Abstract
We investigate the polarization of emission from pairs of coupled whispering-gallery-mode semiconductor microdisks. The finite-difference time-domain method is used to carry out an electromagnetic field profile analysis of four classes of bonding and antibonding modes. For coupled circular microdisks, our simulations predict distinct in-plane polarization directions for the bonding and antibonding modes, in agreement with experimental measurements. For pairs of elliptical microdisks coupled along either the major or the minor axes, our simulations do not predict any polarized emission. Experimental measurements of elliptical microdisks coupled along the minor axis appear to be consistent with these predictions, with no preferred polarization direction for the bonding and antibonding modes. However, elliptical microdisks coupled along the major axis often show a preferred polarization at 45° to the major axis, inconsistent with both the simulations and with simple symmetry considerations. This suggests that the polarization characteristics of the emission in elliptical geometries may be very sensitive to extrinsic symmetry-breaking factors such as patterning imperfections.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 932-936 |
| Number of pages | 5 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 45 |
| Issue number | 8 |
| DOIs | |
| State | Published - Dec 1 2009 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering
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Polarized emission from twin microdisk photonic molecules. / Li, Xia; Myers, Roberto C.; Mendoza, Felix M.; Awschalom, David D.; Samarth, Nitin.
In: IEEE Journal of Quantum Electronics, Vol. 45, No. 8, 01.12.2009, p. 932-936.Research output: Contribution to journal › Article
TY - JOUR
T1 - Polarized emission from twin microdisk photonic molecules
AU - Li, Xia
AU - Myers, Roberto C.
AU - Mendoza, Felix M.
AU - Awschalom, David D.
AU - Samarth, Nitin
PY - 2009/12/1
Y1 - 2009/12/1
N2 - We investigate the polarization of emission from pairs of coupled whispering-gallery-mode semiconductor microdisks. The finite-difference time-domain method is used to carry out an electromagnetic field profile analysis of four classes of bonding and antibonding modes. For coupled circular microdisks, our simulations predict distinct in-plane polarization directions for the bonding and antibonding modes, in agreement with experimental measurements. For pairs of elliptical microdisks coupled along either the major or the minor axes, our simulations do not predict any polarized emission. Experimental measurements of elliptical microdisks coupled along the minor axis appear to be consistent with these predictions, with no preferred polarization direction for the bonding and antibonding modes. However, elliptical microdisks coupled along the major axis often show a preferred polarization at 45° to the major axis, inconsistent with both the simulations and with simple symmetry considerations. This suggests that the polarization characteristics of the emission in elliptical geometries may be very sensitive to extrinsic symmetry-breaking factors such as patterning imperfections.
AB - We investigate the polarization of emission from pairs of coupled whispering-gallery-mode semiconductor microdisks. The finite-difference time-domain method is used to carry out an electromagnetic field profile analysis of four classes of bonding and antibonding modes. For coupled circular microdisks, our simulations predict distinct in-plane polarization directions for the bonding and antibonding modes, in agreement with experimental measurements. For pairs of elliptical microdisks coupled along either the major or the minor axes, our simulations do not predict any polarized emission. Experimental measurements of elliptical microdisks coupled along the minor axis appear to be consistent with these predictions, with no preferred polarization direction for the bonding and antibonding modes. However, elliptical microdisks coupled along the major axis often show a preferred polarization at 45° to the major axis, inconsistent with both the simulations and with simple symmetry considerations. This suggests that the polarization characteristics of the emission in elliptical geometries may be very sensitive to extrinsic symmetry-breaking factors such as patterning imperfections.
UR - http://www.scopus.com/inward/record.url?scp=77949988852&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77949988852&partnerID=8YFLogxK
U2 - 10.1109/JQE.2009.2015893
DO - 10.1109/JQE.2009.2015893
M3 - Article
AN - SCOPUS:77949988852
VL - 45
SP - 932
EP - 936
JO - IEEE Journal of Quantum Electronics
JF - IEEE Journal of Quantum Electronics
SN - 0018-9197
IS - 8
ER -