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Quantum dot rolled-up microtube optoelectronic integrated circuit.
Sishir Bhowmick1, Thomas Frost, Pallab Bhattacharya
1Center for Nanoscale Photonics and Spintronics, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA.
Optics Letters
|August 14, 2013
Summary
A novel rolled-up microtube optoelectronic integrated circuit functions as a phototransceiver. This device integrates a microtube laser and detector, demonstrating potential for advanced optical communication systems.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Optoelectronic integrated circuits are crucial for optical communication.
- Developing compact and efficient phototransceivers remains a key challenge.
- Rolled-up microtubes offer a unique platform for miniaturized optoelectronic devices.
Purpose of the Study:
- To demonstrate a novel rolled-up microtube optoelectronic integrated circuit.
- To integrate a microtube laser and a microtube photoconductive detector into a single device.
- To characterize the performance of the integrated phototransceiver.
Main Methods:
- Fabrication of a rolled-up microtube using an InGaAs/GaAs strained bilayer with InAs quantum dots.
- Integration of an optically pumped microtube laser and a microtube photoconductive detector.
- Connection of the laser and detector using an amorphous silicon/silicon dioxide (a-Si/SiO2) waveguide.
- Measurement of waveguide loss and phototransceiver responsivity.
Main Results:
- Successful demonstration of a functional rolled-up microtube phototransceiver.
- Waveguide loss measured at 7.96 dB/cm.
- Overall phototransceiver responsivity achieved at 34 mA/W.
Conclusions:
- The rolled-up microtube platform is suitable for optoelectronic integration.
- The demonstrated phototransceiver shows promising performance for miniaturized optical systems.
- Further optimization could enhance the efficiency and applicability of these devices.
