Spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors with bandpass guided-mode resonance filters

Ian Mckerracher; Lan Fu; Hark Hoe Tan; Chennupati Jagadish

doi:10.1002/pssr.201308188

Spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors with bandpass guided-mode resonance filters

Ian Mckerracher, Lan Fu^*, Hark Hoe Tan, Chennupati Jagadish

^*Corresponding author for this work

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

Abstract

Quantum dot infrared photodetectors can be coupled with micro-structured filters to create narrowband sensors. Guided-mode resonance filters based on a high-index dielectric slab can exhibit bandpass characteristics that are suitable for monolithic integration with focal-plane arrays. Here, patterned Ge filters were integrated with InGaAs/GaAs quantum dot detectors to linearly tune their 77 K photoresponse peaks from 5.6 μm to 6.2 μm. The dark current was not influenced by these filters but the ability to narrow the photoresponse linewidth was limited by substrate scattering, which is often encountered with front-side illumination architectures.

Original language	English
Pages (from-to)	69-73
Number of pages	5
Journal	Physica Status Solidi - Rapid Research Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1002/pssr.201308188
Publication status	Published - Jan 2014

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title = "Spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors with bandpass guided-mode resonance filters",

abstract = "Quantum dot infrared photodetectors can be coupled with micro-structured filters to create narrowband sensors. Guided-mode resonance filters based on a high-index dielectric slab can exhibit bandpass characteristics that are suitable for monolithic integration with focal-plane arrays. Here, patterned Ge filters were integrated with InGaAs/GaAs quantum dot detectors to linearly tune their 77 K photoresponse peaks from 5.6 μm to 6.2 μm. The dark current was not influenced by these filters but the ability to narrow the photoresponse linewidth was limited by substrate scattering, which is often encountered with front-side illumination architectures.",

keywords = "Infrared photodetectors, Optical filters, Photonic crystals, Quantum dots",

author = "Ian Mckerracher and Lan Fu and Tan, {Hark Hoe} and Chennupati Jagadish",

year = "2014",

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doi = "10.1002/pssr.201308188",

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AU - Tan, Hark Hoe

AU - Jagadish, Chennupati

PY - 2014/1

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AB - Quantum dot infrared photodetectors can be coupled with micro-structured filters to create narrowband sensors. Guided-mode resonance filters based on a high-index dielectric slab can exhibit bandpass characteristics that are suitable for monolithic integration with focal-plane arrays. Here, patterned Ge filters were integrated with InGaAs/GaAs quantum dot detectors to linearly tune their 77 K photoresponse peaks from 5.6 μm to 6.2 μm. The dark current was not influenced by these filters but the ability to narrow the photoresponse linewidth was limited by substrate scattering, which is often encountered with front-side illumination architectures.

KW - Infrared photodetectors

KW - Optical filters

KW - Photonic crystals

KW - Quantum dots

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JO - Physica Status Solidi - Rapid Research Letters

JF - Physica Status Solidi - Rapid Research Letters

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Spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors with bandpass guided-mode resonance filters

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