Polarization-Independent Optical Waveguide Switch with Parabolic Potential Quantum Well,
TOKYO UNIV (JAPAN)
Pagination or Media Count:
In a parabolic quantum well, the shift in the optical transition energy due to the quantum confined Stark effect is independent of the carrier effective mass. This fact enables us to realize polarization-independent waveguide optical switches. An absorption-type switch with GaAsAlo.3Ga.0.7As equivalent parabolic quantum wells is fabricated with molecular beam epitaxy. Both transverse-electric and transverse-magnetic mode fights exhibit an onoff ratio of lO dB at an applied voltage of 3.5V at 844nm wavelength. To our knowledge, this is the first polarization-independent waveguide optical switch based on the electric-field-induced effect in the semiconductor quantum well.
- Electrooptical and Optoelectronic Devices