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Optical matching layer structures in evanescent coupling photodiodes at a wavelength of 1.55 ?m: physics, design and simulation.
- Source :
-
Chinese Physics B . Jan2009, Vol. 18 Issue 1, p225-230. 6p. - Publication Year :
- 2009
-
Abstract
- We have studied the optical matching layers (OMLs) and external quantum efficiency in the evanescent coupling photodiodes (ECPDs) integrating a diluted waveguide as a fibre-to-waveguide coupler, by using the semi-vectorial beam propagation method (BPM). The physical basis of OML has been identified, thereby a general designing rule of OML is developed in such a kind of photodiode. In addition, the external quantum efficiency and the polarization sensitivity versus the absorption and coupling length are analysed. With an optical matching layer, the absorption medium with a length of 30 mm could absorb 90% of the incident light at 1.55 mm wavelength, thus the total absorption increases more than 7 times over that of the photodiode without any optical matching layer. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16741056
- Volume :
- 18
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Chinese Physics B
- Publication Type :
- Academic Journal
- Accession number :
- 36169443
- Full Text :
- https://doi.org/10.1088/1674-1056/18/1/037