From dag.hanstorp at physics.gu.se Mon Feb 12 09:08:51 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Mon, 12 Feb 2024 09:08:51 +0100 Subject: [Dhg] this week Message-ID: Hi, My leg is not so good for walking, so I will work from home, at least in the beginning of this week. However, I hardly have any meetings, so you can always pop by my zoom room, insteady of my office. But please send a mail so I can turn it on. regards dag -- Dag Hanstorp Professor +46317869141 From dag.hanstorp at physics.gu.se Tue Feb 20 09:58:51 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Tue, 20 Feb 2024 09:58:51 +0100 Subject: [Dhg] working from home Message-ID: <79437e9c-1fdf-4fda-8622-0bc13d600d6f@physics.gu.se> Hi, I am still highly immobile and will work from home. You are most welcome to call, mail or zoom. regards dag -- Dag Hanstorp Professor +46317869141 From dag.hanstorp at physics.gu.se Thu Feb 22 09:42:34 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Thu, 22 Feb 2024 09:42:34 +0100 Subject: [Dhg] cups Message-ID: Hi, The cleaning staff is complaining that there are a lot of cups in our kitchen. Please return after use to the main coffee room. H?lsningar Dag -- Dag Hanstorp Professor phone +46317869141 From dag.hanstorp at physics.gu.se Fri Feb 23 08:45:51 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Fri, 23 Feb 2024 08:45:51 +0100 Subject: [Dhg] Valerias thesis In-Reply-To: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> References: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> Message-ID: Hi All, You are all very welcome to Valeria?s thesis presentation. Cake will be served afterwards. Regards Dag Location: PJ 27 Time: Tuesday 27/2 15.00 Speaker:?Valeria Zu?iga P?rez Title: Exploring Dynamics of Micro-sized Liquid Particles in Double Potential Optical Trap The Abstract: Optical levitation, enabled by the radiation pressure of light, lifts and holds small particles in mid-air without physical contact by utilizing photons? momentum, offering precise manipulation through control of light properties like intensity, focus, and polarization. This thesis addresses the experiment of a double potential optical trap in order to characterize the latter and the trapped particle, as well as the dynamics of the system. The trap is made up of two strongly focused lasers and by utilizing liquid particles instead of solid ones, the effects of particle shape irregularities and optical force imbalances have been mitigated, yielding more reliable data on particle movement and position. With the variables of the distance between the traps, relative power between both, and the size of the particles, we tried to observe the greatest number of jumps possible. In this thesis you will find the jumps made by the liquid particle, both defined and undefined, and the analysis of jumping rates. Concluding that in fact a micrometric liquid particle also jumps feeling the double potential, all in air. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: WC1R2C3Cm4Uhws4D.png Type: image/png Size: 85724 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: KMQtLoklA0CKAbG3.png Type: image/png Size: 2299468 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Double-trap1.png Type: image/png Size: 56872 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: mysetup.jpg Type: image/jpeg Size: 2792099 bytes Desc: not available URL: From dag.hanstorp at physics.gu.se Fri Feb 23 09:47:24 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Fri, 23 Feb 2024 09:47:24 +0100 Subject: [Dhg] Valerias thesis In-Reply-To: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> References: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> Message-ID: Hi All, You are all very welcome to Valeria?s thesis presentation. Cake will be served afterwards. Regards Dag Location: PJ 27 Time: Tuesday 27/2 15.00 Speaker:?Valeria Zu?iga P?rez Title: Exploring Dynamics of Micro-sized Liquid Particles in Double Potential Optical Trap The Abstract: Optical levitation, enabled by the radiation pressure of light, lifts and holds small particles in mid-air without physical contact by utilizing photons? momentum, offering precise manipulation through control of light properties like intensity, focus, and polarization. This thesis addresses the experiment of a double potential optical trap in order to characterize the latter and the trapped particle, as well as the dynamics of the system. The trap is made up of two strongly focused lasers and by utilizing liquid particles instead of solid ones, the effects of particle shape irregularities and optical force imbalances have been mitigated, yielding more reliable data on particle movement and position. With the variables of the distance between the traps, relative power between both, and the size of the particles, we tried to observe the greatest number of jumps possible. In this thesis you will find the jumps made by the liquid particle, both defined and undefined, and the analysis of jumping rates. Concluding that in fact a micrometric liquid particle also jumps feeling the double potential, all in air. