Indian Institute of Technology Kanpur

Jawaharlal Nehru Centre for Advanced Scientific Research

Ankur Verma

Ashutosh Sharma

Giridhar U Kulkarni

Methods and devices for preparing microscale polymer relief structures from a thin polymer layer on an absorbing substrate are described. The described methods are ultrafast (about 8 nanoseconds) and allow formation of patterned microstructures having complex morphologies and narrow line widths that are an order of magnitude smaller than the masks used in the methods.

Micropattern generation with pulsed laser diffraction

Techniques related to miniature lenses and lens arrays are generally described herein. The described techniques may be embodied in apparatuses, systems, methods and/or processes for making and using such lenses. In some examples, the various techniques may be utilized for miniature lenses such as nanometer to micron sized spherical lenses or lens arrays. An example process may include dewetting polymer films to form such lenses. The resulting lens-size may be tunable from about 200 nm to a few tens of microns, and more particularly in a range from about 200 nm to about 10 &#x3bc;m with spherical shapes of contact angles ranging from about 30&#xb0; to about 150&#xb0;. The resulting lenses may be tunable polymeric structures formed generally by self-organized room temperature dewetting of ultrathin polymer films by reducing the surface tension.

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Kanpur, India

Ankur Verma