Abstract
We propose a quantum dot array for enhancing excitonic optical nonlinearity, especially its figures of merit. The most important aspect of the quantum dot array for enhancing optical nonlinearity is the enlarged exciton coherence length due to the exciton transfer among quantum dots via dipole-dipole interaction. The important requisites for the material of the quantum dot array to enhance the figures of merit of the optical nonlinearity are shown to be the large oscillator strength of the excitonic transition and the small exciton Bohr radius. The optical nonlinearity of the quantum dot array is estimated for typical semiconductor materials, and an enhancement factor of the figures of merit is predicted to be several orders of magnitude over the previously known values. The tolerance limits are also discussed for the fluctuation of the quantum dot size and of the lattice constant of the quantum dot array, which would be unavoidable in actual samples.
| Original language | English |
|---|---|
| Pages (from-to) | 545-555 |
| Number of pages | 11 |
| Journal | Optoelectronics - Devices and Technologies |
| Volume | 8 |
| Issue number | 4 |
| Publication status | Published - 1993 Dec |
| Externally published | Yes |
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Enhancement of excitonic optical nonlinearity in a quantum dot array. / Takagahara, Toshihide.
In: Optoelectronics - Devices and Technologies, Vol. 8, No. 4, 12.1993, p. 545-555.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Enhancement of excitonic optical nonlinearity in a quantum dot array
AU - Takagahara, Toshihide
PY - 1993/12
Y1 - 1993/12
N2 - We propose a quantum dot array for enhancing excitonic optical nonlinearity, especially its figures of merit. The most important aspect of the quantum dot array for enhancing optical nonlinearity is the enlarged exciton coherence length due to the exciton transfer among quantum dots via dipole-dipole interaction. The important requisites for the material of the quantum dot array to enhance the figures of merit of the optical nonlinearity are shown to be the large oscillator strength of the excitonic transition and the small exciton Bohr radius. The optical nonlinearity of the quantum dot array is estimated for typical semiconductor materials, and an enhancement factor of the figures of merit is predicted to be several orders of magnitude over the previously known values. The tolerance limits are also discussed for the fluctuation of the quantum dot size and of the lattice constant of the quantum dot array, which would be unavoidable in actual samples.
AB - We propose a quantum dot array for enhancing excitonic optical nonlinearity, especially its figures of merit. The most important aspect of the quantum dot array for enhancing optical nonlinearity is the enlarged exciton coherence length due to the exciton transfer among quantum dots via dipole-dipole interaction. The important requisites for the material of the quantum dot array to enhance the figures of merit of the optical nonlinearity are shown to be the large oscillator strength of the excitonic transition and the small exciton Bohr radius. The optical nonlinearity of the quantum dot array is estimated for typical semiconductor materials, and an enhancement factor of the figures of merit is predicted to be several orders of magnitude over the previously known values. The tolerance limits are also discussed for the fluctuation of the quantum dot size and of the lattice constant of the quantum dot array, which would be unavoidable in actual samples.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027809222&partnerID=8YFLogxK
M3 - Article
VL - 8
SP - 545
EP - 555
JO - Optoelectronics - Devices and Technologies
JF - Optoelectronics - Devices and Technologies
SN - 0912-5434
IS - 4
ER -