Reflection of light from amplifying medium

Karapetyan, R. V.

doi:10.1134/s1054660x07080051

Cited by 5 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, this choice depends on the angle of the incidence or the thickness of the gain slab [2][3][4][5]. Therefore, even the case of a homogeneous slab, which has repeatedly been described in the literature [3,4,6,7], has not obtained unambiguous treatment until now [8,9].…”

Section: Introductionmentioning

confidence: 95%

Total internal reflection in gain medium slab

et al. 2011

View full text Add to dashboard Cite

The problem of light propagation through a slab of gain medium is studied in terms of the transfer matrix pole distribution. Identifying the lasing by the existence of the poles in the upper half-space of the complex frequencies, we demonstrate that under the condition of total internal reflection lasing may be observed at a finite thickness of the slab; further increase in the thickness results in the quenching of lasing. However, in the latter case the amplification of reflected wave is possible.

show abstract

Section: Introductionmentioning

confidence: 95%

Total internal reflection in gain medium slab

et al. 2011

View full text Add to dashboard Cite

show abstract

“…It is also worth mentioning that more realistic cases of reflection from semi-infinite or finite-sized uniform or periodic amplifying layers require a more complex approach to determine a lasing threshold. 40,41 Convective instability or amplified spontaneous emission corresponds to the existence of modes with real-valued frequency and complex-valued longitudinal wave vector component k y . When Im(k y ) < 0 for the propagation in positive y direction or Im(k y ) > 0 otherwise, modes are amplified along the propagation direction, which means that any spontaneous emission in the system can become a source of the noise, that will be amplified, returning dye molecules from excited to the ground state, and providing a mixing of a noise radiation with the main signal.…”

Section: Model and Equationsmentioning

confidence: 99%

Loss compensation in metal-dielectric layered metamaterials

et al. 2013

View full text Add to dashboard Cite

We analyze a possibility of gain-induced compensation of losses in a one-dimensional layered structure, consisting of alternating layers of metal and dielectric with gain. Using an exact approach without effective medium approximations, we demonstrate that losses can be completely compensated for a certain value of the longitudinal component of the wave vector and partially reduced for other wave numbers. In the systems with larger values of the gain coefficient, convective instabilities can appear. At certain frequencies, losses can be greatly reduced for a broad range of the incidence angles. We find that in the canalization regime when the isofrequency contours are close to straight lines, the loss compensation becomes possible for a wide spatial spectrum being useful for improvement of the subwavelength imaging capability.

show abstract

“…In the last 40 years, a few theoretical papers have dealt with non-trivial characteristics of reflection and refraction at a single transparent-active interface. However, there were many discrepancies when amplified reflection (AR) was considered [5][6][7][8][9][10][11][12][13][14]. As recently pointed out by Siegman [15], 'at least a dozen refereed publications have claimed that amplified total reflection from a single gainy interface is real'.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis presented here is the one underlying one of the earliest theoretical works [7]. It was reintroduced in the past few years due to its mathematical elegance and simplicity, and its nearly straightforward interpretation [11]. Karapetyan [11] compares the Airy formulae (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Active isotropic slabs: conditions for amplified reflection

Perez

Matteo

Etcheverry

et al. 2012

J. Opt.

View full text Add to dashboard Cite

We analyse in detail the necessary conditions to obtain amplified reflection (AR) in isotropic interfaces when a plane wave propagates from a transparent medium towards an active one. First, we demonstrate analytically that AR is not possible if a single interface is involved. Then, we study the conditions for AR in a very simple configuration: normal incidence on an active slab immersed in transparent media. Finally, we develop an analysis in the complex plane in order to establish a geometrical method that not only describes the behaviour of active slabs but also helps to simplify the calculus.

show abstract

Reflection of light from amplifying medium

Cited by 5 publications

References 4 publications

Total internal reflection in gain medium slab

Total internal reflection in gain medium slab

Loss compensation in metal-dielectric layered metamaterials

Active isotropic slabs: conditions for amplified reflection

Contact Info

Product

Resources

About