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Design and experimental results of small silicon-based optical modulators

Design and experimental results of small silicon-based optical modulators
Design and experimental results of small silicon-based optical modulators
In silicon based photonic circuits, optical modulation is usually performed via the plasma dispersion effect or via the thermo-optic effect, both of which are relatively slow processes. Until relatively recently, the majority of the work in Silicon-on-Insulator (SOI) was based upon waveguides with cross sectional dimensions of several microns. This limits the speed of devices based on the plasma dispersion effect due to the finite transit time of charge carriers, and on the thermo-optic effect due to the volume of the silicon device. Consequently moving to smaller dimensions will increase device speed, as well as providing other advantages of closer packing density, smaller bend radius, and cost effective fabrication. As a result, the trend in recent years has been a move to smaller waveguides, of the order of 1 micron in cross sectional dimensions. In this paper we discuss both the design of small waveguide modulators (of the order of ~1 micron) together with a presentation of preliminary experimental results. In particular two approaches to modulation are discussed, based on injection of free carriers via a p-i-n device, and via thermal modulation of a ring resonator.
44-55
Png, C.E.
ed888ad9-41f4-4ecb-83f6-c8f7ac652c2f
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Headley, W.
7a9a21d1-2aa7-41fd-af72-3f38b02b1d13
Homewood, K.
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Liu, A.
f339fe0a-fda2-4bff-be98-e6748de0da64
Paniccia, M.
a7828a87-25cc-4038-839d-62aa0aaf31de
Atta, R.
c8044599-306d-44a7-a48e-886e1f7ae45a
Ensell, G.
48fe0996-1c6b-4816-8bd0-0a3234d36ae8
Evans, A.
1cfe5902-0508-4a86-bbe2-72aa3a927f1a
Hak, D.
0cecbbf5-5f6c-493b-b0ce-f42e4534d4ad
Cohen, O.
8d8e57bb-b88f-4745-a64a-7f42e7d8b853
Png, C.E.
ed888ad9-41f4-4ecb-83f6-c8f7ac652c2f
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Headley, W.
7a9a21d1-2aa7-41fd-af72-3f38b02b1d13
Homewood, K.
0de13e59-29e9-4165-8d33-f5c5befab417
Liu, A.
f339fe0a-fda2-4bff-be98-e6748de0da64
Paniccia, M.
a7828a87-25cc-4038-839d-62aa0aaf31de
Atta, R.
c8044599-306d-44a7-a48e-886e1f7ae45a
Ensell, G.
48fe0996-1c6b-4816-8bd0-0a3234d36ae8
Evans, A.
1cfe5902-0508-4a86-bbe2-72aa3a927f1a
Hak, D.
0cecbbf5-5f6c-493b-b0ce-f42e4534d4ad
Cohen, O.
8d8e57bb-b88f-4745-a64a-7f42e7d8b853

Png, C.E., Reed, G.T., Headley, W., Homewood, K., Liu, A., Paniccia, M., Atta, R., Ensell, G., Evans, A., Hak, D. and Cohen, O. (2003) Design and experimental results of small silicon-based optical modulators. SPIE, United States. 24 - 29 Jan 2004. pp. 44-55 . (doi:10.1117/12.529385).

Record type: Conference or Workshop Item (Paper)

Abstract

In silicon based photonic circuits, optical modulation is usually performed via the plasma dispersion effect or via the thermo-optic effect, both of which are relatively slow processes. Until relatively recently, the majority of the work in Silicon-on-Insulator (SOI) was based upon waveguides with cross sectional dimensions of several microns. This limits the speed of devices based on the plasma dispersion effect due to the finite transit time of charge carriers, and on the thermo-optic effect due to the volume of the silicon device. Consequently moving to smaller dimensions will increase device speed, as well as providing other advantages of closer packing density, smaller bend radius, and cost effective fabrication. As a result, the trend in recent years has been a move to smaller waveguides, of the order of 1 micron in cross sectional dimensions. In this paper we discuss both the design of small waveguide modulators (of the order of ~1 micron) together with a presentation of preliminary experimental results. In particular two approaches to modulation are discussed, based on injection of free carriers via a p-i-n device, and via thermal modulation of a ring resonator.

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Published date: 2003
Venue - Dates: SPIE, United States, 2004-01-24 - 2004-01-29
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 260465
URI: https://eprints.soton.ac.uk/id/eprint/260465
PURE UUID: f2d0c654-e51e-44cc-ace7-1644a870dcb5

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Date deposited: 07 Feb 2005
Last modified: 05 Oct 2018 12:11

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Contributors

Author: C.E. Png
Author: G.T. Reed
Author: W. Headley
Author: K. Homewood
Author: A. Liu
Author: M. Paniccia
Author: R. Atta
Author: G. Ensell
Author: A. Evans
Author: D. Hak
Author: O. Cohen

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