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X-ORIGINAL-URL:https://www.quantumx.washington.edu
X-WR-CALDESC:Events for UW QuantumX
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260402T123000
DTEND;TZID=America/Los_Angeles:20260402T133000
DTSTAMP:20260427T205920Z
CREATED:20260325T215236Z
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UID:9929-1775133000-1775136600@www.quantumx.washington.edu
SUMMARY:Towards reconfigurable and deterministic twistronic 2D materials
DESCRIPTION:Speaker: Yuan Cao\, University of California at Berkeley\nTwo-dimensional materials (2DM) and their heterostructures offer tunable electrical and optical properties\, primarily modifiable through electrostatic gating and twisting. While electrostatic gating is a well-established method for manipulating 2DM\, achieving real-time control over interfacial properties remains a frontier in exploring 2DM physics and advanced quantum device technology. Current methods\, often reliant on scanning microscopes\, are limited in their application scope\, lacking the accessibility and scalability of electrostatic gating at the device level. In the first half of this seminar\, I will introduce an on-chip platform for 2DM with in situ adjustable interfacial properties\, employing a microelectromechanical system (MEMS). This platform comprises compact\, precise\, and versatile devices capable of voltage-controlled manipulation of 2DM\, including approaching\, twisting\, and pressurizing actions. We demonstrate this technology by creating synthetic topological singularities in the nonlinear optical susceptibility of twisted hexagonal boron nitride (h-BN).In the second half of this seminar\, I will talk about our recent progress in observing symmetry-forbidden second-harmonic generation in almost any 2D crystals\, which is extremely useful for deterministic twistronics. Optical spectroscopy based on second-order nonlinearity is a critical technique for characterizing two-dimensional (2D) crystals\, and it also finds numerous applications in bioimaging and quantum optics. It has been generally believed that second-harmonic generation (SHG) in crystals with inversion centers (centrosymmetric crystals)\, such as graphene and other bilayer 2D crystals\, is negligible without externally breaking the symmetry via strong surface effects. However\, with a new ultra-sensitive detection technique\, we could circumvent the symmetry-imposed constraint and observe robust SHG in pristine centrosymmetric crystals\, even without any symmetry-breaking field. With the exceptional sensitivity\, we directly observe polarization-resolved SHG in bilayer hexagonal boron nitride (h-BN)\, bilayer WSe2\, and remarkably\, Bernal-stacked bilayer graphene\, allowing us to unambiguously identify the crystallographic orientation in all these crystals via SHG. We also demonstrate that the new technique can be used to non-invasively detect uniaxial strain and geometric phase in these centrosymmetric crystals.
URL:https://www.quantumx.washington.edu/calendar/yuan-cao-university-of-california-at-berkeley-towards-reconfigurable-and-deterministic-twistronic-2d-materials/
CATEGORIES:Physics
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260407T133000
DTEND;TZID=America/Los_Angeles:20260407T143000
DTSTAMP:20260310T180010Z
CREATED:20260202T191302Z
LAST-MODIFIED:20260310T180010Z
UID:8785-1775568600-1775572200@www.quantumx.washington.edu
SUMMARY:IQuS Research Seminar: Mark Rudner (University of Washington)
DESCRIPTION:Hybrid option available\, register on event website
URL:https://www.quantumx.washington.edu/calendar/mark-rudner-university-of-washington/
LOCATION:PAB C421\, 3910 15th Ave NE\, Seattle\, WA\, 98195
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260413T160000
DTEND;TZID=America/Los_Angeles:20260413T160000
DTSTAMP:20260325T203047Z
CREATED:20260319T221603Z
LAST-MODIFIED:20260325T203047Z
UID:9455-1776096000-1776096000@www.quantumx.washington.edu
SUMMARY:: TBA
DESCRIPTION:: TBA\nPAA A102\nColloquia\nhttps://phys.washington.edu/events/2026-04-13/tba
URL:https://www.quantumx.washington.edu/calendar/physics-seminar-dahlia-klein-university-of-chicago/
LOCATION:PAA A102
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260420T160000
DTEND;TZID=America/Los_Angeles:20260420T160000
DTSTAMP:20260405T211640Z
CREATED:20260319T221758Z
LAST-MODIFIED:20260405T211640Z
UID:9456-1776700800-1776700800@www.quantumx.washington.edu
SUMMARY:Physics Seminar: Allan Macdonald (University of Texas at Austin)
DESCRIPTION:PAA A102Colloquiahttps://phys.washington.edu/events/2026-04-20/tba
URL:https://www.quantumx.washington.edu/calendar/physics-seminar-allan-macdonald-university-of-texas-at-austin/
LOCATION:PAA A102
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260427T160000
DTEND;TZID=America/Los_Angeles:20260427T160000
DTSTAMP:20260412T213043Z
CREATED:20260319T222018Z
LAST-MODIFIED:20260412T213043Z
UID:9457-1777305600-1777305600@www.quantumx.washington.edu
SUMMARY:Physics Seminar: Chris Monroe (Duke University)
DESCRIPTION:PAA A102Colloquiahttps://phys.washington.edu/events/2026-04-27/tba
URL:https://www.quantumx.washington.edu/calendar/physics-seminar-chris-monroe-duke-university/
LOCATION:PAA A102
CATEGORIES:Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260428T133000
DTEND;TZID=America/Los_Angeles:20260428T143000
DTSTAMP:20260310T180116Z
CREATED:20260310T175516Z
LAST-MODIFIED:20260310T180116Z
UID:9427-1777383000-1777386600@www.quantumx.washington.edu
SUMMARY:IQuS Research Semimar: Charles Cao (Virginia Tech)
DESCRIPTION:Hybrid option available\, register on event website.
URL:https://www.quantumx.washington.edu/calendar/iqus-research-semimar-charles-cao-virginia-tech/
LOCATION:Physics/Astronomy Building\, C-421\, 3910 15th Ave NE\, Seattle\, Washington\, 98195-1560
CATEGORIES:Physics
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