T. Arakawa, T. Toya, M. Ushigome, K. Yamaguchi, T. Ide, K. Tada, "InGaAs/InAlAs five-layer
asymmetric coupled quantum well exhibiting giant
electrorefractive index
change," Jpn. J. Appl. Phys. 50, 032204 (2011).

Y. Iseri, T. Arakawa, K. Tada, N. Haneji, "Influence of heterointerface
abruptness on electrorefractive effect in
InGaAs/InAlAs five-layer asymmetric coupled
quantum well," Jpn. J. Appl. Phys. 49, (2010) 4DG04.

Y. Goebuchi, M. Hisada, T. Kato, Y. Kokubun, "Optical cross-connect circuit
using hitless wavelength selective
switch," Opt. Exp. 16, 535-548 (2008).

M. Först, J. Niehusmann, T. Plötzing, J. Bolten, T. Wahlbrink, C. Moormann, H. Kurz, "High-speed all-optical switching
in ion-implanted silicon-on-insulator microring
resonators," Opt. Lett. 32, 2046-2048 (2007).

W.-S. Choi, W. Zhao, J.-W. Bae, I. Adesida, B.-A. Yu, Y. L. Lee, J.-H. Jang, "Micro-racetrack notch filters
based on InGaAsP/InP high mesa optical
waveguides," Jpn. J. Appl. Phys. 46, 2434-2439 (2007).

Y. Kokubun, "High index contrast optical
waveguides and their applications to microring
filter circuit and wavelength selective
switch," IEICE Trans. Electron. E90-C, 1037-1045 (2007).

Y. Kokubun, "Vertically coupled microring
resonator filter for integrated add/drop
node," IEICE Trans. Electron. E-88C, 349-362 (2005).

S. Matsuo, Y. Ohiso, T. Segawa, "A high speed optical tunable
filter using a semiconductor ring resonator for
photonic packet switch," IEICE Trans. Electron. E88-C, 295-301 (2005).

S. Mikroulis, H. Simos, E. Roditi, D. Syvridi, "Ultrafast all-optical AND logic
operation based on four-wave mixing in a passive
InGaAsP-InP microring
resonator," IEEE Photon. Technol.
Lett. 17, 1878-1880 (2005).

Z.-X. Xu, X.-Q. Jiang, Y.-G. Xu, A.-L. Yang, M.-H. Wang, Q. Zhou, X.-H. Li, J.-Y. Yang, "A novel coupled quantum well
structure with low-driving voltage, low
absorption loss and large field-induced
refractive index change," Chinese Phys. Lett. 22, 956-959 (2005).

H. Mohseni, H. An, Z. A. Shellenbarger, M. H. Kwakernaak, J. H. Abeles, "Enhanced electro-optic effect in
GaInAsP-InP three-step quantum
wells," Appl. Phys. Lett. 84, 1823-1825 (2004).

T. Ito, Y. Kokubun, "Nondestructive measurement of
propagation loss and coupling efficiency in
microring resonator filters using filter
responses," Jpn. J. Appl. Phys. 43, 1002-1005 (2004).

K. Tada, T. Arakawa, K. Kazuma, N. Kurosawa, J. H. Noh, "Influence of one monolayer
thickness variation in GaAs/AlGaAs five-layer
asymmetric coupled quantum well upon
electrorefractive index
change," Jpn. J. Appl. Phys. 40, 656-661 (2001).

H. Feng, J. P. Pang, M. Sugiyama, K. Tada, Y. Nakano, "Field-induced optical effect in a
five-step asymmetric coupled quantum well with
modified potential," IEEE J. Quantum
Electron. 34, 1197-1208 (1998).

C. Thirstrup, "Refractive index modulation based
on excitonic effects in GaInAs-InP coupled
asymmetric quantum wells," IEEE J. Quantum
Electron. 31, 988-996 (1995).

N. Susa, "Improvement in electroabsorption
and the effects of parameter variations in the
three-step asymmetric coupled quantum
well," J. Appl. Phys. 73, 932-942 (1993).

N. Susa, T. Nakahara, "Enhancement of change in the
refractive index in an asymmetric quantum
well," Appl. Phys. Lett. 60, 106932-106934 (1992).

S. Nishimura, H. Inoue, H. Sano, K. Ishida, "Electrooptic effects in an
InGaAs/InAlAs multiquantum well
structure," IEEE Photon. Technol.
Lett. 4, 1123-1125 (1992).

S. L. Chuang, "Efficient band-structure
calculations of strained quantum
wells," Phys. Rev. B 43, 9649-9661 (1991).

M. Bugajski, W. Lewandowski, "Concentration-dependent absorption
and photoluminescence of $n$-type InP," J. Appl. Phys. 57, 521-530 (1985).

H. C. Casey, Jr.P. L. Carter, "Variation of intervalence band
absorption with hole concentration in $p$-type InP," Appl. Phys. Lett. 44, 82-83 (1984).

D. S. Chemla, D. A. B. Miller, P. W. Smith, A. C. Gossard, W. Wiegmann, "Room temperature excitonic
nonlinear absorption and refraction in
GaAs/AlGaAs multiple quantum well
structures," IEEE J. Quantum
Electron. QE-20, 265-275 (1984).

N. Susa, T. Nakahara, "Enhancement of change in the
refractive index in an asymmetric quantum
well," Appl. Phys. Lett. 60, 106932-106934 (1992).

H. Mohseni, H. An, Z. A. Shellenbarger, M. H. Kwakernaak, J. H. Abeles, "Enhanced electro-optic effect in
GaInAsP-InP three-step quantum
wells," Appl. Phys. Lett. 84, 1823-1825 (2004).

