Shekhar Guha

Title: Shekhar Guha: Innovator in Optical Memory Technology

Introduction

Shekhar Guha is a prominent inventor based in Baltimore, MD (US). He has made significant contributions to the field of optical memory technology, holding a total of 3 patents. His innovative work focuses on enhancing data storage capabilities through advanced optical materials.

Latest Patents

One of Shekhar Guha's latest patents is for an optical volume memory. This optical memory material includes a two-photon storage component that can be written from a first to a second state in response to WRITE light. It is mixed with a signal component that fluoresces by one-photon absorption only at the written locations in response to READ light. The storage material may be a fulgide, and it may also include a frequency upconversion material to aid writing. Writing is performed by a spatial light modulator (SLM) with a dynamic focusing system, concentrating sufficient power at WRITE locations for nonlinear two-photon absorption. Crosstalk is avoided during simultaneous writing by spacing the individual WRITE beams apart by an integer number of inter-beam spacings. This allows non-adjacent datels to be written simultaneously in a 'paragraph,' while non-written areas are addressed at a different time with different paragraphs. The memory material can be translated relative to the SLM to access different paragraphs or accessed by an electronically sparsed SLM. Reading utilizes a sheet of READ light traversing the pages of written material to cause the signal component to fluoresce, imaging the fluorescent pattern onto a detector array. The memory material may be stacked in layers, spaced apart by light waveguides, guiding the READ beam to the page to be read. In another embodiment, writing and erasure are performed by a modulated quasi-one-dimensional sheet of light, intersecting a second, unmodulated sheet of light at a column within the memory material.

Career Highlights

Throughout his career, Shekhar Guha has worked with notable companies such as Martin Marietta Corporation and Lockheed Martin Corporation. His experience in these organizations has contributed to his expertise in optical technologies and innovations.

Collaborations

Some of Shekhar Guha's coworkers include Wenpeng Chen and Kenneth J Ritter. Their collaborative efforts have further advanced the research and development of optical memory technologies.

Conclusion

Shekhar Guha's contributions