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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 3 — Feb. 2, 2009
  • pp: 1299–1307
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Modulation instability in nonlinear coupled resonator optical waveguides and photonic crystal waveguides

Chih-Hsien Huang, Ying-Hsiuan Lai, Szu-Cheng Cheng, and Wen-Feng Hsieh  »View Author Affiliations


Optics Express, Vol. 17, Issue 3, pp. 1299-1307 (2009)
http://dx.doi.org/10.1364/OE.17.001299


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Abstract

Modulation instability (MI) in a coupled resonator optical waveguide (CROW) and photonic-crystal waveguide (PCW) with nonlinear Kerr media was studied by using the tight-binding theory. By considering the coupling between the defects, we obtained a discrete nonlinear evolution equation and termed it the extended discrete nonlinear Schrödinger (EDNLS) equation. By solving this equation for CROWs and PCWs, we obtained the MI region and the MI gains, G(p,q), for different wavevectors of the incident plane wave (p) and perturbation (q) analytically. In CROWs, the MI region, in which solitons can be formed, can only occur for pa being located either before or after π/2, where a is the separation of the cavities. The location of the MI region is determined by the number of the separation rods between defects and the sign of the Kerr coefficient. However, in the PCWs, pa in the MI region can exceed the π/2. For those wavevectors close to π/2, the MI profile, G(q), can possess two gain maxima at fixed pa. It is quite different from the results of the nonlinear CROWs and optical fibers. By numerically solving the EDNLS equation using the 4th order Runge-Kutta method to observe exponential growth of small perturbation in the MI region, we found it is consistent with our analytic solutions.

© 2009 Optical Society of America

1. Introduction

Photonic crystals (PCs) are artificial structures in which the refractive index is periodically distributed at a length scale comparable to the operating wavelength [1

1. E. Yablonovitch, “Photonic band-gap crystals,” J. Phys. Condens. Matter 5, 2443–2460 (1993). [CrossRef]

, 2

2. E. Yablonovitch, “Photonic band-gap structures,” J. Opt. Soc. Am. B 10, 283–295 (1993). [CrossRef]

]. A photonic crystal waveguide (PCW) can be created by sequentially changing the radii or dielectric constant of the dielectric rods or changing the radii of periodic air holes in a dielectric slab; on the other hand, the coupled resonator optical waveguide (CROW) is created by arranging the cavities, made of point defects, periodically. The electromagnetic (EM) wave can propagate in these channels, PCWs or CROWs, with a very low loss even through a sharp bend [3-5

3. D. W. Prather, S. Y. Shi, J. Murakowski, G. J. Schneider, A. Sharkawy, C. H. Chen, and B. L. Miao, “Photonic crystal structures and applications: Perspective, overview, and development,“ IEEE J. Sel. Top. Quantum Electron. 12, 1416–1437 (2006). [CrossRef]

]. However, a pulse experiences serious dispersion in the PCWs and CROWs [6

6. A. Imhof, W. L. Vos, R. Sprik, and A. Lagendijk, “Large dispersive effects near the band edges of photonic crystals,” Phys. Rev. Lett. 83, 2942–2945 (1999). [CrossRef]

, 7

7. W. J. Kim, W. Kuang, and J. D. O’Brien, ”Dispersion characteristics of photonic crystal coupled resonator optical waveguides,“ Opt. Express 11, 3431–3437 (2003). [CrossRef] [PubMed]

]; therefore, it would hardly propagate within the waveguides without broadening. There are two ideas to improve the situation of allowing the pulse propagation in the waveguides without broadening. The first method is to design a proper structure to create a linear dispersion curve in the range of operating frequency; the second method is to add nonlinear Kerr media to provide solitons propagation [8-11

8. S. F. Mingaleev, Y. S. Kivshar, and R. A. Sammut, “Long-range interaction and nonlinear localized modes in photonic crystal waveguides,” Phys. Rev. E 62, 5777–5782 (2000). [CrossRef]

]. However, in the latter case, the criteria of forming a soliton is that the wavevector of the incident wave must be located within the modulation instability (MI) regions [12-14

