Michael Ferraro

Learn More
Electrowetting retroreflectors use a simple and scalable construction, and incorporate an electrically tunable liquid lenslet. By electrically modulating the lenslet geometry, the reflection is switched between retroreflection and scattering. In this paper, we report new capability and characterization, including higher index liquids and contrast ratio as a(More)
Modulating retroreflectors ͑MRRs͒ couple passive optical ret-roreflectors with electro-optic modulators to allow free-space optical communication with a laser and pointing-acquisition-tracking system required on only one end of the link. Recently, MRR using multiple quantum well ͑MQW͒ modulators have been demonstrated using a large-area MQW placed in front(More)
No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by(More)
Surface mining, though an efficient method of extracting near-surface coal for the nation's mounting energy needs, requires sound reclamation if the harmful environmental impacts of the method are to be held to a tolerable minimum. Another important requirement is aesthetic quality, a feature which should, but as yet does not, involve professional planners(More)
  • 1