Polaron effect on the optical rectification in spherical quantum dots with electric field

doi:10.1088/1674-1056/25/10/107804

Abstract The polaron effect on the optical rectification in spherical quantum dots with a shallow hydrogenic impurity in the presence of electric field is theoretically investigated by taking into account the interactions of the electrons with both confined and surface optical phonons. Besides, the interaction between impurity and phonons is also considered. Numerical calculations are presented for typical Zn_1-xCd_xSe/ZnSe material. It is found that the polaronic effect or electric field leads to the redshifted resonant peaks of the optical rectification coefficients. It is also found that the peak values of the optical rectification coefficients with the polaronic effect are larger than without the polaronic effect, especially for smaller Cd concentrations or stronger electric field.

Keywords: polaron effect optical rectification spherical quantum dot

Received: 27 February 2016
Revised: 30 May 2016
Accepted manuscript online:

PACS:	78.67.Hc	(Quantum dots)
	73.21.La	(Quantum dots)
	71.38.-k	(Polarons and electron-phonon interactions)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11364028), the Major Projects of the Natural Science Foundation of Inner Mongolia Autonomous Region, China (Grant No. 2013ZD02), and the Project of “Prairie Excellent” Engineering in Inner Mongolia Autonomous Region, China.

Corresponding Authors: Zu-Wei Yan
E-mail: zwyan101@126.com

Cite this article:

Zhen-Yu Feng(冯振宇), Zu-Wei Yan(闫祖威) Polaron effect on the optical rectification in spherical quantum dots with electric field 2016 Chin. Phys. B 25 107804

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Polaron effect on the optical rectification in spherical quantum dots with electric field

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