Authors

P. T. Lin; V. Singh; J. F. Wang; H. T. Lin; J. J. Hu; K. Richardson; J. D. Musgraves; I. Luzinov; J. Hensley; L. C. Kimerling;A. Agarwal

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Abbreviated Journal Title

Opt. Mater. Express

Keywords

WAVE INFRARED REGION; SILICON; GUIDES; CHIP; PHOTOCONDUCTIVITY; DETECTORS; SENSORS; Materials Science, Multidisciplinary; Optics

Abstract

CMOS compatible mid-Infrared (mid-IR) microphotonics including (1) broadband SOUP (Silicon on Oxide Undercladding Pedestal) waveguides; and (2) mid-IR transparent chalcogenide glass (ChGs) waveguides monolithically integrated with a PbTe thin film photodetector; are demonstrated. Using a pedestal undercladding geometry we obtain an optical loss for our Si waveguide which is 10 dB/cm lower compared to other waveguides using planar SiO2 cladding at lambda = 5 mu m, and a fundamental mode is seen over a broad mid-IR spectral range. To realize a fully integrated mid-IR on-chip system, in parallel, we develop PbTe thin film detectors that can be deposited on various mid-IR platforms through a thermal evaporation technique, offering high photoresponsivity of 25 V/W from lambda = 1 mu m to 4 mu m. The detector can be efficiently integrated, using a suitable spacer, to an underlying Chalcogenide glass (ChGs) waveguide. Our results of low loss waveguides and integrated thin film detectors enable Si-CMOS microphotonics for mid-IR applications.

Journal Title

Optical Materials Express

Volume

3

Issue/Number

9

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

1474

Last Page

1487

WOS Identifier

WOS:000323944700029

ISSN

2159-3930

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