Measuring the Optical Absorption of Single Nanowires

Milo Yaro Swinkels; Alessio Campo; Daniel Vakulov; Wonjong Kim; Luca Gagliano; Simon Escobar Steinvall; Hermann Detz; Marta De Luca; Alois Lugstein; Erik Bakkers; Anna Fontcuberta I Morral; Ilaria Zardo

doi:10.1103/PhysRevApplied.14.024045

Measuring the Optical Absorption of Single Nanowires

Milo Yaro Swinkels, Alessio Campo, Daniel Vakulov, Wonjong Kim, Luca Gagliano, Simon Escobar Steinvall, Hermann Detz, Marta De Luca, Alois Lugstein, Erik Bakkers, Anna Fontcuberta I Morral, Ilaria Zardo (Corresponding author)

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Abstract

In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.

Original language	English
Article number	024045
Number of pages	10
Journal	Physical Review Applied
Volume	14
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevApplied.14.024045
Publication status	Published - 17 Aug 2020

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title = "Measuring the Optical Absorption of Single Nanowires",

abstract = "In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.",

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AU - Swinkels, Milo Yaro

AU - Campo, Alessio

AU - Vakulov, Daniel

AU - Kim, Wonjong

AU - Gagliano, Luca

AU - Steinvall, Simon Escobar

AU - Detz, Hermann

AU - De Luca, Marta

AU - Lugstein, Alois

AU - Bakkers, Erik

AU - Fontcuberta I Morral, Anna

AU - Zardo, Ilaria

PY - 2020/8/17

Y1 - 2020/8/17

N2 - In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.

AB - In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.

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Measuring the Optical Absorption of Single Nanowires

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