12. A. G. Shagalov, “Modulational instability of nonlinear waves in the range of zero dispersion,” Physics Lett. A 239, 41–45 (1998). [CrossRef]

], where the MI refers to a process in which small perturbations upon a uniform intensity beam would grow exponentially [14

14. F. K. Abdullaev, A. Bouketir, A. Messikh, and B. A. Umarov, “Modulational instability and discrete breathers in the discrete cubic-quintic nonlinear Schrodinger equation,” Physica D-Nonlinear Phenomena 232, 54–61 (2007). [CrossRef]

]. This phenomenon, which is commonly observed in nonlinear optical fibers [15

15. F. M. Mitschke and L. F. Mollenauer, “Discovery of the soliton self-frequency shift,” Opt. Lett. 11, 659–661 (1986). [CrossRef] [PubMed]

], will also occur in the nonlinear PCWs and CROWs.

In this paper, we first use the TBT to describe the EDNLS equation. By considering a small perturbation superimposed on the plane wave solution, the gain of the perturbation which causes the MI can also be derived. Second, by evaluating the coupling coefficients, we shall discuss the regions and gain coefficients of MI in both CROWs and PCWs. In order to verify the correctness of our equations, a CROW and a PCW with square lattices were proposed to calculate the gain coefficients by using the forth-order Runge-Kutta scheme. The simulated results coincide with our analytic analyses.

2. Theory

We consider an optical waveguide which consists of a periodic sequence of identical single-mode defects in the PCs with lattice constant aL. The distance between successive defect points or cavities is a, and the Kerr media, in which the refraction index is proportional to the intensity of the incident wave, is put in the defect region, shown in Fig. 1. Assuming the isolated point defect is a single mode with eigenfrequency of ω0, we can express the mode fields of each point defect as E(r,t) = E 0(r)exp(-iω0t) and H(r,t) = H 0(r)exp(-iω0t). The electric field E0(r,t) and magnetic field H0(r,t) of the waveguide can be expressed as a superposition of the bound states, i.e., E0(r,t) = ∑bm(t)E 0m and H0(r,t) = ∑bm(t)H 0m, where E 0m = E 0(r-ma) and H 0m = H 0(r-ma).

Fig. 1. The structures of (a) a PCW, (b) a CROW with one separation rod and (c) a CROW with two separation rods, where a is the length of successive defect points and aL is the lattice constant of a PC.

idbndt+(ω0+c0)bn+c1(bn+1+bn1)+c2(bn+2+bn2)+γbn2bn=0.
(1)

Here the linear coupling coefficient cm is defined as [10

10. D. N. Christodoulides and N. K. Efremidis, “Discrete temporal solitons along a chain of nonlinear coupled microcavities embedded in photonic crystals,” Opt. Lett. 27, 568–570 (2002). [CrossRef]

]

cm=ω0∫∫∫ΔεE0nE0n+m∫∫∫(μ0H0n2+εE0n2),
(2)

with Δε(r) = ε′(r) − ε(r) being the difference of dielectric constants of the waveguide (ε′(r)) and the point-defected PC (ε(r)) and c0 representing a small shift in the eigenfrequency ω0 that arises from present of the neighbor defects or cavities. The self-phase modulation strength γ is given by

γ=2n0n2ε0ω0∫∫∫E0n4∫∫∫(μ0H0n2+εE0n2),
(3)

with n2 being the Kerr coefficient. Let the plane wave with amplitude ϕ0, propagation wavevector p, and frequency ω in site n as bn = ϕ0 exp(inpa-iωt) be the solution of Eq. (1). The dispersion relation of the nonlinear PCW can be derived as

ω(pa)=ω0c02c1cos(pa)2c2cos(2pa)γϕ02.
(4)

Considering a small perturbation v n(t) superimposed on a plane wave, shown as [14

14. F. K. Abdullaev, A. Bouketir, A. Messikh, and B. A. Umarov, “Modulational instability and discrete breathers in the discrete cubic-quintic nonlinear Schrodinger equation,” Physica D-Nonlinear Phenomena 232, 54–61 (2007). [CrossRef]

