Perfect set-and-forget alignment of silicon photonic resonators and interferometers

Shen, Yiran; Divliansky, Ivan; Basov, D. N.; Mookherjea, Shayan

doi:10.1364/ofc.2011.pdpc3

Cited by 47 publications

(45 citation statements)

References 10 publications

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“…The latter method has a possible advantage in that we can characterize and then tune the static imperfections of the effective X, Z measurements very well. This "set-and-forget" possibility has already been demonstrated to work with incredible accuracy [9,44]. Also, since Xmeasurements are more sensitive, perhaps we make them the default and switch only to a Z-measurement?…”

Section: Switches/phase Shiftersmentioning

confidence: 99%

Why I am optimistic about the silicon-photonic route to quantum computing

2017

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This is a short overview a explaining how building a large-scale, silicon-photonic quantum computer has been reduced to the creation of good sources of 3-photon entangled states (and may simplify further). Given such sources, each photon need pass through a small, constant, number of components, interfering with at most 2 other spatially nearby photons, and current photonics engineering has already demonstrated the manufacture of thousands of components on two-dimensional semiconductor chips with performance that allows the creation of tens of thousands of photons entangled in a state universal for quantum computation.At present the fully-integrated, silicon-photonic architecture we envisage involves creating the required entangled states by starting with single-photons produced non-determistically by pumping silicon waveguides (or cavities) combined with on-chip filters and nanowire superconducting detectors to herald that a photon has been produced. These sources are multiplexed into being near-deterministic, and the single photons then passed through an interferometer to non-deterministically produce small entangled states -necessarily multiplexed to near-determinism again. This is followed by a 'ballistic' scattering of the small-scale entangled photons through an interferometer such that some photons are detected, leaving the remainder in a large-scale entangled state which is provably universal for quantum computing implemented by single-photon measurements.There are a large number of questions regarding the optimum ways to make and use the final cluster state, dealing with static imperfections, constructing the initial entangled photon sources and so on, that need to be investigated before we can aim for millions of qubits capable of billions of computational time-steps. The focus in this article is on the theoretical side of such questions.

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Section: Switches/phase Shiftersmentioning

confidence: 99%

Why I am optimistic about the silicon-photonic route to quantum computing

2017

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“…One potential method is based on photo-chemistry as shown in polymer microrings [40]. For silicon microrings, our method is based on field-induced local oxidation of Si to SiO2 via a chemical reaction near an electrically-biased conducting atomic-force microscope tip [41], [42]. For convenience, we used an atomic force microscope available in our lab, but no part of our method depends on "atomic forces".…”

Section: Subsequent Extensionsmentioning

confidence: 99%

Scaling Properties of Silicon Microring CROWs (Project Report 0925399-Y3)

Mookherjee¹

2021

Preprint

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“…For example, a 1 nm variation in waveguide width of an SOI-based ring can cause a 2 nm shift in the operating wavelength [26], while the temperature sensitivity of the resonant wavelength peak typically varies between 60 pm/K and 100 pm/K [27]. Therefore, both active device tuning, and various post-fabrication trimming techniques have been used to precisely control the resonant wavelength [28][29][30][31][32][33].…”

Section: Published Bymentioning

confidence: 99%

Laser trimming of the operating wavelength of silicon nitride racetrack resonators

et al. 2020

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We demonstrate the possibility of post-fabrication trimming of the response of nitrogen-rich silicon nitride racetrack resonators by using an ultraviolet laser. The results revealed the possibility to efficiently tune the operating wavelength of fabricated racetrack resonators to any point within the full free spectral range. This process is much faster than similar, previously presented methods (in the order of seconds, compared to hours). This technique can also be applied to accurately trim the optical performance of any other silicon photonic device based on nitrogen-rich silicon nitride.

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Perfect set-and-forget alignment of silicon photonic resonators and interferometers

Cited by 47 publications

References 10 publications

Why I am optimistic about the silicon-photonic route to quantum computing

Why I am optimistic about the silicon-photonic route to quantum computing

Scaling Properties of Silicon Microring CROWs (Project Report 0925399-Y3)

Laser trimming of the operating wavelength of silicon nitride racetrack resonators

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