H. C. Casey, Jr.P. L. Carter, "Variation of intervalence band
absorption with hole concentration in $p$-type InP," Appl. Phys. Lett. 44, 82-83 (1984).

Z.-X. Xu, X.-Q. Jiang, Y.-G. Xu, A.-L. Yang, M.-H. Wang, Q. Zhou, X.-H. Li, J.-Y. Yang, "A novel coupled quantum well
structure with low-driving voltage, low
absorption loss and large field-induced
refractive index change," Chinese Phys. Lett. 22, 956-959 (2005).

H. Feng, J. P. Pang, M. Sugiyama, K. Tada, Y. Nakano, "Field-induced optical effect in a
five-step asymmetric coupled quantum well with
modified potential," IEEE J. Quantum
Electron. 34, 1197-1208 (1998).

D. S. Chemla, D. A. B. Miller, P. W. Smith, A. C. Gossard, W. Wiegmann, "Room temperature excitonic
nonlinear absorption and refraction in
GaAs/AlGaAs multiple quantum well
structures," IEEE J. Quantum
Electron. QE-20, 265-275 (1984).

C. Thirstrup, "Refractive index modulation based
on excitonic effects in GaInAs-InP coupled
asymmetric quantum wells," IEEE J. Quantum
Electron. 31, 988-996 (1995).

S. Mikroulis, H. Simos, E. Roditi, D. Syvridi, "Ultrafast all-optical AND logic
operation based on four-wave mixing in a passive
InGaAsP-InP microring
resonator," IEEE Photon. Technol.
Lett. 17, 1878-1880 (2005).

S. Nishimura, H. Inoue, H. Sano, K. Ishida, "Electrooptic effects in an
InGaAs/InAlAs multiquantum well
structure," IEEE Photon. Technol.
Lett. 4, 1123-1125 (1992).

Y. Kokubun, "High index contrast optical
waveguides and their applications to microring
filter circuit and wavelength selective
switch," IEICE Trans. Electron. E90-C, 1037-1045 (2007).

Y. Kokubun, "Vertically coupled microring
resonator filter for integrated add/drop
node," IEICE Trans. Electron. E-88C, 349-362 (2005).

S. Matsuo, Y. Ohiso, T. Segawa, "A high speed optical tunable
filter using a semiconductor ring resonator for
photonic packet switch," IEICE Trans. Electron. E88-C, 295-301 (2005).

N. Susa, "Improvement in electroabsorption
and the effects of parameter variations in the
three-step asymmetric coupled quantum
well," J. Appl. Phys. 73, 932-942 (1993).

M. Bugajski, W. Lewandowski, "Concentration-dependent absorption
and photoluminescence of $n$-type InP," J. Appl. Phys. 57, 521-530 (1985).

T. Ito, Y. Kokubun, "Nondestructive measurement of
propagation loss and coupling efficiency in
microring resonator filters using filter
responses," Jpn. J. Appl. Phys. 43, 1002-1005 (2004).

K. Tada, T. Arakawa, K. Kazuma, N. Kurosawa, J. H. Noh, "Influence of one monolayer
thickness variation in GaAs/AlGaAs five-layer
asymmetric coupled quantum well upon
electrorefractive index
change," Jpn. J. Appl. Phys. 40, 656-661 (2001).

Y. Iseri, T. Arakawa, K. Tada, N. Haneji, "Influence of heterointerface
abruptness on electrorefractive effect in
InGaAs/InAlAs five-layer asymmetric coupled
quantum well," Jpn. J. Appl. Phys. 49, (2010) 4DG04.

T. Arakawa, T. Toya, M. Ushigome, K. Yamaguchi, T. Ide, K. Tada, "InGaAs/InAlAs five-layer
asymmetric coupled quantum well exhibiting giant
electrorefractive index
change," Jpn. J. Appl. Phys. 50, 032204 (2011).

W.-S. Choi, W. Zhao, J.-W. Bae, I. Adesida, B.-A. Yu, Y. L. Lee, J.-H. Jang, "Micro-racetrack notch filters
based on InGaAsP/InP high mesa optical
waveguides," Jpn. J. Appl. Phys. 46, 2434-2439 (2007).

Y. Goebuchi, M. Hisada, T. Kato, Y. Kokubun, "Optical cross-connect circuit
using hitless wavelength selective
switch," Opt. Exp. 16, 535-548 (2008).

S. L. Chuang, "Efficient band-structure
calculations of strained quantum
wells," Phys. Rev. B 43, 9649-9661 (1991).

M. Ushigome, M. Fukuoka, T. Arakawa, K. Tada, "Low voltage Mach–Zehnder
modulator with InGaAs/InAlAs five layer
asymmetric coupled quantum
wells," 22nd Annu. Meet. IEEE Photon.
Soc. (2009) pp. 434-435.

M. Born, E. Wolf, Principles of Optics (Cambridge Univ. Press, 1999) pp. 838.

M. A. Popović, T. Barwicz, M. S. Dahlem, F. Gan, C. W. Holzwarth, P. T. Rakich, "Tunable, fourth-order silicon
microring-resonator add-drop
filters," presented at the 33rd Eur. Conf. Opt.
Commun. BerlinGermany (2007) Paper no. 1.2.3, B.

M. Hamacher, H. Heidrich, D. G. Rabus, U. Troppenz, "InP-based high index waveguides on
GaInAsP/InP for applications in active/passive
ring resonators," Proc. Int. Soc. Opt.
Eng. (2002) pp. 37-45.

A. Kaplan, A. Greenblatt, G. Harston, P. S. Cho, Y. Achiam, I. Shpantzer, "Tunable frequency comb generator
based on LiNbO_{3} ring resonator," presented at the Coherent Opt.
Technol. Appl. WhistlerCanada (2006) Paper no. CFC3.