]

bn=(ϕ0+νn(t))ei(pnaωt),
(5)

we can substitute Eq. (5) into Eq. (1) to get

idνndt+c1(vn+1eipa+vn1eipa2cos(pa)vn)+
c2(vn+2eipa+vn2eipa2cos(2pa)vn)+γϕ02(vn+vn*)=0.
(6)

Taking v n(t) as this form [14

14. F. K. Abdullaev, A. Bouketir, A. Messikh, and B. A. Umarov, “Modulational instability and discrete breathers in the discrete cubic-quintic nonlinear Schrodinger equation,” Physica D-Nonlinear Phenomena 232, 54–61 (2007). [CrossRef]

]

vn(t)=(V1eiqna+V2*eiqna)eiΩt,
(7)

where q and Ω are the wavevector and frequency of the modulation perturbation. V1 and V2 * represent small perturbation with perturbation wavevectors of q and - q. Substituting vn(t) into Eq.(6), we osbtioned the dispersion relation of the perturbation:

Ωpq=B±A(Aγϕ02).
(8)

Gpq=2*Im(Ωpq)=Re(2·A(γϕ02A)12)=2·Re(A0.5γϕ02)2+0.25γ2ϕ04.
(9)
Fig. 2. (a) The electric field distribution (Ez) of point defect mode simulated by the plane wave expansion method in the square lattice with the dielectric constant, radii of dielectric rods and the radius (rd) of the defect rods being 12, 0.2aL and 0.05aL for frequency f = 0.364 c/aL. (b) The field distribution of the red dash line in (a).

3. Analyses and discussion

In this section, we will further discuss about the MI regions and gains in both CROWs and PCWs made of point defects, shown in Fig. 1. The electric field distribution (Ez) of a single point defect, simulated by the plane wave expansion method in the square lattice with the dielectric constant, radii of dielectric rods and the radius (rd) of the defect rods being 12, 0.2aL and 0.05aL for frequency f = 0.364 c/aL is shown in Fig. 2. And the field profile along the red dash line in Fig. 2(a) is plotted in Fig. 2(b), it has the opposite sign when it extends to the nearest-neighbor defects for the PCW (E 0(0,0)* E 0(aL,0) < 0) and the CROW (E 0(0,0)* E 0(3aL,0) < 0) with even (2) separation rods. To maintain a single mode propagating in the waveguides, the radii or the refraction index of the rods in the waveguides is reduced therefore Δε is negative in the following discussion. Since the electric field is mainly localized around the dielectric rods of the waveguides, we can use the maximum values to replace the integral values for a simple estimation in Eq. (2). Therefore, c1 is positive in even-separated-rod CROWs [16

16. T. Kamalakis and T. Sphicopoulos, “Analytical expressions for the resonant frequencies and modal fields of finite coupled optical cavity chains,” IEEE J. Quantum Electron. 41, 1419–1425 (2005). [CrossRef]

]. However, c2 would be two orders of magnitude smaller than c1 so that we considered only the nearest-neighbor coupling in the CROWs and let c2 ≈ 0 [10

10. D. N. Christodoulides and N. K. Efremidis, “Discrete temporal solitons along a chain of nonlinear coupled microcavities embedded in photonic crystals,” Opt. Lett. 27, 568–570 (2002). [CrossRef]

, 18

18. F. S. S. Chien, J. B. Tu, W. F. Hsieh, and S. C. Cheng, “Tight-binding theory for coupled photonic crystal waveguides,” Phys. Rev. B 75, 125113 (2007). [CrossRef]

]. On the other hand, E(0,0)* E(2aL,0) is positive in the odd-separation-rod (1) CROWs so c1 would be negative and c2 ≈ 0.

