High performance spatial light modulators for terahertz applications

Md Nadim Ferdous Hoque; Gulten Karaoglan-Bebek; Mark Holtz; Ayrton A. Bernussi; Zhaoyang Fan

doi:10.1016/j.optcom.2015.04.022

High performance spatial light modulators for terahertz applications

Md Nadim Ferdous Hoque, Gulten Karaoglan-Bebek, Mark Holtz, Ayrton A. Bernussi, Zhaoyang Fan

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

37 Scopus citations

Abstract

We demonstrate large-contrast, low-crosstalk, low-power, and broadband spatial light modulators (SLMs) for operation at terahertz (THz) frequencies. The electro-thermally activated SLMs rely on the insulator-metal-phase transition of two VO₂ thin films deposited on opposite sides of a sapphire substrate. We validated the effectiveness of our approach by fabricating and testing 2×2 pixel SLM prototypes. Record high amplitude modulation depth of 96%, -30 dB pixel-to-pixel crosstalk and precise THz transmission control was determined for the fabricated SLMs over a broad range of THz frequencies. Raster scanning THz transmission revealed excellent pixel uniformity with very large on/off contrast. These attributes are fundamental for high-contrast THz imaging and spectroscopy applications.

Original language	English (US)
Pages (from-to)	309-314
Number of pages	6
Journal	Optics Communications
Volume	350
DOIs	https://doi.org/10.1016/j.optcom.2015.04.022
State	Published - Sep 1 2015
Externally published	Yes

Keywords

Metal-insulator transition
Modulator
THz spatial light modulator
VO<inf>2</inf>

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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10.1016/j.optcom.2015.04.022

Cite this

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title = "High performance spatial light modulators for terahertz applications",

abstract = "We demonstrate large-contrast, low-crosstalk, low-power, and broadband spatial light modulators (SLMs) for operation at terahertz (THz) frequencies. The electro-thermally activated SLMs rely on the insulator-metal-phase transition of two VO2 thin films deposited on opposite sides of a sapphire substrate. We validated the effectiveness of our approach by fabricating and testing 2×2 pixel SLM prototypes. Record high amplitude modulation depth of 96%, -30 dB pixel-to-pixel crosstalk and precise THz transmission control was determined for the fabricated SLMs over a broad range of THz frequencies. Raster scanning THz transmission revealed excellent pixel uniformity with very large on/off contrast. These attributes are fundamental for high-contrast THz imaging and spectroscopy applications.",

keywords = "Metal-insulator transition, Modulator, THz spatial light modulator, VO<inf>2</inf>",

author = "{Ferdous Hoque}, {Md Nadim} and Gulten Karaoglan-Bebek and Mark Holtz and Bernussi, {Ayrton A.} and Zhaoyang Fan",

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doi = "10.1016/j.optcom.2015.04.022",

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T1 - High performance spatial light modulators for terahertz applications

AU - Ferdous Hoque, Md Nadim

AU - Karaoglan-Bebek, Gulten

AU - Holtz, Mark

AU - Bernussi, Ayrton A.

AU - Fan, Zhaoyang

PY - 2015/9/1

Y1 - 2015/9/1

N2 - We demonstrate large-contrast, low-crosstalk, low-power, and broadband spatial light modulators (SLMs) for operation at terahertz (THz) frequencies. The electro-thermally activated SLMs rely on the insulator-metal-phase transition of two VO2 thin films deposited on opposite sides of a sapphire substrate. We validated the effectiveness of our approach by fabricating and testing 2×2 pixel SLM prototypes. Record high amplitude modulation depth of 96%, -30 dB pixel-to-pixel crosstalk and precise THz transmission control was determined for the fabricated SLMs over a broad range of THz frequencies. Raster scanning THz transmission revealed excellent pixel uniformity with very large on/off contrast. These attributes are fundamental for high-contrast THz imaging and spectroscopy applications.

AB - We demonstrate large-contrast, low-crosstalk, low-power, and broadband spatial light modulators (SLMs) for operation at terahertz (THz) frequencies. The electro-thermally activated SLMs rely on the insulator-metal-phase transition of two VO2 thin films deposited on opposite sides of a sapphire substrate. We validated the effectiveness of our approach by fabricating and testing 2×2 pixel SLM prototypes. Record high amplitude modulation depth of 96%, -30 dB pixel-to-pixel crosstalk and precise THz transmission control was determined for the fabricated SLMs over a broad range of THz frequencies. Raster scanning THz transmission revealed excellent pixel uniformity with very large on/off contrast. These attributes are fundamental for high-contrast THz imaging and spectroscopy applications.

KW - Metal-insulator transition

KW - Modulator

KW - THz spatial light modulator

KW - VO<inf>2</inf>

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JO - Optics Communications

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ER -

High performance spatial light modulators for terahertz applications

Abstract

Keywords

ASJC Scopus subject areas

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