Abstract
The resonant modes found in a modified single-defect two-dimensional photonic crystal slab structure are theoretically and experimentally studied. There exist several modes in the band gap: doubly degenerate (dipole and quadrupole modes) and nondegenerate (hexapole and monopole modes). Among them, the monopole mode specifically attracts our interest because of its nondegeneracy, good coupling with the gain medium, and existence of the intensity minimum at the center of the cavity, which would open up the chance for the electrically driven single-defect laser. The nondegenerate hexapole mode, a special type of whispering gallery mode, has a very high quality factor. We have fabricated two types of modified single-defect lasers, i.e., air-based free-standing and SiO2-based epoxy-bonded structures. Rich lasing actions in both structures are experimentally observed under optically pulsed pumping conditions at room temperature. In the free-standing slab structure, photons are strongly confined in vertical direction, and the lasing operations of all resonant modes with low thresholds are obtained. Especially, the nondegenerate monopole-mode laser is confirmed to have a large spontaneous emission factor of >0.06, estimated by analyzing rate equations. In the SiO2-based slab structure, thermal properties are improved at the expense of vertical losses.
Original language | English |
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Pages (from-to) | 1353-1365 |
Number of pages | 13 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 38 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2002 Oct |
Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received March 18, 2002; revised July 8, 2002. This work was supported by the National Research Laboratory Project of Korea and the NICOP program of the Office of Naval Research. H.-G. Park, J. Huh, H.-Y. Ryu, S.-H. Kim, J.-S. Kim, and Y.-H. Lee are with the Department of Physics, Korea Advanced Institute of Science and Technology, Taejon, Korea. J.-K. Hwang is with the Networking Solution Division, Agilent Technologies, San Jose, CA 95131 USA. Publisher Item Identifier 10.1109/JQE.2002.802951.
Keywords
- FDTD
- InGaAsP-InP
- Microcavity
- Photonic band gap
- Semiconductor laser
- Spontaneous emission factor
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering