}/2 phase shift achieved in the hybrid plasmonic film make it promising in large dynamic phase modulation, optical changeover switching, and active terahertz plasmonics.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1044142
Report Number(s):
LA-UR-10-08227; LA-UR-10-8227
TRN: US1203342
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: SPIE Photonics West ; January 22, 2011 ; San Francisco, Ca
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; COMMUNICATIONS; DAMPING; EXCITATION; FUNCTIONALS; GALLIUM ARSENIDES; ISLANDS; MODULATION; PHASE SHIFT; PLASMONS; POLARONS; PUMPING; RESONANCE; SUBSTRATES; SUPERLATTICES; SWITCHES

Citation Formats

Azad, Abul Kalam, Chen, Hou - Tong, Taylor, Antoinette, and O' Hara, John. Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature. United States: N. p., 2010. Web.
Azad, Abul Kalam, Chen, Hou - Tong, Taylor, Antoinette, & O' Hara, John. Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature. United States.
Azad, Abul Kalam, Chen, Hou - Tong, Taylor, Antoinette, and O' Hara, John. Fri . "Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature". United States. https://www.osti.gov/servlets/purl/1044142.
@article{osti_1044142,
title = {Ultrafast optical control of terahertz surface plasmons in subwavelength hole-arrays at room temperature},
author = {Azad, Abul Kalam and Chen, Hou - Tong and Taylor, Antoinette and O' Hara, John},
abstractNote = {Extraordinary optical transmission through subwavelength metallic hole-arrays has been an active research area since its first demonstration. The frequency selective resonance properties of subwavelength metallic hole arrays, generally known as surface plasmon polaritons, have potential use in functional plasmonic devices such as filters, modulators, switches, etc. Such plasmonic devices are also very promising for future terahertz applications. Ultrafast switching or modulation of the resonant behavior of the 2-D metallic arrays in terahertz frequencies is of particular interest for high speed communication and sensing applications. In this paper, we demonstrate optical control of surface plasmon enhanced resonant terahertz transmission in two-dimensional subwavelength metallic hole arrays fabricated on gallium arsenide based substrates. Optically pumping the arrays creates a conductive layer in the substrate reducing the terahertz transmission amplitude of both the resonant mode and the direct transmission. Under low optical fluence, the terahertz transmission is more greatly affected by resonance damping than by propagation loss in the substrate. An ErAs:GaAs nanoisland superlattice substrate is shown to allow ultrafast control with a switching recovery time of {approx}10 ps. We also present resonant terahertz transmission in a hybrid plasmonic film comprised of an integrated array of subwavelength metallic islands and semiconductor holes. A large dynamic transition between a dipolar localized surface plasmon mode and a surface plasmon resonance near 0.8 THz is observed under near infrared optical excitation. The reversal in transmission amplitude from a stopband to a passband and up to {pi}/2 phase shift achieved in the hybrid plasmonic film make it promising in large dynamic phase modulation, optical changeover switching, and active terahertz plasmonics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {12}
}

Conference:
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