BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:US/Eastern BEGIN:DAYLIGHT DTSTART:20220313T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20211107T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20211113T012153Z UID:5DA4C66F-717B-4E61-A463-C55D90A0ECBE DTSTART;TZID=US/Eastern:20211112T090000 DTEND;TZID=US/Eastern:20211112T100000 DESCRIPTION:Speaker: Prof. Rachel Oliver\, Department of Materials Science and Metallurgy\, University of Cambridge\n\nAbstract: A quantum light sour ce is a device that can generate one single photon – or an entangled pai r of photons - on demand. Whilst a single photon emitter would be pretty u seless as a car headlight or bedside lamp\, these devices are in increasin g demand for new developments in optical communication which might exploit fundamental principles of quantum physics to achieve data security. Linea r optical quantum computation\, precision optical measurement and even ran dom number generation also present potential applications opportunities fo r such light sources. However\, many of the most mature quantum light sour ces operate at temperatures only accessible using liquid helium\, at best inconvenient and at worst prohibitive for applications. Exploiting nitride semiconductors allows device concepts developed in the more conventional arsenide semiconductor family to be applied\, but whilst arsenide devices are limited to cryogenic temperatures\, nitride devices can operate at tem peratures accessible using on-chip\, Peltier cooling\, and in some cases e ven at room temperature. Unfortunately\, working with these less mature se miconductors has its pitfalls: high densities of defects and the impact of internal electric fields can limit device performance. For example\, the wavelength of emission from nitride single photon emitters wanders with ti me\, which is not compatible with applications which demand resonance of t he emitter with a cavity or (more stringently) the emission of indistingui shable photons. Nitrides crystals grown in unusual orientations can overco me these challenges whilst maintaining good temperature stability\, provid ing new opportunities for real-world quantum technologies.\n\nBio: Profess or Rachel Oliver is Director of the Cambridge Centre for Gallium Nitride. She leads research projects across the full range of the Centre’s activi ties\, and her personal passion is understanding how the small scale struc ture of nitride materials effects the performance and properties of device s. She uses expertise in microscopy and materials growth to lead the devel opment of new nanoscale nitride structures which will provide new function ality to the devices of the future. She is also passionate about communica ting science to the general public and hence widening participation in sci ence by under-represented groups\, particularly women. Dr. Oliver is a Fel low of the Royal Academy of Engineering.\n\nVirtual: https://events.vtools .ieee.org/m/285280 LOCATION:Virtual: https://events.vtools.ieee.org/m/285280 ORGANIZER:sleee@umich.edu SEQUENCE:7 SUMMARY:IEEE Photonics Society Distinguished Lecture: Nitrides for quantum light sources URL;VALUE=URI:https://events.vtools.ieee.org/m/285280 X-ALT-DESC:Description: <br /><p><strong>Speaker:</strong> Prof. Rachel Oli ver\, Department of Materials Science and Metallurgy\, University of Cambr idge</p>\n<p><strong>Abstract: </strong>A quantum light source is a device that can generate one single photon &ndash\; or an entangled pair of phot ons - on demand.&nbsp\; Whilst a single photon emitter would be pretty use less as a car headlight or bedside lamp\, these devices are in increasing demand for new developments in optical communication which might exploit f undamental principles of quantum physics to achieve data security.&nbsp\; Linear optical quantum computation\, precision optical measurement and eve n random number generation also present potential applications opportuniti es for such light sources. &nbsp\; However\, many of the most mature quant um light sources operate at temperatures only accessible using liquid heli um\, at best inconvenient and at worst prohibitive for applications.&nbsp\ ; Exploiting nitride semiconductors allows device concepts developed in th e more conventional arsenide semiconductor family to be applied\, but whil st arsenide devices are limited to cryogenic temperatures\, nitride device s can operate at temperatures accessible using on-chip\, Peltier cooling\, and in some cases even at room temperature. &nbsp\; &nbsp\;Unfortunately\ , working with these less mature semiconductors has its pitfalls: high den sities of defects and the impact of internal electric fields can limit dev ice performance.&nbsp\; For example\, the wavelength of emission from nitr ide single photon emitters wanders with time\, which is not compatible wit h applications which demand resonance of the emitter with a cavity or (mor e stringently) the emission of indistinguishable photons. Nitrides crystal s grown in unusual orientations can overcome these challenges whilst maint aining good temperature stability\, providing new opportunities for real-w orld quantum technologies.</p>\n<p><strong>Bio: </strong>Professor Rachel Oliver is Director of the Cambridge Centre for Gallium Nitride.&nbsp\; She leads research projects across the full range of the Centre&rsquo\;s acti vities\, and her personal passion is understanding how the small scale str ucture of nitride materials effects the performance and properties of devi ces. She uses expertise in microscopy and materials growth to lead the dev elopment of new nanoscale nitride structures which will provide new functi onality to the devices of the future. She is also passionate about communi cating science to the general public and hence widening participation in s cience by under-represented groups\, particularly women. Dr. Oliver is a F ellow of the Royal Academy of Engineering.</p> END:VEVENT END:VCALENDAR