Because of c2 ≈ 0 for the CROWs, the coefficient A can be rewritten as A = 4c 1 cos(pa)sin2 (qa/2), in which the sign of A is determined only by pa and it changes sign at pa = π/2. Here the region of pa (or qa) is defined between 0 and π. For positive (negative) A, γ must also be positive (negative) and γ|ϕ0|2 > A > 0(γ|ϕ0|2 < A < 0) to support MI, which can be easily derived by Eq. (9); in other words, c1cos(pa)γ must be positive in MI region. Therefore, the boundary of MI must be located at pa = π/2. In odd-separation-rod CROWs, c1 is negative, therefore A and γ must be both negative when 0 < pa < π/2 and positive as pa > π/2. However, in even-separation-rod CROWs, c1 is positive, therefore A and γ must be both positive when 0 < pa < π/2 and negative as pa > π/2, shown in Table 1. When the structure of the waveguide (c1) has been chosen, |A| increases if q increases at constant c1 and p. When we plot the gain profile as the graph of G vs. q at a given p and defined the gain maximum as the maximal values in the graph, from Eq. (9), the gain maximum would be located at A = 0.5γ|ϕ0|2 and cut off at A = γ|ϕ0|2 when 4|c 1 cos(pa)|> 0.5 |γ||ϕ 0|2; otherwise, the gain maximum would be located at qa = π.

Table 1. MI regions of CROWs

table-icon
View This Table

In negative (positive) c1 for an odd-separation-rod (even-separation-rod) case, the dispersion relation slop is negative (positive) [19

19. K. Hosomi and T. Katsuyama, “A dispersion compensator using coupled defects in a photonic crystal,” IEEE J. Quantum Electron. 38, 825–829 (2002). [CrossRef]

] and the frequency dispersion D defined as d2ω/dk2 is negative (positive) when pa < π/2 and positive (negative) for pa > π/2 from Eq. (4). Therefore, for negative D (pa < π/2 for the odd-separation-rod case and pa > π/2 for the even-separation-rod case), the negative γ is needed to support MI and positive γ is needed to support MI for positive D. In other words, the MI regions of the CROWs in pa can also be decided by simply considering the parameters of D and γ.

On the other hand, E n E n+1 or E 0(0,0)* E 0(aL,0) < 0 and E n E n+2 > 0 in PCWs with aL = a, therefore, c1 is positive and c2, which cannot be neglected, is negative. First, we consider the positive Kerr media having positive n2 (or γ) so the criterion of the MI is γ|ϕ0|2 > A > 0. From the criterion of A = 4c 1cos(pa)sin2(qa/2) + 4c 2cos(2pa)sin2(qa) > 0, since c2 is an order of magnitude smaller than c1, this criterion can be further reduced to cos(pa) > -4|c2/c1|cos2(qa/2). Under this circumstance, the MI region is determined not only by pa but also by qa, and pa in the MI region can exceed π/2, unlike in CROWs that the MI boundary for pa is located at π/2 and is independent of qa. From the other criterion: γ|ϕ0|2 > A, we found A is dominated by the c1 term as pa is located away from π/2, in this case the MI gain is similar to that in the CROWs with even separation rods. Contrarily, when pa approaches to π/2, the c1 term is almost zero and A becomes dominated by the c2 term. In this case, A would not increase as increasing qa. From Eq. (9), we knew that the maximum of the gain profile, G(q), is located at A = 0.5γ|ϕ0|2 or dA/dq = 0. For the latter case, the peak gain would be smaller than that of the former condition. When 4c2 cos(2pa) < 0.5γ|ϕ0|2, there would be two gain maxima at a fixed pa and the gain maxima is located at A = 0.5γ|ϕ0|2, but there would be only one gain maximum located at dA/dq = 0 as 4c2 cos(2pa) < 0.5γ|ϕ0|2.

On the other hand, in the condition of negative γ, the first criterion is cos(pa) < -4|c2/c1|• cos2(qa/2). We found the MI would happen only when pa > π/a. However, when 0 > cos(pa) > -4|c2/c1|, the MI region is located at the higher q rather than the general case in which the perturbation would have gain at qa = 0+. The cutoff gain is also decided by A = γ|ϕ0|2.

