Low-loss suspended quantum well waveguides.
We have used surface micromachining to fabricate suspended InGaAs/InGaAsP quantum well waveguides that are supported by lateral tethers. The average measured TE propagation loss in our samples is 4.1 dB/cm, and the average measured TE loss per tether pair is 0.21 dB. These measurements are performed at wavelengths in the optical L-band, just 125 nm below the quantum well band gap.
Naval Research Laboratory, Washington, DC 20375, USA. stievater@nrl.navy.mil
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Stievater
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Rabinovich
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Park
J B
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Khurgin
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Kanakaraju
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Richardson