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: WC1R2C3Cm4Uhws4D.png Type: image/png Size: 85724 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: KMQtLoklA0CKAbG3.png Type: image/png Size: 2299468 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Double-trap1.png Type: image/png Size: 56872 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: mysetup.jpg Type: image/jpeg Size: 2792099 bytes Desc: not available URL: From dag.hanstorp at physics.gu.se Mon Feb 26 08:52:19 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Mon, 26 Feb 2024 08:52:19 +0100 Subject: [Dhg] Valerias thesis will be in Nexus In-Reply-To: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> References: <21e1e389-2b31-48f1-8643-8b8921e49dd5@physics.gu.se> Message-ID: <5eaccd74-7072-47a6-a980-4fbf8a99d60c@physics.gu.se> Hello again, I was wrong about location in last mail, but it is now corrected. Regards dag Hi All, You are all very welcome to Valeria?s thesis presentation. Cake will be served afterwards. Regards Dag Location: Nexus Time: Tuesday 27/2 15.00 Speaker:?Valeria Zu?iga P?rez Title: Exploring Dynamics of Micro-sized Liquid Particles in Double Potential Optical Trap The Abstract: Optical levitation, enabled by the radiation pressure of light, lifts and holds small particles in mid-air without physical contact by utilizing photons? momentum, offering precise manipulation through control of light properties like intensity, focus, and polarization. This thesis addresses the experiment of a double potential optical trap in order to characterize the latter and the trapped particle, as well as the dynamics of the system. The trap is made up of two strongly focused lasers and by utilizing liquid particles instead of solid ones, the effects of particle shape irregularities and optical force imbalances have been mitigated, yielding more reliable data on particle movement and position. With the variables of the distance between the traps, relative power between both, and the size of the particles, we tried to observe the greatest number of jumps possible. In this thesis you will find the jumps made by the liquid particle, both defined and undefined, and the analysis of jumping rates. Concluding that in fact a micrometric liquid particle also jumps feeling the double potential, all in air. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: WC1R2C3Cm4Uhws4D.png Type: image/png Size: 85724 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: KMQtLoklA0CKAbG3.png Type: image/png Size: 2299468 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Double-trap1.png Type: image/png Size: 56872 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: mysetup.jpg Type: image/jpeg Size: 2792099 bytes Desc: not available URL: From dag.hanstorp at physics.gu.se Mon Feb 26 12:26:25 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Mon, 26 Feb 2024 12:26:25 +0100 Subject: [Dhg] still home Message-ID: Hi, My hip in not any better (rather the contrary) and I will work from home until it improves. Until then, I will be fully availabe via phone, mail or zoom. With best regards Dag -- Dag Hanstorp Professor +46317869141 From dag.hanstorp at physics.gu.se Wed Feb 28 14:26:11 2024 From: dag.hanstorp at physics.gu.se (Dag Hanstorp) Date: Wed, 28 Feb 2024 14:26:11 +0100 Subject: [Dhg] technical student at CERN Message-ID: <61761735-9d68-40f7-92b7-c3dd42035d5e@physics.gu.se> Dear All, Please find appended info about a 1 year technical student position at CERN. Apply and/or spread to people who could be interested. Regards Dag -- Dag Hanstorp Professor +46317869141 -------------- next part -------------- A non-text attachment was scrubbed... Name: Technical studentship CERN Spring 2024.pdf Type: application/pdf Size: 255315 bytes Desc: not available URL: From di.lu at physics.gu.se Thu Feb 29 10:33:46 2024 From: di.lu at physics.gu.se (Di Lu) Date: Thu, 29 Feb 2024 09:33:46 +0000 Subject: [Dhg] Friday group meeting Message-ID: Dear all, Tomorrow we will have our weekly group meeting at 14:30 in Von Bahr. I will bring us a talk concerning laser safety. Fika will be served, so Welcome! All the best, Ludi -------------- next part -------------- An HTML attachment was scrubbed... URL: