Octagonal quasi-photonic crystal single-defect microcavity with whispering gallery mode and condensed device size

Po Tsung Lee; Tsan Wen Lu; Feng Mao Tsai

doi:10.1109/LPT.2007.895054

Octagonal quasi-photonic crystal single-defect microcavity with whispering gallery mode and condensed device size

Po Tsung Lee^*, Tsan Wen Lu, Feng Mao Tsai

^*Corresponding author for this work

Department of Photonics

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

12 Scopus citations

Abstract

We propose a new single-defect microcavity which supports well-confined whispering gallery mode in octagonal quasiphotonic crystals (OQPC) by shifting the eight nearest air holes around the cavity. Lasing action is observed and compared with the calculated results obtained using the finite-difference time-domain method. We also investigate the threshold dependence on the number of lattice periods of this OQPC microcavity and compare it with triangular lattice photonic crystal (PC) microcavity with similar cavity size. The OQPC microcavity exhibits only a 36% increase of threshold when the number of lattice periods decreases from eight to four, which is more advantageous than the triangular lattice PC microcavity for the shrinkage of device size.

Original language	English
Pages (from-to)	710-712
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	19
Issue number	9
DOIs	https://doi.org/10.1109/LPT.2007.895054
State	Published - 1 May 2007

Keywords

Microcavity
Quasi-photonic crystal (QPC)
Semiconductor lasers

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10.1109/LPT.2007.895054

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abstract = "We propose a new single-defect microcavity which supports well-confined whispering gallery mode in octagonal quasiphotonic crystals (OQPC) by shifting the eight nearest air holes around the cavity. Lasing action is observed and compared with the calculated results obtained using the finite-difference time-domain method. We also investigate the threshold dependence on the number of lattice periods of this OQPC microcavity and compare it with triangular lattice photonic crystal (PC) microcavity with similar cavity size. The OQPC microcavity exhibits only a 36% increase of threshold when the number of lattice periods decreases from eight to four, which is more advantageous than the triangular lattice PC microcavity for the shrinkage of device size.",

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AU - Lu, Tsan Wen

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N2 - We propose a new single-defect microcavity which supports well-confined whispering gallery mode in octagonal quasiphotonic crystals (OQPC) by shifting the eight nearest air holes around the cavity. Lasing action is observed and compared with the calculated results obtained using the finite-difference time-domain method. We also investigate the threshold dependence on the number of lattice periods of this OQPC microcavity and compare it with triangular lattice photonic crystal (PC) microcavity with similar cavity size. The OQPC microcavity exhibits only a 36% increase of threshold when the number of lattice periods decreases from eight to four, which is more advantageous than the triangular lattice PC microcavity for the shrinkage of device size.

AB - We propose a new single-defect microcavity which supports well-confined whispering gallery mode in octagonal quasiphotonic crystals (OQPC) by shifting the eight nearest air holes around the cavity. Lasing action is observed and compared with the calculated results obtained using the finite-difference time-domain method. We also investigate the threshold dependence on the number of lattice periods of this OQPC microcavity and compare it with triangular lattice photonic crystal (PC) microcavity with similar cavity size. The OQPC microcavity exhibits only a 36% increase of threshold when the number of lattice periods decreases from eight to four, which is more advantageous than the triangular lattice PC microcavity for the shrinkage of device size.

KW - Microcavity

KW - Quasi-photonic crystal (QPC)

KW - Semiconductor lasers

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Octagonal quasi-photonic crystal single-defect microcavity with whispering gallery mode and condensed device size

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