4. Simulation results

We consider a square lattice PC with the dielectric constant and radii of the dielectric rods being 12 and 0.2aL, where aL is the lattice constant of the PCs. The radii (rd) of the defect rods are reduced to be 0.05aL and the Kerr media are introduced around the defects between one separation rod to create the CROW and sequentially to create the PCW. The structures and dispersion relations of the CROW and PCW in TM polarization (the electric field parallels the rod axis) without Kerr media are shown in Fig. 3, which are simulated by the plane wave expansion method.

Fig. 3. The dispersion relations of (a) a CROW with one separation rod and (b) a PCW in square lattices, which are simulated by the plane wave expansion method. The dash red lines are the edges of the band gaps.
Fig. 4. (a) The values of A and (b) the gains and regions of the MI of the CROW with γ|ϕ0|2=0.01 (2πc/aL).

First, the properties of the MI in the CROW would be discussed. The coupling coefficient c1 is -0.00841 (2πc/aL), where c is the speed of light in the vacuum. Because c1 is negative, the eigenfrequencies will decrease as increasing k. Figure 4(a) shows A vs. qa with different p. Let A’ be γ|ϕ0|2 - A so that G=2AA. As aforementioned, the MI region is determined by the condition that A lies between 0 and γ|ϕ0|2 and the maximum of G appears when A equals (or is the closest) to 0.5γ|ϕ0|2. Figure 4(b) shows G(p,a) with γ|ϕ0|2=0.01 (2πc/aL). It can be seen that there is no MI gain when pa ≤ 0.5π and only a single gain maximum at given pa in the condition of pa > 0.576π.

In PCWs, the coupling coefficients of c1 and c2 are 0.039 and -0.0047(2πc/a), and ω0-Δω is 0.3632 (2πc/a). The values of A at a given pa were shown in Fig. 5(a). When pa is small, i.e., in [0, 0.4π], A is dominated by c1 term and A increases as qa increases. Due to c1 is positive, the properties of MI would be similar to the CROWs with even separation rods that possesses a single gain maximum as the solid curve in Fig. 6(a) for pa = 0.4π. However, as pa is in (0.4π, 0.6π], A is not simple increasing or decreasing function of qa, shown in Fig. 5(b). At a given pa with positive Kerr media (γ > 0), when the values of A(q) is always smaller than 0.5γ|ϕ0|2, e.g., γ|ϕ0|2 = 0.01 (2πc/a) and pa = 0.6π, there would be a maximal gain as the solid curve in Fig. 6(d). However, when A(q) is larger than 0.5γ|ϕ0|2, e.g., γ|ϕ0|2=0.01 (2πc/a) and pa = 0.49π and 0.55π, there would have 2 gain maxima, solid curves shown in Fig. 6(b) and (c). And the MI region with positive γ can extend to pa = 0.6π, as shown in Fig. 5(c). On the other hand, the MI region with negative Kerr media is shown in Fig. 5(d) which is located within π/2 < pa < π but having the MI region located at high qa as pa close to π/2.

Fig. 5. (a) (b)The values of A in the PCW. The region and gains of MI with (c) positive Kerr media (γ|ϕ0|2=0.01*2πc/a) and (d) negative Kerr media (γ|ϕ0|2=-0.01*2πc/a).

Next, we would use the 4th order Runge-Kutta method to simulate the evolution of the perturbation. A plane wave with 10% initial sinusoidal perturbation is used as the input source in a square-array PCW with γ|ϕ0|2 = 0.01 (2πc/a). The perturbation will grow exponentially in the MI region to become a discrete soliton before it splits, as shown in Fig. 7(a), but the perturbation would never grow outside the MI region in Fig. 7(b). We plot the gain coefficients with square dots in Fig. 6 by evaluating the growing rate by the Runge-Kutta method and then compare with gain profiles (solid curves) calculated by using Eq. (9). The results show a quite good agreement.

Fig. 6. The MI gain profiles gotten by analytic solution and the simulation by 4th order Runge-Kutta method in different qa with γ|ϕ0|2 = 0.01 (2πc/a).
Fig. 7. The evolution of the perturbation in the PCW with (a) pa=0.4π and qa=0.1π (b) pa=0.6π and qa=0.1π.

