Lasing in electrodeposited ZnO inverse opal

L. K. Teh; C. C. Wong; H. Y. Yang; Shu Ping Lau; Siu Fung Yu

doi:10.1063/1.2801358

Lasing in electrodeposited ZnO inverse opal

L. K. Teh, C. C. Wong, H. Y. Yang, Shu Ping Lau, Siu Fung Yu

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

We report room-temperature ultraviolet lasing in ZnO inverse opals fabricated via colloidal templating with electrochemical infiltration. Lasing occurs above an excitation threshold of 0.38 MW cm2. Lasing modes associated with radiative recombinations of exciton-exciton (ex-ex) and electron-hole plasma (EHP) were discerned. Compared to ZnO polycrystalline film, lasing wavelength blueshifts and ex-ex lasing with a narrower bandwidth have been realized. Tuning the primary photonic pseudogap of inverse opals to gain maximum reduces the threshold for EHP lasing. We infer that periodic structures facilitate strain-induced change in lasing energy and provide modulation in refractive index for enhanced light confinement as well as optical feedback.

Original language	English
Article number	161116
Journal	Applied Physics Letters
Volume	91
Issue number	16
DOIs	https://doi.org/10.1063/1.2801358
Publication status	Published - 31 Oct 2007
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2801358

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title = "Lasing in electrodeposited ZnO inverse opal",

abstract = "We report room-temperature ultraviolet lasing in ZnO inverse opals fabricated via colloidal templating with electrochemical infiltration. Lasing occurs above an excitation threshold of 0.38 MW cm2. Lasing modes associated with radiative recombinations of exciton-exciton (ex-ex) and electron-hole plasma (EHP) were discerned. Compared to ZnO polycrystalline film, lasing wavelength blueshifts and ex-ex lasing with a narrower bandwidth have been realized. Tuning the primary photonic pseudogap of inverse opals to gain maximum reduces the threshold for EHP lasing. We infer that periodic structures facilitate strain-induced change in lasing energy and provide modulation in refractive index for enhanced light confinement as well as optical feedback.",

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T1 - Lasing in electrodeposited ZnO inverse opal

AU - Teh, L. K.

AU - Wong, C. C.

AU - Yang, H. Y.

AU - Lau, Shu Ping

AU - Yu, Siu Fung

PY - 2007/10/31

Y1 - 2007/10/31

N2 - We report room-temperature ultraviolet lasing in ZnO inverse opals fabricated via colloidal templating with electrochemical infiltration. Lasing occurs above an excitation threshold of 0.38 MW cm2. Lasing modes associated with radiative recombinations of exciton-exciton (ex-ex) and electron-hole plasma (EHP) were discerned. Compared to ZnO polycrystalline film, lasing wavelength blueshifts and ex-ex lasing with a narrower bandwidth have been realized. Tuning the primary photonic pseudogap of inverse opals to gain maximum reduces the threshold for EHP lasing. We infer that periodic structures facilitate strain-induced change in lasing energy and provide modulation in refractive index for enhanced light confinement as well as optical feedback.

AB - We report room-temperature ultraviolet lasing in ZnO inverse opals fabricated via colloidal templating with electrochemical infiltration. Lasing occurs above an excitation threshold of 0.38 MW cm2. Lasing modes associated with radiative recombinations of exciton-exciton (ex-ex) and electron-hole plasma (EHP) were discerned. Compared to ZnO polycrystalline film, lasing wavelength blueshifts and ex-ex lasing with a narrower bandwidth have been realized. Tuning the primary photonic pseudogap of inverse opals to gain maximum reduces the threshold for EHP lasing. We infer that periodic structures facilitate strain-induced change in lasing energy and provide modulation in refractive index for enhanced light confinement as well as optical feedback.

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DO - 10.1063/1.2801358

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SN - 0003-6951

VL - 91

JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Lasing in electrodeposited ZnO inverse opal

Abstract

ASJC Scopus subject areas

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