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We demonstrate a compact low-chirp and energy-efficient integrated hybrid Ill-V/Si transmitter based on a Vernier tunable laser that covers the entire C-band, and a low drive voltage push-pull ring modulator that provides large extension ratio and low chirp.
Interconnects accounts for a significant portion of energy consumption in integrated circuits. Optical interconnects, now widely used to link electronic systems such as servers and top of rack switches in data centers, can potentially reduce the energy consumption of electrical interconnects. However, current state-of-the-art optical links consumes about 100s fJ/b to 1 pJ/b, still much too high for...
The spontaneous emission rate of light emitters has been shown to have strong dependence on their local electromagnetic environment1. Optical antennas exploit this effect and can be used to greatly increase the spontaneous emission rate of a coupled light emitter. There have been several demonstrations of this effect with promising results using dye molecules and Er3+ ions2,3. It is predicted that...
We propose enhancing the rate of spontaneous emission from an electrically injected nanoLED with a cavity backed optical slot antenna. Initial experimental results show 2x higher intensity of light emission with polarization parallel with the antenna mode indicating the presence of spontaneous emission enhancement.
Experimental evidence of enhanced spontaneous emission from InP coupled to an optical antenna is presented. Photoluminescence measurements show a 120x increase in light emission from antenna-coupled devices over bare InP emitters.
A circuit model of a single-element linear optical antenna is presented. It agrees well with FDTD simulations and predicts spreading resistance will ultimately limit the maximum rate enhancement an efficient antenna can achieve to ∼10,000.
We present on an optical antenna based nanoLED that is fabricated directly on top of an InP waveguide. Waveguide coupling efficiency of 70% and directional emission is achieved with a Yagi-Uda antenna structure. By using an epitaxial lift-off process, we show that this device could be integrated directly onto a Silicon-photonics substrate.
An optical-antenna nanoLED is coupled into an InP waveguide. Optical emission measurements of Yagi-Uda antennas show a 5x increase in forward coupled light, giving 70% waveguide coupling efficiency and directional emission.
Using a simple antenna model, we show a semiconductor coupled to an optical antenna can significantly increase spontaneous emission rate. Our experimental measurements shows a 20x increase in photoluminescence, which agrees well with the theory.
We present a 7nm bare InGaAsP quantum well coupled to a gold nanorod. Photoluminescence measurements show an increased spontaneous emission rate of at least 4.5× without sacrificing efficiency.
Arch-dipole optical antennas with uniform 5nm gaps have been fabricated on Si substrate using deep-UV “spacer” lithography. Strong surface-enhanced Raman scattering (SERS) signals with an enhancement factor of 1.1×108 have been measured.
An optical antenna based nanoLED design that enhances photoluminescence of a semiconductor emitter by more than 10x is presented. The small mode (0.015 (λ0/2n)3) and physical (3×10−4 λ03) volumes are attractive for on-chip optical interconnect applications.
Guidelines for designing an optical antenna for optimizing the performance of a nanophotodiode are proposed. A nanopatch design is simulated with over 70% absorption efficiency using germanium as the absorber.
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