Resonance –Free Light Recycling
نویسندگان
چکیده
The inability to efficiently tune the optical properties of waveguiding structures has been one of the major hurdles for the future scalability of integrated photonic systems. In silicon photonics, although dynamic tuning has been achieved with various mechanisms, even the most effective thermo-optic effect offers a refractive index change of only 1.86 × 10 K. To enhance this small change, light recycling based on resonators has been employed in order to realize efficient modulators, phase shifters, and optical switches. However, the resonant enhancement comes at a great cost of optical bandwidth, fabrication tolerance and system scalability. Here we demonstrate a scalable light recycling approach based on spatialmode multiplexing. Our approach offers a fabrication tolerance of ± 15 nm, in stark contrast
منابع مشابه
Detuned Twin-Signal-Recycling for ultrahigh-precision interferometers.
We propose a new interferometer technique for high-precision phase measurements such as those in gravitational wave detection. The technique utilizes a pair of optically coupled resonators that provide identical resonance conditions for the upper as well the lower phase modulation signal sidebands. This symmetry significantly reduces the noise spectral density in a wide frequency band compared ...
متن کاملBistability in Bipolar Cascade VCSELs
Measurement results on the formation of bistability loops in the light versus current and current versus voltage characteristics of two-stage bipolar cascade VCSELs are presented. It is observed that the bistable behavior is the more pronounced the more the cavity resonance is blue-shifted with respect to the gain maximum of the quantum wells. Additionally, the slope efficiency increases by mor...
متن کاملFörster resonance energy transfer enhanced color-conversion using colloidal semiconductor quantum dots for solid state lighting
In this paper, we present Förster resonance energy transfer FRET -enhanced color-conversion using colloidal semiconductor quantum dot nanocrystals NCs to make reddish-orange light-emitting diodes for use in ultraefficient solid state lighting. To achieve FRET enhancement at 614 nm, we use an energy gradient hybrid structure made of cyanand orange-emitting CdSe/ZnS NCs PL=492 and 588 nm in solut...
متن کاملReduction of the ascorbyl free radical to ascorbate by thioredoxin reductase.
Recycling of ascorbic acid from its oxidized forms is required to maintain intracellular stores of the vitamin in most cells. Since the ubiquitous selenoenzyme thioredoxin reductase can recycle dehydroascorbic acid to ascorbate, we investigated the possibility that the enzyme can also reduce the one-electron-oxidized ascorbyl free radical to ascorbate. Purified rat liver thioredoxin reductase c...
متن کاملThioltranferase mediated ascorbate recycling in human lens epithelial cells.
PURPOSE This study was undertaken to investigate whether thioltransferase (TTase) exhibits dehydroascorbate (DHA) reductase activity in human lens epithelial cells. METHODS TTase was investigated for DHA reductase activity in vitro by the method of glutathione reductase-coupled spectrophotometric assay. DHA reductase activities of human lens epithelial (HLE-B3) cell lysate and TTase-depleted ...
متن کامل