Femtosecond Optical Trap-Assisted Nanopatterning through Microspheres by a Single Ti:Sapphire Oscillator

Autor:	Artyom A. Astafiev, Dmytro O. Plutenko, V. A. Nadtochenko, Oleg M. Sarkisov, A. M. Shakhov, Anatoly I. Shushin
Rok vydání:	2015
Předmět:	Range (particle radiation) Materials science business.industry Physics::Optics Dielectric Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Cardinal point Optics Femtosecond Tweezers Sapphire Particle Physical and Theoretical Chemistry business Beam (structure)
Zdroj:	The Journal of Physical Chemistry C. 119:12562-12571
ISSN:	1932-7455 1932-7447
Popis:	A new approach for fabricating a range of patterns using femtosecond optical trap-assisted nanopatterning is presented. We report how a single Gaussian laser beam from a 55 fs, 80 MHz, 780 nm Ti:sapphire oscillator trapping dielectric microspheres near surfaces can be used to enable near-field, direct-write, subwavelength ∼λ/6 (∼130 nm), two-dimensional nanopatterning of a polymer surface. We discuss the stability conditions for effective manipulation of the particle by the pulsed beam. Klein–Kramers and Brownian motion models were used to analyze the positional accuracy of femtosecond tweezers. We studied effects of the microsphere size, pulsed laser energy and light polarization, and spacing between objective focal plane and polymer surface on the pattern size experimentally and theoretically. Microspheres with a diameter of about 1 μm provide the smallest patterns. The experimental results are reasonably matched by generalized Lorentz–Mie theory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f08f695bbc4cbf7ee2a92204961e5ef https://doi.org/10.1021/acs.jpcc.5b00478 Zobrazit plný text záznamu