Effective photoconductivity of exfoliated black phosphorus for optoelectronic switching under 1.55 μm optical excitation

Effective photoconductivity of exfoliated black phosphorus for optoelectronic switching under 1.55 μm optical excitation

We present a microwave photoconductive switch based on exfoliated black phosphorus and strongly responding to a 1.55 μm optical excitation. According to its number of atomic layers, exfoliated black phosphorus presents unique properties for optoelectronic applications, like a tunable direct bandgap...

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Bibliographic Details
Main Authors: Penillard, A., Tripon-Canseliet, C., Rosticher, M., Maksimovic, I., Liu, Zheng, Géron, E.
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2016
Subjects:
Microwaves
Online Access:https://hdl.handle.net/10356/82386
http://hdl.handle.net/10220/39983
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Institution: Nanyang Technological University
Language: English
Description
Summary:We present a microwave photoconductive switch based on exfoliated black phosphorus and strongly responding to a 1.55 μm optical excitation. According to its number of atomic layers, exfoliated black phosphorus presents unique properties for optoelectronic applications, like a tunable direct bandgap from 0.3 eV to 2 eV, strong mobilities, and strong conductivities. The switch shows a maximum ON/OFF ratio of 17 dB at 1 GHz, and 2.2 dB at 20 GHz under 1.55-μm laser excitation at 50 mW, never achieved with bidimensional materials.

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