5. Conclusion

Acknowledgments

The authors would like to thank the National Science Council of the Republic of China for partial financial support under grants NSC96-2628-M-009-001-MY3, NSC96-2112-M-034-002-MY3, and NSC96-2628-E-009-018-MY3. Mr. Chih-Hsien Huang would like to thank NSC for providing fellowship.

References and links

1.

E. Yablonovitch, “Photonic band-gap crystals,” J. Phys. Condens. Matter 5, 2443–2460 (1993). [CrossRef]

2.

E. Yablonovitch, “Photonic band-gap structures,” J. Opt. Soc. Am. B 10, 283–295 (1993). [CrossRef]

3.

D. W. Prather, S. Y. Shi, J. Murakowski, G. J. Schneider, A. Sharkawy, C. H. Chen, and B. L. Miao, “Photonic crystal structures and applications: Perspective, overview, and development,“ IEEE J. Sel. Top. Quantum Electron. 12, 1416–1437 (2006). [CrossRef]

4.

N. Stefanou and A. Modinos, “Impurity bands in photonic insulators,“ Phys. Rev. B 57, 12127–12133 (1998). [CrossRef]

5.

A. Yariv, Y. Xu, R. K. Lee, and A. Scherer, ”Coupled-resonator optical waveguide: a proposal and analysis,“ Opt. Lett. 24, 711–713 (1999). [CrossRef]

6.

A. Imhof, W. L. Vos, R. Sprik, and A. Lagendijk, “Large dispersive effects near the band edges of photonic crystals,” Phys. Rev. Lett. 83, 2942–2945 (1999). [CrossRef]

7.

W. J. Kim, W. Kuang, and J. D. O’Brien, ”Dispersion characteristics of photonic crystal coupled resonator optical waveguides,“ Opt. Express 11, 3431–3437 (2003). [CrossRef] [PubMed]

8.

S. F. Mingaleev, Y. S. Kivshar, and R. A. Sammut, “Long-range interaction and nonlinear localized modes in photonic crystal waveguides,” Phys. Rev. E 62, 5777–5782 (2000). [CrossRef]

9.

S. F. Mingaleev and Y. S. Kivshar, “Self-trapping and stable localized modes in nonlinear photonic crystals,” Phys. Rev. Lett. 86, 5474–5477 (2001). [CrossRef] [PubMed]

10.

D. N. Christodoulides and N. K. Efremidis, “Discrete temporal solitons along a chain of nonlinear coupled microcavities embedded in photonic crystals,” Opt. Lett. 27, 568–570 (2002). [CrossRef]

11.

S. F. Mingaleev, A. E. Miroshnichenko, Y. S. Kivshar, and K. Busch, ”All-optical switching, bistability, and slow-light transmission in photonic crystal waveguide-resonator structures,“ Phys. Rev. E 74, 046603 (2006). [CrossRef]

12.

A. G. Shagalov, “Modulational instability of nonlinear waves in the range of zero dispersion,” Physics Lett. A 239, 41–45 (1998). [CrossRef]

13.

L. Hadzievski, M. Stepic, and M. M. Skoric, “Modulation instability in two-dimensional nonlinear Schrodinger lattice models with dispersion and long-range interactions,” Phys. Rev. B 68, 014305 (2003). [CrossRef]

14.

F. K. Abdullaev, A. Bouketir, A. Messikh, and B. A. Umarov, “Modulational instability and discrete breathers in the discrete cubic-quintic nonlinear Schrodinger equation,” Physica D-Nonlinear Phenomena 232, 54–61 (2007). [CrossRef]

15.

F. M. Mitschke and L. F. Mollenauer, “Discovery of the soliton self-frequency shift,” Opt. Lett. 11, 659–661 (1986). [CrossRef] [PubMed]

16.

T. Kamalakis and T. Sphicopoulos, “Analytical expressions for the resonant frequencies and modal fields of finite coupled optical cavity chains,” IEEE J. Quantum Electron. 41, 1419–1425 (2005). [CrossRef]

17.

S. Mookherjea, “Dispersion characteristics of coupled-resonator optical waveguides,” Opt. Lett. 30, 2406–2408 (2005). [CrossRef] [PubMed]

18.

