Ultraviolet stimulated emission in periodically polarity-inverted ZnO structures at room temperature

Jinsub Park; Takenari Goto; Sung Hyun Park; Jun Seok Ha; Euijoon Yoon; Takafumi Yao

doi:10.1063/1.3503605

Ultraviolet stimulated emission in periodically polarity-inverted ZnO structures at room temperature

Jinsub Park, Takenari Goto, Sung Hyun Park, Jun Seok Ha, Euijoon Yoon, Takafumi Yao

Mechanical Engineering

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Abstract

The photoluminescence and stimulated emission characteristics of two types of periodically polarity-inverted ZnO grating structures have been investigated in detail. Strong photoluminescence in the step regions is observed for all the samples. However, electron-hole plasma emission is observed only for one type of sample consisting of Zn-polar ZnO/CrN and O-polar ZnO/Cr₂ O ₃ layers. Moreover, strong stimulated emission occurs only in the Zn-polar layers. These optical phenomena have been discussed in terms of the diffusion of excitons and local crystal quality.

Original language	English (US)
Article number	171101
Journal	Applied Physics Letters
Volume	97
Issue number	17
DOIs	https://doi.org/10.1063/1.3503605
State	Published - Oct 25 2010

Bibliographical note

Funding Information:
This research was supported by WCU (World Class University) Program through National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (Grant No. R31-2008-000-10075-0).

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title = "Ultraviolet stimulated emission in periodically polarity-inverted ZnO structures at room temperature",

abstract = "The photoluminescence and stimulated emission characteristics of two types of periodically polarity-inverted ZnO grating structures have been investigated in detail. Strong photoluminescence in the step regions is observed for all the samples. However, electron-hole plasma emission is observed only for one type of sample consisting of Zn-polar ZnO/CrN and O-polar ZnO/Cr2 O 3 layers. Moreover, strong stimulated emission occurs only in the Zn-polar layers. These optical phenomena have been discussed in terms of the diffusion of excitons and local crystal quality.",

author = "Jinsub Park and Takenari Goto and Park, {Sung Hyun} and Ha, {Jun Seok} and Euijoon Yoon and Takafumi Yao",

note = "Funding Information: This research was supported by WCU (World Class University) Program through National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (Grant No. R31-2008-000-10075-0).",

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AU - Park, Jinsub

AU - Goto, Takenari

AU - Park, Sung Hyun

AU - Ha, Jun Seok

AU - Yoon, Euijoon

AU - Yao, Takafumi

N1 - Funding Information: This research was supported by WCU (World Class University) Program through National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (Grant No. R31-2008-000-10075-0).

PY - 2010/10/25

Y1 - 2010/10/25

N2 - The photoluminescence and stimulated emission characteristics of two types of periodically polarity-inverted ZnO grating structures have been investigated in detail. Strong photoluminescence in the step regions is observed for all the samples. However, electron-hole plasma emission is observed only for one type of sample consisting of Zn-polar ZnO/CrN and O-polar ZnO/Cr2 O 3 layers. Moreover, strong stimulated emission occurs only in the Zn-polar layers. These optical phenomena have been discussed in terms of the diffusion of excitons and local crystal quality.

AB - The photoluminescence and stimulated emission characteristics of two types of periodically polarity-inverted ZnO grating structures have been investigated in detail. Strong photoluminescence in the step regions is observed for all the samples. However, electron-hole plasma emission is observed only for one type of sample consisting of Zn-polar ZnO/CrN and O-polar ZnO/Cr2 O 3 layers. Moreover, strong stimulated emission occurs only in the Zn-polar layers. These optical phenomena have been discussed in terms of the diffusion of excitons and local crystal quality.

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Ultraviolet stimulated emission in periodically polarity-inverted ZnO structures at room temperature

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