Josh Laney Page -This is a record of Josh's work on the princess Leia project

Wednesday Oct 31 2018:

DAMMANN GRATINGS Found two websites that sell 1D Dammann gratings, better known as Multi-Spot DOE's. https://www.holoor.co.il/quote/order-received/3673/?key=wc_order_5bda287204044 Israel, so I assume long shipping time. Multiple wavelength options.

https://www.lasercomponents.com/us/product/diffractive-elements-for-beam-splitting/ New Hampshire, better shipping, unsure as to specific options.

MICROSPHERES = NEW PARTICLE Here is a link to 3M and their products. You can request samples through an agent, I suggest Rodrigo Zuniga who I have worked through: rzuniga@ethorn.com Hers is 3M's brochure 2017_new_glass_bubbles_overview_through_s28hs.pdf

you can then coat them in carbon by working through Mike Dorias in the geology department. rate is $10 a coating. dorais@byu.edu

The above findings are some current options for gratings as well as for a new particle.

Friday Sept 21 2018: https://www.sciencedirect.com/science/article/pii/S002240731830044X great paper to refer to on everything trapping 1 particle, go to the first table and look at photophoretic traps Notes on types of Particles to trap

1. Carbon nanocluster (can we characterize this) is presented as an option
2. Carbon coated glass sphere (few microns) – see single vortex beam under photophoretic in list
   1. looks like Schvedov has done this! https://core.ac.uk/download/pdf/156626629.pdf
   2. Schvedov's giant particle trap outlines this glass sphere method pretty well https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.105.118103

Friday July 13 2018: Today I took a few pictures to display three trapped particles and two trapped particles for Dr Smalley's grant proposal. I am currently able to trap 2 particles for a few seconds easily, and my best is two for a duration of about a minute. 3 is only ever possible for 1-2 seconds so far I've been able to find with the current grating, trap, alignment etc. I should look into these factors to maximize and improve my setup.

Here are some things I'm noticing but need to confirm with the trap: - cleanliness / correctness of the grating will affect the trap quality (moving to differing parts of the grating showed differing abnormal patterns at a large distance from the focal point, displaying there must be either grime, or the grating is imperfect. It would be good to take a look at this under the microscope and look at a certain area, or just make a better grating/ gratings.