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In an earlier paper we introduced the concept of the perfect lens which focuses both near and far electromagnetic fields, hence attaining perfect resolution. Here we consider refinements of theâ€¦ (More)

In the past few years, new developments in structured electromagnetic materials have given rise to negative refractive index materials which have both negative dielectric permittivity and negativeâ€¦ (More)

We extend the ideas of the perfect lens recently proposed [J.B. Pendry, Phys. Rev. Lett. 85, 3966 (2000)] to an alternative structure. We show that a slab of a medium with negative refractive indexâ€¦ (More)

- S. Anantha Ramakrishna, J. B. Pendry
- 2002 32nd European Microwave Conference
- 2002

We present refinements of the original perfect lens which focuses both the near and the far electromagnetic fields. We show that the performance of the perfect lens can be enhanced significantly byâ€¦ (More)

- Govind Dayal, S. Anantha Ramakrishna
- Optics express
- 2012

Simple designs for polarization independent, metamaterial absorbers at mid-infrared wavelengths and over wide angle of incidence are evaluated computationally. One design consists of an array ofâ€¦ (More)

- S. Anantha Ramakrishna, Olivier J. F. Martin
- Optics letters
- 2005

We address the general issue of resolving the wave vector in complex electromagnetic media including negative refractive media. This requires us to make a physical choice of the sign of a square rootâ€¦ (More)

It has been shown that a slab of materials with refractive index n = âˆ’1 behaves like a perfect lens focusing all light to an exact electromagnetic copy of an object. The original lens is limited toâ€¦ (More)

- Sangeeta Chakrabarti, S. Anantha Ramakrishna, SÃ©bastien Guenneau
- Optics express
- 2006

The electromagnetic properties of finite checkerboards consisting of alternating rectangular cells of positive refractive index (epsilon= +1, micro= +1) and negative refractive index (epsilon= -1,â€¦ (More)

- Govind Dayal, S. Anantha Ramakrishna
- Optics letters
- 2013

We propose a metamaterial saturable absorber mirror at midinfrared wavelengths that can show a saturation of absorption with intensity of incident light and switch to a reflecting state. The designâ€¦ (More)

- Lipsa Nanda, Aakash Basu, S. Anantha Ramakrishna
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2006

We show that arrival times for electromagnetic pulses measured through the rate of absorption in an ideal impedance matched detector are equivalent to the arrival times using the average flow ofâ€¦ (More)