F. S. S. Chien, J. B. Tu, W. F. Hsieh, and S. C. Cheng, “Tight-binding theory for coupled photonic crystal waveguides,” Phys. Rev. B 75, 125113 (2007). [CrossRef]

19.

K. Hosomi and T. Katsuyama, “A dispersion compensator using coupled defects in a photonic crystal,” IEEE J. Quantum Electron. 38, 825–829 (2002). [CrossRef]

OCIS Codes
(130.2790) Integrated optics : Guided waves
(190.0190) Nonlinear optics : Nonlinear optics
(230.7370) Optical devices : Waveguides
(230.5298) Optical devices : Photonic crystals

ToC Category:
Nonlinear Optics

History
Original Manuscript: November 17, 2008
Revised Manuscript: January 12, 2009
Manuscript Accepted: January 12, 2009
Published: January 22, 2009

Citation
Chih-Hsien Huang, Ying-Hsiuan Lai, Szu-Cheng Cheng, and Wen-Feng Hsieh, "Modulation instability in nonlinear coupled resonator optical waveguides and photonic crystal waveguides," Opt. Express 17, 1299-1307 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-3-1299


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References

  1. E. Yablonovitch, "Photonic band-gap crystals," J. Phys. Condens. Matter 5, 2443-2460 (1993). [CrossRef]
  2. E. Yablonovitch, "Photonic band-gap structures," J. Opt. Soc. Am. B 10, 283-295 (1993). [CrossRef]
  3. D. W. Prather, S. Y. Shi, J. Murakowski, G. J. Schneider, A. Sharkawy, C. H. Chen, and B. L. Miao, "Photonic crystal structures and applications: Perspective, overview, and development," IEEE J. Sel. Top. Quantum Electron. 12, 1416-1437 (2006). [CrossRef]
  4. N. Stefanou and A. Modinos, "Impurity bands in photonic insulators," Phys. Rev. B 57, 12127-12133 (1998). [CrossRef]
  5. A. Yariv, Y. Xu, R. K. Lee, and A. Scherer, "Coupled-resonator optical waveguide: a proposal and analysis," Opt. Lett. 24, 711-713 (1999). [CrossRef]
  6. A. Imhof, W. L. Vos, R. Sprik, and A. Lagendijk, "Large dispersive effects near the band edges of photonic crystals," Phys. Rev. Lett. 83, 2942-2945 (1999). [CrossRef]
  7. W. J. Kim, W. Kuang, and J. D. O'Brien, "Dispersion characteristics of photonic crystal coupled resonator optical waveguides," Opt. Express 11, 3431-3437 (2003). [CrossRef] [PubMed]
  8. S. F. Mingaleev, Y. S. Kivshar, and R. A. Sammut, "Long-range interaction and nonlinear localized modes in photonic crystal waveguides," Phys. Rev. E 62, 5777-5782 (2000). [CrossRef]
  9. S. F. Mingaleev, and Y. S. Kivshar, "Self-trapping and stable localized modes in nonlinear photonic crystals," Phys. Rev. Lett. 86, 5474-5477 (2001). [CrossRef] [PubMed]
  10. D. N. Christodoulides and N. K. Efremidis, "Discrete temporal solitons along a chain of nonlinear coupled microcavities embedded in photonic crystals," Opt. Lett. 27, 568-570 (2002). [CrossRef]
  11. S. F. Mingaleev, A. E. Miroshnichenko, Y. S. Kivshar, and K. Busch, "All-optical switching, bistability, and slow-light transmission in photonic crystal waveguide-resonator structures," Phys. Rev. E 74, 046603 (2006). [CrossRef]
  12. A. G. Shagalov, "Modulational instability of nonlinear waves in the range of zero dispersion," Physics Lett. A 239, 41-45 (1998). [CrossRef]
  13. L. Hadzievski, M. Stepic, and M. M. Skoric, "Modulation instability in two-dimensional nonlinear Schrodinger lattice models with dispersion and long-range interactions," Phys. Rev. B 68, 014305 (2003). [CrossRef]
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