Integrated all-optical infrared switchable plasmonic quantum cascade laser

John Kohoutek; Alireza Bonakdar; Ryan Gelfand; Dibyendu Dey; Iman Hassani Nia; Vala Fathipour; Omer Gokalp Memis; Hooman Mohseni

doi:10.1021/nl3007424

Integrated all-optical infrared switchable plasmonic quantum cascade laser

John Kohoutek, Alireza Bonakdar, Ryan Gelfand, Dibyendu Dey, Iman Hassani Nia, Vala Fathipour, Omer Gokalp Memis, Hooman Mohseni^*

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We report a type of infrared switchable plasmonic quantum cascade laser, in which far field light in the midwave infrared (MWIR, 6.1 μm) is modulated by a near field interaction of light in the telecommunications wavelength (1.55 μm). To achieve this all-optical switch, we used cross-polarized bowtie antennas and a centrally located germanium nanoslab. The bowtie antenna squeezes the short wavelength light into the gap region, where the germanium is placed. The perturbation of refractive index of the germanium due to the free carrier absorption produced by short wavelength light changes the optical response of the antenna and the entire laser intensity at 6.1 μm significantly. This device shows a viable method to modulate the far field of a laser through a near field interaction.

Original language	English (US)
Pages (from-to)	2537-2541
Number of pages	5
Journal	Nano letters
Volume	12
Issue number	5
DOIs	https://doi.org/10.1021/nl3007424
State	Published - May 9 2012

Keywords

Nanoantenna
QCL
all-optical switch
infrared
plasmonics
strong coupling
terahertz

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Mechanical Engineering
Bioengineering
General Materials Science

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10.1021/nl3007424

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title = "Integrated all-optical infrared switchable plasmonic quantum cascade laser",

abstract = "We report a type of infrared switchable plasmonic quantum cascade laser, in which far field light in the midwave infrared (MWIR, 6.1 μm) is modulated by a near field interaction of light in the telecommunications wavelength (1.55 μm). To achieve this all-optical switch, we used cross-polarized bowtie antennas and a centrally located germanium nanoslab. The bowtie antenna squeezes the short wavelength light into the gap region, where the germanium is placed. The perturbation of refractive index of the germanium due to the free carrier absorption produced by short wavelength light changes the optical response of the antenna and the entire laser intensity at 6.1 μm significantly. This device shows a viable method to modulate the far field of a laser through a near field interaction.",

keywords = "Nanoantenna, QCL, all-optical switch, infrared, plasmonics, strong coupling, terahertz",

author = "John Kohoutek and Alireza Bonakdar and Ryan Gelfand and Dibyendu Dey and {Hassani Nia}, Iman and Vala Fathipour and Memis, {Omer Gokalp} and Hooman Mohseni",

year = "2012",

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doi = "10.1021/nl3007424",

language = "English (US)",

volume = "12",

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journal = "Nano letters",

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T1 - Integrated all-optical infrared switchable plasmonic quantum cascade laser

AU - Kohoutek, John

AU - Bonakdar, Alireza

AU - Gelfand, Ryan

AU - Dey, Dibyendu

AU - Hassani Nia, Iman

AU - Fathipour, Vala

AU - Memis, Omer Gokalp

AU - Mohseni, Hooman

PY - 2012/5/9

Y1 - 2012/5/9

N2 - We report a type of infrared switchable plasmonic quantum cascade laser, in which far field light in the midwave infrared (MWIR, 6.1 μm) is modulated by a near field interaction of light in the telecommunications wavelength (1.55 μm). To achieve this all-optical switch, we used cross-polarized bowtie antennas and a centrally located germanium nanoslab. The bowtie antenna squeezes the short wavelength light into the gap region, where the germanium is placed. The perturbation of refractive index of the germanium due to the free carrier absorption produced by short wavelength light changes the optical response of the antenna and the entire laser intensity at 6.1 μm significantly. This device shows a viable method to modulate the far field of a laser through a near field interaction.

AB - We report a type of infrared switchable plasmonic quantum cascade laser, in which far field light in the midwave infrared (MWIR, 6.1 μm) is modulated by a near field interaction of light in the telecommunications wavelength (1.55 μm). To achieve this all-optical switch, we used cross-polarized bowtie antennas and a centrally located germanium nanoslab. The bowtie antenna squeezes the short wavelength light into the gap region, where the germanium is placed. The perturbation of refractive index of the germanium due to the free carrier absorption produced by short wavelength light changes the optical response of the antenna and the entire laser intensity at 6.1 μm significantly. This device shows a viable method to modulate the far field of a laser through a near field interaction.

KW - Nanoantenna

KW - QCL

KW - all-optical switch

KW - infrared

KW - plasmonics

KW - strong coupling

KW - terahertz

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JO - Nano letters

JF - Nano letters

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ER -

Integrated all-optical infrared switchable plasmonic quantum cascade laser

Abstract

Keywords

ASJC Scopus subject areas

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