Abstract

A completely new model of an all-optical switch (AOS) is proposed using a silicon photonic crystal (PhC) slab based nonlinear Mach–Zehnder interferometer (NMZI). Both arms of the NMZI are designed using p-toluene sulfonate (PTS) based slotted PhC waveguides (PTS-SPCWs). Extreme optical confinement in SPCW is used here to intensify optical nonlinearities of PTS. The intensified nonlinearity produces significant phase changes in optical pulses within a small waveguide length, even when the optical power is sufficiently small. One arm of the NMZI is coupled with a control wave to incur additional phase shift compared to the other due to cross-phase modulation, in addition to self-phase modulation, which is a common phenomenon for both. The differential phase shift originates destructive/constructive interference, leading to a successful switching operation of the AOS. Switching characteristics of the AOS are evaluated for a variety of parameters. A typical example shows that the AOS can switch off 12.55 mW probe power with an extinction ratio of $\approx 50.5\;{\rm dB}$ by applying 5.65 mW control power, while the device footprint is merely $259\;\unicode{x00B5} {{\rm m}^2}$. The low-power and high-speed operation makes this small footprint AOS device suitable for applications in photonic integrated circuits.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Integrable all-optical NOT gate using nonlinear photonic crystal MZI for photonic integrated circuit

Shatrughna Kumar and Mrinal Sen
J. Opt. Soc. Am. B 37(2) 359-369 (2020)

High-gain, low-threshold and small-footprint optical parametric amplifier for photonic integrated circuits

Shatrughna Kumar and Mrinal Sen
J. Opt. Soc. Am. B 35(2) 362-371 (2018)

Raman mediated ultrafast all-optical NOR gate

Tanmoy Datta and Mrinal Sen
Appl. Opt. 59(21) 6352-6359 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics