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In this chapter, methods for actively controlling the resonant wavelength of photonic microresonators in order to manipulate the propagation of light are introduced. The presented tuning mechanisms are based on the free-carrier dispersion effect and the thermo-optic effect. The free carriers and the thermal power required for the tuning can be generated either electrically or optically, enabling different...
Here we demonstrate a reconfigurable electro-optical directed-logic circuit based on a 4-fold array of switches. We showed that this circuit can be reconfigured to perform arbitrary two-input logic functions with speed up to 3 Gb/s.
Wavelength conversion by the four-wave mixing process in a resonator faces a tradeoff between the bandwidth and the resonant enhancement. We show that a double-ring resonator can enhance the conversion efficiency without sacrifice the bandwidth.
We show a diffraction-based coupling scheme that allows a high-Q micro-resonator to directly manipulate a free-space optical beam at normal incidence. The normal-incident transmission and reflection change 40% over a wavelength range of 0.3 nm.
We show a scalable and reconfigurable optical logic architecture based on a regular array of integrated optical switches. We present a proof-of-principle demonstration with a 2 ×2 switch array that can perform arbitrary two-input logic functions.
We show a sharp Fano resonance when terahertz waves pass through two concentric ring apertures in a metal film. A high-Q and intensive dark mode is indirectly excited by coupling to a low-Q bright mode.
We demonstrated extraordinary THz transmission through ring apertures on a metal film. Transmission of 60% was obtained with an aperture-to-area ratio of only 1.4%. We show that the high transmission can be suppressed by over 18 dB with a thin layer of free carriers in the silicon substrate underneath the metal film. This result suggests that CMOS-compatible terahertz switch can be built by controlling...
The paper presents a new optical directed logic architecture that is based on a regular array of integrated optical switches. The same circuit can be reconfigured to perform different combinational logic functions. Its application in network routing is discussed.
We demonstrate the first error-free transmission of DPSK using a microring modulator, with a power penalty of 1.1 dB in comparison to a commercial LiNb03 phase modulator. Additionally, long-haul transmission of microring-modulated DPSK is characterized.
We propose and efficient optical coupler between sub-micron sized silicon waveguides on chip and multi-micron wide polymer waveguides on board. We show low coupling loss < 0.4 dB with high tolerance to misalignment.
Coupling of the NV− ZPL to a silica microcavity and tapered fiber is demonstrated at cryogenic temperatures. Coupling to a high-Q cavity should enhance the usefulness of the NV− for quantum information applications.
Coupling of the NV− ZPL to a silica microcavity and tapered fiber is demonstrated at cryogenic temperatures. Coupling to a high-Q cavity should enhance the usefulness of the NV− for quantum information applications.
We demonstrate ultra fast tuning of the optical quality factor of a resonator on a silicon chip using electro-optic tuning. We tune the cavity quality factor from 20,000 to 6,000 in 100 ps.
We demonstrate superluminal pulse propagation on a silicon chip using an all -optical analog to electromagnetically induced absorption created by the coherent interaction between two micro-resonators. We show group indices tunable between −1158 and −312.
We show cascaded silicon microring resonators with 1.5-μm radius critically coupled to a narrower waveguide. A coupled Q of 9,000 is achieved. Devices are fabricated with the widely-available SEM-based lithography system using a stitching-free design.
We demonstrate superluminal pulse propagation on a silicon chip using an all -optical analog to electromagnetically induced absorption created by the coherent interaction between two micro-resonators. We show group indices tunable between -1158 and -312.
We show cascaded silicon microring resonators with 1.5-mum radius critically coupled to a narrower waveguide. A coupled Q of 9,000 is achieved. Devices are fabricated with the widely-available SEM-based lithography system using a stitching-free design.
We demonstrate ultra fast tuning of the optical quality factor of a resonator on a silicon chip using electro-optic tuning. We tune the cavity quality factor from 20,000 to 6,000 in 100 ps.
Coupling of the NV- ZPL to a silica microcavity and tapered fiber is demonstrated at cryogenic temperatures. Coupling to a high-Q cavity should enhance the usefulness of the NV- for quantum information applications.
We experimentally demonstrate electrooptic modulation in silicon at 18 Gbps (NRZ) in a micro-ring of 12 micron diameter using a pre-emphasis technique. Device simulations indicate that this technique can extend the bit rate to 40 Gbps.
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