Valappil
Jaleel Valappil, Houston, TX US
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20120123578 | MARKET OPTIMIZATION OF LIQUEFIED NATURAL GAS PROCESS - A method includes controlling a process control system for coordinating the operation of a liquefied natural gas (LNG) process. | 05-17-2012 |
Nikesh V. Valappil, Forest Hills, NY US
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20100097691 | SPIN-COATED POLYMER MICROCAVITY FOR LIGHT EMITTERS AND LASERS - A spin-coated polymer microcavity for light emitters and lasers producing enhancement of spontaneous emission rate from colloidal CdSe/ZnS core/shell quantum dots embedded in a one dimensional polymer microcavity structure at room temperature. The polymer microcavity structures are fabricated using spin coating. Alternating layers of polymers of two different refractive indices were stacked to form the Distributed Bragg reflectors (DBRs). To achieve high reflectivity, the polymers for the DBR structures were chosen so that they have a relatively high refractive index ratio. The high and low refractive index polymers chosen were poly-N(vinylcarbazole) (PVK) and poly acrylic acid (PAA), with refractive indices of 1.683 and 1.420 at 600 nm, respectively. Thin films of quarter wavelength thickness of the two polymers are alternately spin coated on a glass substrate to make the DBR structures. Greater than 90% reflectivity is obtained using ten periods of the structure. A PVK cavity layer of λ thickness embedded with CdSe/ZnS core/shell quantum dots is sandwiched between two of these DBRs to form the entire microcavity structure. The bottom and top DBRs comprise ten and five periods, respectively. | 04-22-2010 |
20100296543 | FLEXIBLE MICROCAVITY STRUCTURE MADE OF ORGANIC MATERIALS USING SPIN-COATING TECHNIQUE AND METHOD OF MAKING - A flexible microcavity structure made of organic materials using spin-coating technique for allowing large area structures using a roll-to-roll process. The structure includes at least one first polymer layer, at least one second polymer layer, and a cavity layer. The cavity layer has quantum dots embedded therein for realizing an electrically pumped microcavity emitter. The at least one first polymer layer alternates with the at least one second polymer layer, respectively, to form a pair of distributed Bragg reflecting mirrors. The cavity layer is sandwiched between the pair of distributed Bragg reflecting mirrors. | 11-25-2010 |
Nikesh V. Valappil, Mumbai IN
Patent application number | Description | Published |
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20120250716 | Flexible Microcavity Structure Made Of Organic Materials Using Spin-Coating Technique And Methods Of Making - A flexible microcavity structure made of organic materials using spin-coating technique for allowing large area structures using a roll-to-roll process. The structure includes at least one first polymer layer, at least one second polymer layer, and a cavity layer. The cavity layer has quantum dots embedded therein fir realizing an electrically pumped microcavity emitter. The at least one first polymer layer alternates with the at least one second polymer layer, respectively, to form a pair of distributed Bragg reflecting mirrors. The cavity layer is sandwiched between the pair of distributed Bragg reflecting mirrors. | 10-04-2012 |